View Full Version : Beginner OC wanting simple OC
I have a p3 650 that runs on a 100mhz bus. My mobo has jumpers to set the bus speed at either 66,100,133. If I buy 133 mhz ram, will processor run safely at 133mhz? I already have a 5000 rpm fan on cpu.
Tachyon
05-11-01, 09:01 AM
There's no guarantee that you'll get 133. Take a look at the CPU database here and see how others have done with the same chip.
[OC]_SR20DE
05-11-01, 10:31 AM
I suspect that's a copper one right?.. yeh you can go higher than 133. it is true that it's not guaranteed but you'll likely be able to run it safely at 133 or higher. Keep the ambient temp coolllllllll You can also get PC100 RAM and some of them can do 160mhz fsb cas3, hehehe... so PC133 is not the only ones that will run 133mhz bus.
Well, I have tried and can not get past 112 mhz fsb. If I try to set it to 124 mhz fsb, monitor shuts down and I have to clear my cmos to get back up. What could be the problem here? I am confused, my vc is a geforce 3 so I think it can go to 133, and I have 2-256M 133mhz sdram. Is it possibly a voltage problem?
Any advice helpfull.
btw, system info
Mobo is Elitegroup p6vxa
cpu P3650
2-pny 133mhz 256M sdram
Visiontek geforce 3 64ddr Videocard
Kingston 10/100 network card.
I have installed latest 4-1 drivers for via chipset.
up the voltage...have you done a burn in? you should try running it back at 100 with a higher voltage for awhile, making sure your temps are okay in the process
logos (May 17, 2001 03:00 p.m.):
up the voltage...have you done a burn in? you should try running it back at 100 with a higher voltage for awhile, making sure your temps are okay in the process
Im not sure what a burn in is, I have been running at 100mhz with seti@home running constant for several months.
burning it in is upping the voltage and then running seti/ benchmarks etc. usually the cpu will need more v as you overclock higher - a burn in can have several different effects, ie after burn in requires less v at lower fsbs, can take higher v and fsb, can run at higher v with lower temps, or it may not help at all. you never know...
don't count on a burn-in though working though, whilst some people will swear by them I think the results are usually exagurated, I beleive it is a coppermine core cpu you have (they stopped the katmai core at 600mhz) so theres a chance you may get to 866mhz but nothing definate. you will moe than likely need extra voltage, just stay below 2v and better cooling may be needed, is it an fc-pga socket chips or secc slot chip? you should also consider better cooling, if it's a socket chip then I recomend the Global win QBK 38, if it's a slot chip I recomend the Global Win VOS 32+
Phil (May 17, 2001 03:43 p.m.):
don't count on a burn-in though working though, whilst some people will swear by them I think the results are usually exagurated, I beleive it is a coppermine core cpu you have (they stopped the katmai core at 600mhz) so theres a chance you may get to 866mhz but nothing definate. you will moe than likely need extra voltage, just stay below 2v and better cooling may be needed, is it an fc-pga socket chips or secc slot chip? you should also consider better cooling, if it's a socket chip then I recomend the Global win QBK 38, if it's a slot chip I recomend the Global Win VOS 32+
It is a coppermine fcpga chip. I have a 5000 rpm hsf thats rated for a athlon 1.3ghz processor, still need to up the cooling?
Do you have a link to where I can get teh Global win QBK 38?
Kwho (May 17, 2001 04:15 p.m.):
still need to up the cooling?
do you have a way of checking temps? it's really the only way to know. i have never been held back by heateven with a retail hsf, so your hsf might be fine...do you know specifically which one it is?
e laursen
05-17-01, 05:27 PM
Actually, this might be simple. Did you change the PCI and AGP dividers? At 124, the PCI buss is running at 41MHz, which is screaming. It MAY be the rest of your system, not the processor, that is freaking out.
BTW, didn't see if you are using PC100 still, that would also cause a prob...
logos (May 17, 2001 05:09 p.m.):
Kwho (May 17, 2001 04:15 p.m.):
still need to up the cooling?
do you have a way of checking temps? it's really the only way to know. i have never been held back by heateven with a retail hsf, so your hsf might be fine...do you know specifically which one it is?
Yes, I have dl and installed motherboard monitor 5, as I type, my temps are cpu=27-36c and environment is 28-38c. CPU fan is an anteck twister.
e laursen (May 17, 2001 05:27 p.m.):
Actually, this might be simple. Did you change the PCI and AGP dividers? At 124, the PCI buss is running at 41MHz, which is screaming. It MAY be the rest of your system, not the processor, that is freaking out.
BTW, didn't see if you are using PC100 still, that would also cause a prob...
I am now using pc133.
No, in my bios I have no way of changing the PCI and AGP dividers, any utilities that would grant me access to these?
your motherboard must change the dividers automatically. burn it in first then try out the higher fsb's. put it back to 100, and up the voltage incrementally, checking temps as you go so you don't fry the cpu. when you max out the voltage, usually around 10-15% over default, run seti etc. like you have been. after a day or two start playing with the higher fsb's again. burning in usually helps; could take hours, days, weeks, or it may not help at all if your cpu just does not want to go higher. you have not mentioned what motherboard you have...
Shadow рс
05-18-01, 07:33 AM
actually I've yet to see a mobo change devisiors automatically.........they're all manually set as far as the one's I've come across.
logos (May 18, 2001 02:15 a.m.):
your motherboard must change the dividers automatically. burn it in first then try out the higher fsb's. put it back to 100, and up the voltage incrementally, checking temps as you go so you don't fry the cpu. when you max out the voltage, usually around 10-15% over default, run seti etc. like you have been. after a day or two start playing with the higher fsb's again. burning in usually helps; could take hours, days, weeks, or it may not help at all if your cpu just does not want to go higher. you have not mentioned what motherboard you have...
My Mobo is EliteGroup p6vxa
I wouldn't bother trying a burn in at this stage, you mentioned the cooler and it's rating but not the make, thermaltake rates it's super orb for 1.5ghz tbirds, but unless you want your tbird running at like 60-70oC then it is obviously not suitable. getting a 600 coppermine to 800 should be fairly simple, maybe with a little extra voltage (just keep under 1.9v) what board is this you are on?
Since I cant get my processor oc'd to a decent rating, Im just gonna rebuild with a new one. Gonna get a abit vh6-II with a p31000mhz. Thanks for all the replys and help.
A much better and cheaper combo for overclocking is the 1ghz AXIA or AVIA tbird and an Iwill k266-R which will get you 1.4-1.6ghz, or better still wait for the palamino core to come out which I would estimate would get between 1.5-2ghz
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