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FSB limiting Overclock

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Looking good! I don't want to discourage you from trying to push it any further, but as it's been mentioned before 254 bus speed off that board is fantastic! And unfortunately it could be nearing the top end of it, if not already there.
theflyingrat said:
If it stops at a certain HTT bus speed, even after lowering the CPU multiplier, you've got one of two problems.

a) That's as far as the motherboard will stably operate the CPU. There is a point where the HTT speed just can't be pushed any further without losing its signal integrity.
b) Your memory has hit a wall; you'd usually have to lower the memory multiplier to keep it within its operating spec.

To be honest, 253HTT is way faster than a micro-ATX board with a skimpy 3-phase VRM, based on the dumpy GeForce 6150 chipset has any right to go. Lots of these won't ever go higher than 220HTT before something goes stupid. On top of that, the power circuitry on the board will only support a 95W CPU, so overclocking will never be its high point to begin with.

But before giving up on it, check your memory and HT Link multipliers. If you can lower both of these and it still won't clock up, you're simply motherboard-limited, something that I wouldn't see as a surprise one bit.
Click to expand...

Rat sums it up pretty well in this post, and what you managed to get out of that board is great to what the typical results were for it. The one thing that you can still do, and I'm not sure if you're waiting for the new heatsink to do it, but try pushing it upwards of 1.42v or 1.45v.. or more if you can keep the temps down. With the new heatsink cooler it should be able to handle what extra heat comes out and see what extra speed you can squeeeeeze outta her. :p
 
Latest cpuz http://img13.imageshack.us/img13/2665/screen02dx.jpg

Still can't get it above 253 but it seems stable right now. I can't fully be sure its not temeture issue till I get my new cooler but I think its the only thing it could be. I never see it go above 50c but I guess it could. Changing the ram helped a lot and I can't boot it at 253 without lowering the ht to 3x. I feel like most of my setting are right now since before it was not stable at this speed until I made these changes. What about the voltage on my memory(1.8v) and chipset(1.34v) or bank cycle time on the ram(one setting I did not change) . I need to run another stablity test to be sure that this runs ok now. What else is can I change?
 
:welcome: to Overclockers.com!


Here's a good outline of how to test your individual components with a cheat sheet summary in post #26:
http://www.ocforums.com/showthread.php?t=555058


I have a few questions/suggestions/comments in regards to your progress so far - and this thread was a lot of reading in one shot so please forgive me if I ask about an already answered question! ;)

1. When you tried turning your RAM speed down earlier did you have the timings manually set to the 333 MHz values (5-5-5-15)?

2. Is the vDIMM (RAM voltage) set to 1.8v manually? If so you might try 1.9v - shouldn't hurt anything even for Kingston.

3. You still need to lower your HT Link speed. When you're above 250 MHz on the clock you should be at 3X.

4. Is the 50°C on CoreTemp your current load temp at 253 MHz? If so you may still need a little more vCore and your cooler should be able to handle it. Try 1.45v and see where that leads. Be sure to test load temps at your present speed before going farther.

5. What PSU (power supply) are you running? You've got a good video card but is there a good PSU pushing it with enough left over for OC'ing?


Great clocks so far! :thup:
Now let's see if we can squeeze the last little bit out of it. ;)

EarthDog said:
Where is QuietIce when you need him... :)
Click to expand...
Sitting at home playing Dungeons & Dragons Online! How you'll have to excuse me for a couple of hours I've got some Hill Giants and Minotaurs to kill ...! :D
 
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1.Parad0x420 sugested putting my ram at 533 5-5-5-15 it would not post.

2.Yes its set to 1.8v, I will try raising it to 1.9v

3.My ht is set to 3x right now, that was bobnova's sugestion and the only reason my computer is stable at 253 fsb.

4.Yes, I will try raising to 1.45v.

5.I think its 500w psu but I will have to confirm that later.

My computer ran all night without shutting down at this(before I came here I could not keep my computer on for more than 2 or 3 minutes at this speed before it crashed)
http://img99.imageshack.us/img99/9176/screen01um.jpg
 
The brand of PSU is important, as well as the 12v rating on the sticker on the side of it.
 
gothpyre, that is a G1 brisbane and 2.7 could be where you will top out at as the G1's were much less OC friendly than the G2's. Since it is a G1, i would say with your new cooler shove that vcore to 1.5v, even up to 1.55v and see if you can get any higher.

Since you are multiplyer locked upwards and need a high HTT/FSB to get your oc speed, you really need to see what your ram and board can do. Drop your CPU multi down to like 4x that way you elimenate the cpu speed as a factor that will hold you back. You already have some info on timings and voltage at some multipliers to get as far as you have gotten, just focus on getting past the 253 barrier you are at.

Look through your bios and see if you can find the voltage control to your north bridge and bump it up. Even though the IMC is in the cpu when you run at high htt speeds more voltage to the north bridge can make your oc more stable and allow you to get further.
 
Save your time - the PSU data is not that important.

At this point you're quickly running out of thermal space for OC'ing with your CPU running 54/58°C at load. I'd stop here and wait for better cooling ... :)
 
How did you know that was my load temp? Your exactly right though, I'm hoping my cooler will be here in a week. Do you think I could be getting temperature spikes that cause the bios to freeze? I have the shutoff temp at 75c.
 
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I just broke the 253 barrior. I lossend the timing from 105ns to 123ns on the ram, raised the cpu voltage to 1.44v. Is this good or bad, and will it hurt my ram. What should the ht width be 16 by 16 or 8 by 8.
 
Loosening timings won't hurt anything. Heat and voltage are the killers.
 
http://img254.imageshack.us/img254/6784/screen01p.jpg look look, it was the ram and the ht multiplier that was holding it back and also the volts. Thank you guys so much, your my hero's, I passed the barrior and then some. I think I finally understand overclocking. For 2 months I have been stuck at 253 and in 24 hours with all of your help I did it. Thank you Parad0x420 and Bobnova you where here the hole time helping me, I could not have done it without you two, and thanks everyone else.
 
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So does everything look safe(as safe as overclocking can be) I don't want to raise it any higher till I get my cooler(cause load is going to 61c on stock cooler) but Im at 2.71 I think I can get 2.8 with my cooler, 2.1 to 2.7 I never thought I could do that, and maybe more....................just maybe;)
 
I would have stopped at 55°C but I've run a CPU for a few months at 60°C and since yours will be an even shorter time than that you'll probably be OK ...
 
I would back that OC off and get that voltage down a bit so that your max load is mid 50s. The MAX temp for those chips is 65C, so wait till you get your new cooler before you go gang busters.
 
I already did, I'm not going to burn my chip, my cooler will be here soon enough.
 
gothpyre said:
http://img254.imageshack.us/img254/6784/screen01p.jpg look look, it was the ram and the ht multiplier that was holding it back and also the volts. Thank you guys so much, your my hero's, I passed the barrior and then some. I think I finally understand overclocking. For 2 months I have been stuck at 253 and in 24 hours with all of your help I did it. Thank you Parad0x420 and Bobnova you where here the hole time helping me, I could not have done it without you two, and thanks everyone else.
Click to expand...

Congrats! :clap:
And you're most welcome.. been a little while since I've had to use my brain and think about OC'ing something like that. :D

It's about time QI decided to pop in here. Bob and I have been waiting, oh lord of s939 OC'ing. :salute:
 
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