anything i might do to break 2ghz without spending any money right now?

[sendatooli]

my tbred 1800 is rock stable at 1950mhz. it will not even post at 2ghz! i have a sk6 and my 340watt ps is at the limit. it takes 1.840v(the highest i can go) to get it to 1950. i have the temps (down) to 50c. under full load. it is 76f. in this room. anything i might try to get over 2ghz without buying anything? or is the chip about at it's limit. or my heatsink and psu is the problem?
do most of these 1800's make it over 2ghz? if they do, i assume with better cooling and a bigger power supply than i have?
well 1950 is not bad. but i am only 50mhz shy of a nice round number. so it would be nice to hit it!
any tips or tricks are appreciated.



thank you,
sendatooli.

[Pouey]

I think your temps are the issue. 50c is high. My tbred a wouldn't overclock with temps that high either. I reseated my heatsink and got temps around 35c and i get 2ghz no problem.

[sendatooli]

originally i was at 53-54c. i cnc machined the heatsink. it is now at 50c. under full load, not at idle. it is completely stable at 1950 but will not even post at 2ghz. i think i have reached the limit of this heatsink. your slk800 is a lot better heatsink. plus i am only using a 26cfm fan and it is 76f. ambient in here. without buying a better heatsink i think i have reached the limit. this chip is putting out watts in the high 90's now and the sk6 was not designed for that. plus the die is smaller on the tbred. it must need better cooling. i know that is the key since when i had the heatsink improperly placed to begin with it wouldnt even post at 1800mhz.
cooling appears to be criticle to overclocking these.
if anyone knows an idea of how to furhter my current colling rig without spending any money (or very little) please tell.

if i get a better heatsink how high can i expect this chip to go? is it worth it for me to spend more than i did on the cpu to go an additional 100mhz? or can i expect this thing to get over 2200mhz? it does not look like it is going to make it with the sk6, so i might as well stop fiddling with it right now.


pouey, what speed are you at with the slk800?



thank you,
sendatooli.

[Lithan]

Uhh... I doubt heat is the problem if it wont even post. Athlons heat up fast, but not that fast.

What make is the power supply. Whats the combined output on 3.3 and 5? How many amps on 12?

Are you trying to push the FSB more to break 2ghz? If so, are you sure all the other components can handle a higher FSB?

[R.Rabbit]

cut a whole in the side of your case, make a funnel(pringle can?) from the side to your hsf, this will bring nice cool air from outside your case

[sendatooli]

i have a ram air on the side of the case. it is as cool as it is going to get with this heatsink. i am surprised that a slk800 is keeping pouey's at 30c. i guess it is way better than the sk6. my maximum fsb is 150. at 13.5x multiplier i cannot even post at 147fsb which is 1984mhz. the power supply is an enlight 340 watt. which is most likely the problem here. i see that the 5 volt is already under 5 volts. and the 3.3 is right at 3.3. with the chip at a lower speed 5 is higher than 5 and so is 3.3. it still seems strange that it runs stable at 1950 and will not even post at 1984. i would think if it was stable at 1950, it would at least make it into windows before crashing. or it would not even be stable at 1950. that is my experience. can any one explain what is going on here? honestly though, if it boils down to needing a new heatsink and/or power supply to get another 50mhz i am just going to leave it be. besides, to break 2000 i have to go 2025 that might just not be possible. i have heard of only a couple of these going OVER 2000. and those people had way better cooling and power supplys. if anyone thinks i can get it to 2025 with what i have, please advise. i might add that the board is a k7s5a which is not designed to be overclocked and the chipset sink fell off once! i reattached it with as adhesive. now it runs over 40c. at 150fsb. at 133fsb it runs like 26c. that may be the problem too, this board was not made for this. but it ran a pr1600 fine at 150. it runs this one at 13x. 150. but not 13.5x. the bios may just not understand this high speed. that could also be the problem. it does recognize a pr2600 but not 13.5x 150 fsb. that isn't exactly the pr2600 it had in mind :).



thank you,
sendatooli.



i forgot to mention that there are 4 pci cards, a radeon, 7 fans, a dvd drive, a cd drive, a cd burner, and 2 hard drives in this machine. it may very well be that this little 340 watt power supply is at it's limit. it is still weird that it runs at 1950 and won't even post at 1984. i guess i just hit it's limit.

[maxima88]

Try using the most relaxed memory settings.
Increasing your vcore to around 2v would also give you more mhz. What mobo do you have and see if you can do a volt mod.
I also agree that if you can lower your temps around 30c, you should be able to o/c to 2GHz.

[sendatooli]

yes, i know if i lower my temps it probably would. i did not want to get a new heatsink to gain 50 more mhz. i don't think the sk6 will run at 30c trying to get rid of almost 100 watts. will it?
if it will i am doing something wrong!
also, my mobo is volt modded. 1.840 is the most it will muster. it is supposed to do 2.25 with the mod. i guess my power supply is pooped. unless my power supply finds some more oomf and i figure out how to make my existing heatsink more efficient i don't think i will be seeing 2ghz with my current rig. if i can do it with what i already have please advise! my memory has no problem going 150mhz at ANY settings. it is pc2700 from crucial. but, it is 2 512 sticks. still, even at the lowest settings it wont even post at 13.5x multiplier x 147 fsb. which isn't even 2ghz!
i don't think the temps are the problem. it will not even post at 13.5x/147fsb when it is bone cold. but, runs 13x/150fsb fine at 46c. idle. it is at 46c. idle right now. runs fine under load at 50-51c. i know that is high.
i was wondering, how long do these things last if you can get over 2 volts on them? i am dissapointed i have to run 1.840 just to get 1950mhz.




thank you,
sendatooli.

[sendatooli]

yes, the problem has got to be heat. the temps have now risen 1 degree again to about 51c. under load. prime crashes immediatly.
can i lower the temps with my sk6 that i have, or do i need a new sink? it was just cnc machined(even flatter than lapping).



thank you,
sendatooli.

[Nebulous]

You're not the only one in your delemna. My AIUGA 1800 tbred needs 2v to get at present speed and even with water cooling my idle temps are 43c and full load are 49-50c. Anything under 2v on the core and it will lock. Not happy.


Looks to me like that psu you have is whimping out. Also try a smartfan II on that heatsink.

[sendatooli]

i just have real stinky luck. every cpu i ever bought i got "gipped" on. never have i had mine go as high as anyone elses. it is not me, it is just my luck.

i just got a way more powerfull fan for 5 bucks to attache to the sk6. i'll let y'all know if it does anything.

i was wondering is this http://www.pctoys.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=001&Product_Code=840556016038&Category_Code=HS-PCT any good? it has a 92mm fan. the only reason i would get this is because comp-usa sells it. to get a real good hs i would have to drive 2 hours and do not have the time right now. but if that zalman won't do the trick please let me know. nothing i hate more than throwing good money after bad! anyways it is $40 at compusa! for that money i could probably do better, right? and if i am going to need a new power supply too, i think i am just going to have to back it down to about 1800mhz for now. darnit! it would have been cheaper just to buy a real pr2400! but, then i'd have to go overclock that! hahaha.



thank you,
sendatooli.

[sendatooli]

ok, i have it down to 43c. under full load. prime95 poops out on the first test every time at 1950. given that, should i invest in a new heatsink? or does it sound like this particular chip just isn't going to make it? or do i need a power supply? like i stated above there is a ton of stuff on this power supply and it is a enlight en-8341934a1 340 watt. if the chip just isn't going to do this, i certainly don't want to go buy more stuff!



thank you,
sendatooli.

[Deathknight]

Cooling is probably an issue there. Don't overlook the other factors too though. What speed memory are you using? If you are pushing your memory to its limits you may want to go with worse timings.

Also if you do hit your chips ceiling you may want to lower the mult and increase your fsb. You may not be increasing the mhz of your chip but your machine will definatly benchmark better due to the increase bandwidth on the fsb.

[ChillPhatCat]

I don't consider it stable if it can't run prime 95 for even one set of iterations... After about 2 hours of prime I'd say it can be considered stable... I don't count unstable overclocks as legitamate myself. This is probably a result of not enough voltage... Look at my vcore at 1.96.. I had to up the stock core voltage by .21V to get 406 MHz.

[sendatooli]

i am at my maximum fsb of 150. i am at the maximum vcore my power supply/voltage regulators will allow. the memory worked fine on the highest settings at 150fsb with a pr1600. i backed the memory down to all the very worst settings. prime95 ran for 20 hours before pooping. what does this tell me? the highest temperture it hit while prime95 was running was 46c. the crucial pc2700 should certainly handle 150fsb at it's worst settings. unless the memory is going bad. i might try a newer bios.
the problem with prime 95 is it does not tell you what failed when it poops. i used passmark to find out the memory was the culprit at it's highest settings. at it's lowest settings of course passmark finds no errors. why did this memory work fine at 150fsb with the pr1600? 150fsb is 150fsb, right? i doubt it is even the memory at this point. maybe not enough voltage? it is a bummer that i can't even hit 2000mhz like everyone else! it's not like i am trying for 2100+mhz. i have never had any chip that went as fast as everyone else's!



thank you,
sendatooli.

[sendatooli]

after fiddling for a day i got the temps down to 35c. idle and 38c. under full load. i used a fan that draws about 1 amp to do this. so if the power supply is the problem this did'nt help. still, it will NOT post over 1950mhz! at least it is stable at 1950mhz.

o.k., so if you were me (and did not have much money) would you run out and get a new power supply, thinking this is why it will not hit 2ghz? or is it possible i just got lousy o/c chip. like i always do? i doubt that if when the machine is bone cold that it heats up that much so fast with this fan that cooling is the problem. so votes for the chip or the power supply is the culprit here?



thank you,
sendatooli.

[frostmoon]

Sendatooli, did you try to turn off some of your hardware ?

If I were you I would try switching off a dvd drive, cd drive, cd burner, one of your hard drives and maybe some pci cards to unload your PSU . Maybe with less load on PSU it can better supplay your CPU and you'll get your extra mhz... if it will be so you can consider buying new PSU if not i think its max for your CPU.

Good luck

Sorry for my poor english :)

[sendatooli]

thank you frostmoon. that is a good idea. do you think if i unplug everything it will be enough offload on the psu to see if that is the problem? or maybe the psu still won't do it? it is a 340 watt and has pretty good specs. it ran a pr1500 at over 1600mhz.
i'll try it. but, i'd hate to think it is the chip if it is still the psu even after i unplug all the stuff.
what temp in c. do you guys think i would have to get down to, to see this chip hit 2025? i am actually going to the store tomorrow if they are open and will get a heatsink. i was thinking slk800 with a 40 or 53cfm 80mm fan? should that do the trick? or is a slk700 enough? and also should i get a 530 watt antec psu? that stuff should be good? i know i said i wouldn't spend any money right now. but, hey it's christmas so i will get myself a present!

also, just thought i'd mention it is running at 35c. idle right now and 38c. load. it still will not go over 1950mhz. given that, should i even get the slk800?


thank you,
happy holidays
and
best wishes!
sendatooli.

[sendatooli]

i unplugged everything from the power supply. i left only 1 memory stick. it posts at 147fsb x 13.5(the highest it ever did) windows loads a blank screen. could it still be the power supply? i noticed that at 147fsb x 13.5 the temperature was 41c. in the bios. at 133fsb x 13.5 multiplier the temp is only 35c. idle.
if i set the chip to 14.5 multiplier x 138fsb (= 2001mhz) would that be a way to see if the problem is the chip? or does running 2001mhz on 138 fsb still take just as much wattage as running 13.5 on 147fsb?

if i was going to gamble on one or the other would you guys suggest i get a 540 watt psu or a thermalright slk-800 heatsink?
i can't really get both right now.

I thank all of you for all the help you have offered here.
sendatooli.

[Hardass]

Originally posted by sendatooli
my tbred 1800 is rock stable at 1950mhz. it will not even post at 2ghz! i have a sk6 and my 340watt ps is at the limit. it takes 1.840v(the highest i can go) to get it to 1950. i have the temps (down) to 50c. under full load. it is 76f. in this room. anything i might try to get over 2ghz without buying anything? or is the chip about at it's limit. or my heatsink and psu is the problem?
do most of these 1800's make it over 2ghz? if they do, i assume with better cooling and a bigger power supply than i have?
well 1950 is not bad. but i am only 50mhz shy of a nice round number. so it would be nice to hit it!
any tips or tricks are appreciated.



thank you,
sendatooli.
Not sure what mobo you are using, you might want to concider a vmod on the mobo so you can raise that vcore alittle more. That will get you more MHz, you won,t be going much higher with the temps your running now. Good luck!:)

[sendatooli]

i just noticed that at 133fsb x 13.5 multiplier my +5volt is at 5.0 volts in windows. at 150fsb x 13 multiplier (the highest it will go) the +5v. drops down to 4.94v. in windows and under load it drops to 4.90v. the 3.3v. always stays at 3.36 strange thing is that speedfan shows the -12v is .97v! but in the bios it says 11.96v. i guess speedfan just has a bug there. unless something is really wrong?

plus, 41c. at idle at 147fsb is too high i recon.

so does it look like i need a power supply AND a better heatsink?

any heatsinks and power supplys that will do the trick for low dolars? the slk-800 alone is $35 with no fan! i could get a volcano 7+, but ive heard they are lousy? any other suggestions?



thank you,
sendatooli.

[Hardass]

Since it seems you are getting lower temps somehow, you need more Vcore! If you can,t mod that mobo think about getting one with higher Vcore adjustment.

[Hardass]

Originally posted by sendatooli
i just noticed that at 133fsb x 13.5 multiplier my +5volt is at 5.0 volts in windows. at 150fsb x 13 multiplier (the highest it will go) the +5v. drops down to 4.94v. in windows and under load it drops to 4.90v. the 3.3v. always stays at 3.36 strange thing is that speedfan shows the -12v is .97v! but in the bios it says 11.96v. i guess speedfan just has a bug there. unless something is really wrong?

plus, 41c. at idle at 147fsb is too high i recon.

so does it look like i need a power supply AND a better heatsink?

any heatsinks and power supplys that will do the trick for low dolars? the slk-800 alone is $35 with no fan! i could get a volcano 7+, but ive heard they are lousy? any other suggestions?



thank you,
sendatooli.

These are not the greatest readings but they are far from the worst I,ve seen. 41c is not a bad temp at all my friend, 50c is getting up there. I think your ps will do for now, when your temps start getting into the 50,s it is indeed time to go for better cooling.

[frostmoon]

sendatooli,
I agree with Hardass, your voltage and temp readings are ok, it seems you need more voltage for CPU. Buying new cooler is wasting your money IMHO, you probably get few degrees lower temps but few is too small for your CPU to become stable.
If you have possibility to try your tbred on a mobo which can supplay more volt to CPU (maybe someone you know has one) it could give you answer.
Epox mobos (they can give over 2 volts Vcore) should be close in price with 540W PSUs, so you must decide which way to go. Considering your actual voltage readings, new mobo with more Vcore seems right way...IMO

[TheGame240]

For about what you would spend on a new PS or HS you could always just wait 3 months and pickup a T-bredB. I'd be much more confident in it hitting 2ghz than your current chip. If you want the really cheap way, then I would think a voltmod would be your best bet.

[sendatooli]

ok, i am going to volt mod! how many volts should i use? i have to chose a resistor for how many volts i want. a variable pot is too risky!
i honestly thought these tbred a's were hitting over 2ghz at like 1.75 volts? and like 2147mhz with 1.85 volts? it seems to me a lot of people were getting those numbers. is it not the norm for these chips to hit 2ghz at under 1.85 volts? anyways, it is important i know what the max voltage i can give it is! i don't want to fry it!

also, my temps are 38c. at idle with delta screamer. they will go up at 2+ volts. i want a quiet 80mm fan. so i will get a new hs tomorrow. i really do not wan't to spend $35 for the slk-800. could somone be real nice and tell me which heatsink to get for not too much money from kdcomputers.com? they are real nice guys and are only 1 1/2 hours from my home. so i can go there tomorrow! i hope someone let's me know, because after tomorrow they are probably closed untill 1/2/03!


i really appreciate all the help you folks have given me here. you guys are great! this board rocks!



thank you,
sendatooli.

[PCphreak]

sendatooli-
It's appearant your looking for more performance, but to gain a couple MHz out of your CPU will not justify spending even $35. However, rest assured your current heatsink and temps are NOT keeping you from 2 GHz AT THIS MOMENT...your definitely going to need 1.85v Vcore or a tad higher.
You can get this one of two ways:
1) Volt mod
2) Another motherboard

Now once you obtain this higher vCore, a better HSF will most likely be needed for stability.
....unless you get lucky and are stable @ 2GHz on 1.85v where your current HSF may still be able to cope with this. I wouldn't count on that though....

But, let me talk you out of spending anything more than .01 cent, to only get a few more MHz out of your chip. Because that $35 you can spend on a heatsink, or $95 on another mobo, will certainly not justify the negligible gain from a 50 MHz increase in the CPU.
You just will not notice the difference except in benchmarks.
You will just be better off saving for a more complete upgrade.


-PC

[sendatooli]

i will do the volt mod. i probably already have the 5 cent resistor in my parts drawer. it will take me 20 minuets to do. mostly the time of removing the motherboard.

as for a heatsink, i will need one either way. it is not stable without the delta fan, which i cannot stand.
so which heatsink could i get form kdcomputers.com that is around $20 that will do the trick? i really don't wan't to spend for the slk-800. but, the sk6 only really works with the delta fan and that has got to go!

also, what voltage should i go for? i only want to solder this once!
what is the maximum fairly safe voltage this chip will take with air cooling? i'd rather shoot for higher voltage if it can handle it then go lower and have to solder a different resistor.

my understanding was that these tbred a's had no problem hitting over 2ghz. was i wrong?





thank you,
sendatooli.

[maxima88]

I've used variable pots w/ all the volt mods I've done and have never ran into any problems. The pots give you a lot more flexibility w/ your voltage. Right now w/ my pot, I can vary my vcore from 1.89v to 2.29v. I also used a 2-position toggle switch so I can disable the overvolt function of my mobo and go back to stock vcore of 1.75v.

What I'm trying to say is that it's safe to use pots and other electronic equiptment as long as you know how to wire them.

G/L.

[PCphreak]

I have personal experiance with the SK-6, and I can say it's a great heatsink for the money. I would probably choose it, if I were in your position.
On air cooling or water cooling, I personally would not go any higher than 1.95v- possibly 2v. Like Maxima88 said: a POT would be better- but if all you have is a resistor, then I would limit the maximum voltage to 1.95 - 2.00 volts.

I've debated the voltage in this other thread here (http://forum.oc-forums.com/vb/showthread.php?s=&threadid=125561)


-PC



Originally posted by sendatooli
i will do the volt mod. i probably already have the 5 cent resistor in my parts drawer. it will take me 20 minuets to do. mostly the time of removing the motherboard.

as for a heatsink, i will need one either way. it is not stable without the delta fan, which i cannot stand.
so which heatsink could i get form kdcomputers.com that is around $20 that will do the trick? i really don't wan't to spend for the slk-800. but, the sk6 only really works with the delta fan and that has got to go!

also, what voltage should i go for? i only want to solder this once!
what is the maximum fairly safe voltage this chip will take with air cooling? i'd rather shoot for higher voltage if it can handle it then go lower and have to solder a different resistor.

my understanding was that these tbred a's had no problem hitting over 2ghz. was i wrong?

thank you,
sendatooli.

[sendatooli]

i have an sk6 on it right now! unless i use the delta screamer the temps are unacceptable! i have lapped it. with a 80mm fan mounted sideways it runs even hotter for me! what can i do to this sk6 to get the temps good, if anything? if not someone please advise on an inexpensive hs form kdcomputers.com.
the sk6 is at 39c. idle at 1800mhz and 1.840 vcore. at 1950 it is at 43c. idle. without the delta fan it is at 46c. 51c. full load. at 2volts it will be way too hot!

i decided to use a 18k ohm resistor. that will put me at 1.96-1.98volts with the bridges painted. this cpu comes stock with 1.6 volts. it is a tbred not a palamino! i hope i don't smell smoke when i boot the first time! that will royaly suck!

also, i can think of a lot of reasons not to use a pot for this application. i'd like to hear why you think it is better besides the fact that it will let you decide what is the lowest voltage possible to get it going. if a pot is better, i just pulled like 8 of them that are suitable for this. so i have them ready!



thank you,
and
happy holidays,
sendatooli.

[MDA]

I think your temps are the issue. 50c is high. My tbred a wouldn't overclock with temps that high either. I reseated my heatsink and got temps around 35c and i get 2ghz no problem.

WOW!! Could you please let me know your ambient room temps and core voltage @ 2ghz, cos 30c idle and 35c load is way good for air!! Sorry to sound scepticle, but ive just installed my Water setup and when i see people getting figures like this, i feel a little upset!:(

I get 40c idle and 47c load for my Tbred A XP2200+ @2Ghz Vcore=1.9v

MDA.

[sendatooli]

pcphreak, i saw in that thread you pointed to the experts concured that the maximum for that chip is 1.85v! but, you said here, maximum 1.95-2.00 volts. if i go 1.96-1.98 am i pretty likely to smell smoke the first time i boot? i have had that happen before and it sucks!
i don't care if it only lasts a few monthes. if it only lasts 10 minuets that is a different story! if 2.00 volts is known to be lethal i'd rather not try it. i realize electromigration will eventually take my chip at these voltages. on the other hand i hope what i am doing here is not like hooking up a am radio that takes two aaa cells to a 12v. car battery! ok, that was a dumb analagy, but you get my point.




thank you,
sendatooli.

[TheGame240]

I personally think a pot would be much better/safer for the volt mod. That way you can turn it up to full resistance and not have to worry about accidently running 2.3v+ through your CPU. Also if you set it to 1.95 and you don't get 2ghz you have to change resistor instead of just turning a dial. And you might get 2ghz but in reality you only needed 1.85 so you have your 2ghz but you also have the headaches of keeping an overvolted chip cool. Not to mention the unnecessary strain you'll put on your chip. But it's completely up to you.

I've noticed through reading sigs/posts that the lowest voltage for 2ghz seems to be 1.85. I can only hit 1.8 stable with my 1800+ T-Bred and 1.9 will boot into windows, but fails Prime. I'm limited to 1.75v by my MB (A7N8X), but I figure another 200mhz really isn't that important. Also I can turn the fan down and drop the voltage to 1.70 so it's cool and silent.

If you decide to upgrade HS, I remember the SK-7 being on sale for 19.99. I can't remember where, but you might find a good deal on it. I'd suggest getting a Thermaltake Smartfan. Goes from like 5000RPM-1300RPM and puts out from 75CFM to 20CFM. And even at full tilt it'll still won't be as loud as the Delta.

[sendatooli]

a resistor or a pot does not make any difference in my situation. i will need at least 1.98v and i will not go higher than that.
the pots are far from linear, so since i want 1.98v and am already at 1.840 a pot isn't really nescesary in my situation. also, i do not see any pots with axial leads. if i add wires to the pot to connect to the ic it will surely add inductance and capacitance to the logic gate. with this p.o.s. board that will not be good. a pot being a wire wound will also add parasitic interference. unless i use a sealed audio pot ($35), it may also add fm! not too good.
yes, i do recomend a pot for this application where it can be of use. for me it would be of no use. since i would run a resistor in parllel with the pot anyways. a 50k ohm pot could easily put me at 2.3v +/- 5%. yikes! so since i would limit it to 2.00v anyways and i figure it is 1.98v or bust. i might as well cut to the chase and just apply the 1.98v! well if anyone can point me to a pot with an impedance that will not allow more than 2.00v. with an existing 1.840 with no fixed impedance resistor across it and axial leads please feal free to tell me! whew, thats a tall order for a pot! like a triple pickle sandwhich, lol.

as for the heatsink, anyone else think the sk7 will do the trick?
i will use a quiet sunon 40cfm 80mm fan with it. the price fits the bill.

you guys were right on. my problem is definatly my vcore.
my psu is a very strong little 340 watter and not having a problem yet.


thank you,
sendatooli.

[PCphreak]

Right, the maximum voltage per engineering spec is 1.85 volts. Sometimes in order to squeeze that last 100 MHz out, setting vCore a tenth or two over 1.85 may be needed.
While, in most cases, 2 tenths over max spec may not result in immediate destruction (including fire balls and lighting bolts:) )- it still is over max spec though. This results in increasing damage to the interconnects since the current density is now higher, then what it was engineered to sustain.
Anything over 1.85 is a risk.
But what I'm mainly getting at is:
1.95v is closer to spec than 2.0v....and anything over 2v is asking for trouble in the short-term.
Statistically you most likely will not see any short term problems with the CPU at 1.95v.
Consider too, if the power supply regulators on the motherboard are of poor quality- the extra wattage being drawn may cause issues or failure to the reg circuit itself. Unless there is an over-current sense circuit in place to shut it down.
There could also be a possibility of the regulator circuit not being able to provide enough current period for anything over 1950 MHz. I don't really know, as I've never heard of anyone running 2 GHz on a ECS SiS 735 board.

The only way to find out is by do the voltmod....

Good luck & post back...


-PC


Originally posted by sendatooli
pcphreak, i saw in that thread you pointed to the experts concured that the maximum for that chip is 1.85v! but, you said here, maximum 1.95-2.00 volts. if i go 1.96-1.98 am i pretty likely to smell smoke the first time i boot? i have had that happen before and it sucks!
i don't care if it only lasts a few monthes. if it only lasts 10 minuets that is a different story! if 2.00 volts is known to be lethal i'd rather not try it. i realize electromigration will eventually take my chip at these voltages. on the other hand i hope what i am doing here is not like hooking up a am radio that takes two aaa cells to a 12v. car battery! ok, that was a dumb analagy, but you get my point.




thank you,
sendatooli.

[sendatooli]

tomorrow evening i will use a resistor that will provide me with 1.976v. if it does not work i will forget about going over 2ghz. i was actually going to try 2.07v. but i have now cowered out! i saw folks running 2.3 on it WITH water. even with water i think those will be real short lived chips. these are tbreds not palaminos! they come at 1.6v. and have smaller dies and handle less maximum wattage!
as for not using a varible pot, there are lots of reasons for not doing that i stated above. another reason is, do you really want to be twiddling a screwdriver on top of your motherboard while it is powered? even if you do not slip the metal driver and ground something out or over turn or fail the pot there is still the issue of sag and ripple introduced by regulating voltage to the op-amp while power is applied. these are NOT analog circuits we are talking about here! i know other people feal differently about using pots for this, but on my own board i won't do it. if you do, please be carefull! and for sure do a good solder job! i'd hate to see someone ground the regulater ic! ok, sorry to be a pooper! just my 2 cents.


now, in the morning i will pick up a sk7. as i will be needing this to run this voltage! i hope the sk7 is a good choice for a 40cfm fan. the slk800 is too darn expensive. and if you compare the gram weight they are not that far off, so i hope it does the trick.



thank you,
sendatooli.

[Spacemonkey]

My two cents. Try lapping that SK6 and unlock that 1800. :):)

[sendatooli]

the 1800 is unlocked!
i decided to go with a potentiometer anyways. i limited it to 2.1v max and did not excede 2.00v before my psu took a dump.
i tried running 1.95 volts through it. almost got into windows! power supply could'nt do it! it went down to 4.74v. on the 5v. rail at 1.95vcore! before i could hit the power switch the thermal cut out came on! thank goodness for that!
well, i could try the giant psu from my dual mp machine before i get another one. but, i am wondering what kind of giant psu i would need! how many amps do i need on 3.3v and 5v combined output etc. if i wreck the psu from the mp machine i am s.o.l. so please let me know what specs i need before i do that! it is a $160 psu!


right now i am really miffed! i got an slk-800 this morning. it is running 10 degress HOTTER than my sk6! what the.....?
i think i installed it right, this is b.s.! what should i do to it to make it work the way it does for everyone else? i am only using a 40cfm fan, is that the problem? this is crazy i am at 50c. idle, it is not over clocked or overvolted right now!

i also think i really hurt the psu with that trick because it smells bad now and i hear the fans sppeding up and slowing down. ahh well, don't try this at home kids:)!



thank you,
merry xmas,
sendatooli.

[Vertical_Zer0]

Leave your computer on for a few days to let the thermal paste "sink in" and then you'll be getting nice temps. They usually just have to settle into a good spot after you install a new one. Is the thermal paste arctic silver 3? They say it takes about 72 hours or so for that stuff to settle in.

[PCphreak]

Just curious, what brand is that PSU you 'smoked':D?
For reference, I have a Antec 352x- it's 35O watt...but the important rating is the combined 3.3v & 5v rail of 180 watts.
The individual ratings are:
3.3v : 20amps
5v : 33amps

I am running 2 GHz on a EPoX 8KHA+ W/ H20 @ 1.85v.
This chip @ 2GHz is very sensitive to temperature.
All is well, as long as the water is kept cool (60* - 70*F) which corresponds to a CPU temp of 75* - 80*F....but once the chip gets into the mid 90*'s or so, stability is non existant on heavy usage.
To keep this chip stable (2 GHz) at 95*F, I will either need ~.10 > in vCore, or a constant temperature lower than 90*F.

But this chip is an (.18) AGOIA 13th week core. Your chip has a higher wattage output per square area & yeilds on the chips aren't as high since they just recently were inrtoduced...so you *may* or *may not* be stable at 2 GHz with aircooling no matter what you do. I'm just speculating though. Only way to find out, is by sticking in a more robust PSU.....as long as you voltage mod isn't shunting against any other pins, then I would say the PSU from your MP rig is a perfect test canidate....
As far as the SLK-800 is concerned, what type of thermal compound are you using & is it lapped?

-PC

Originally posted by sendatooli
the 1800 is unlocked!
i decided to go with a potentiometer anyways. i limited it to 2.1v max and did not excede 2.00v before my psu took a dump.
i tried running 1.95 volts through it. almost got into windows! power supply could'nt do it! it went down to 4.74v. on the 5v. rail at 1.95vcore! before i could hit the power switch the thermal cut out came on! thank goodness for that!
well, i could try the giant psu from my dual mp machine before i get another one. but, i am wondering what kind of giant psu i would need! how many amps do i need on 3.3v and 5v combined output etc. if i wreck the psu from the mp machine i am s.o.l. so please let me know what specs i need before i do that! it is a $160 psu!


right now i am really miffed! i got an slk-800 this morning. it is running 10 degress HOTTER than my sk6! what the.....?
i think i installed it right, this is b.s.! what should i do to it to make it work the way it does for everyone else? i am only using a 40cfm fan, is that the problem? this is crazy i am at 50c. idle, it is not over clocked or overvolted right now!

i also think i really hurt the psu with that trick because it smells bad now and i hear the fans sppeding up and slowing down. ahh well, don't try this at home kids:)!



thank you,
merry xmas,
sendatooli.

[sendatooli]

i am typing this at 2100mhz!
stable too!
14x150fsb@1.952vcore. unfortunatly i am running a tornado f5 on the slk-800 at full blast. i can't stand the noise for much longer! i already have a head ache!
my only question now is, what is the minimum wattage resistor that can be used on a fan that draws .76 amps? also what impedance resistor should i use to quiet it down but not make it go TOO slow?
i really just wanted to see if i could hit 2025mhz. i am going to back it down now. it was stupid because i paid $32 for the chip and then spent almost $200 on a heatsink, fan, and power supply.
i know the topic of this thread was "spend no money" ahh well. i am sure you people can have empathy with me! it's just the thrill of overclocking. if anyone should understand it should be you guys and gals! now i just have to get an intel so i can go over 4ghz! lol! (just kidding :)).



happy christmas everyone!
sendatooli.

[PCphreak]

MERRY X-MAS!
You could always use a POT to dial in the fan....
Well congrat's on your overclock...
You could look at your new PSU being able to accompany your next upgrade....but sometimes you can't get around spending money...


-PC

Originally posted by sendatooli
i am typing this at 2100mhz!
stable too!
14x150fsb@1.952vcore. unfortunatly i am running a tornado f5 on the slk-800 at full blast. i can't stand the noise for much longer! i already have a head ache!
my only question now is, what is the minimum wattage resistor that can be used on a fan that draws .76 amps? also what impedance resistor should i use to quiet it down but not make it go TOO slow?
i really just wanted to see if i could hit 2025mhz. i am going to back it down now. it was stupid because i paid $32 for the chip and then spent almost $200 on a heatsink, fan, and power supply.
i know the topic of this thread was "spend no money" ahh well. i am sure you people can have empathy with me! it's just the thrill of overclocking. if anyone should understand it should be you guys and gals! now i just have to get an intel so i can go over 4ghz! lol! (just kidding :)).



happy christmas everyone!
sendatooli.

[sendatooli]

alright, which pot should i get at radioshack? there open till 7!
the only ones i saw there were .5 amp, a .76 amp fan would surely kill that, right?
also, i am afraid that the psu might not do my next upgrade! and, it is already 550 watt! i tried 2.3vcore just for a second(i know, stupid!) and the psu went down to 4.845 on the 5 rail. that is too low right? although, the newer the cpu's get, the less voltage they are going to take, right? so i guess it is not a problem.


thank you,
sendatooli.

[sendatooli]

well, the tornado will not start with over 10 ohms applied to it.
with ten ohms it is at 3900 rpm. i don't know how other people 7 volted this fan, because it will not start at 7 volts for me!
anyways at 3900 rpm it is way too loud still. any lower i might as well use a different fan anyways.
am i just running too much vcore to keep it cool with a quiet fan?



thank you,
sendatooli.

[sendatooli]

whew! after about an hour the 10 ohm resistor went up in smoke!
that is one strong fan.

now that i installed all my pci cards (5) plus 7 fans the power supply is down to 4.945 on the 5v. rail. it will not load windows with all the pci cards in at 2100mhz. the best it will do is 2025mhz at only 1.888vcore. i think this is the largest power supply availble in the consumer market. antec 550 watt. is it the power supply limiting me from getting into windows at 2100mhz when it falls to 4.945v? or is it my pci cards? these pci cards have been run at 150fsb. i think it is the power supply. but, going over 550 watts is too scary. if something goes wrong with that rig is can be pretty dangerous. i have a home and a family, so i better not mess with more than this. if you guys think it is ok to get an even bigger psu and just crank it let me know.
yeah, i'm on the crazy train again!






ok, i figure y'all are busy enjoying christmas......i better go do that too before it is over!



merry christmas,
sendatooli.

[sendatooli]

now i am wondering why i sepnt almost $200 us. on a heatsink,grease,fan and psu. i could have bought a faster cpu that was more stable and cheaper! or i could have just gone intel and joined the 3ghz+ crowd!
ahh well.



sendatooli.