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CPU Overclock = Choppy game

N

Nova8

Weaksauce
Joined
Nov 1, 2006
Messages
72
I usually run my e6400 at 375*8 at 1.325vcore and 2.0v ram. Today I tried to bump it up to 400*8 to hit 3.2 and it loads fine and I test it and no errors. But when I load up c&c kane's wrath it is all choppy, graphics sound menus everything. When I run at my usual 3.0 I have no problems at all so I don't understand why a cpu overclock would make the game perform worse. I've tried messing with voltages... I moved my vcore to 1.45 and ram to 2.1 to see if that would help but it didn't. Can anyone help me figure out what im doing wrong?
 
You aren't stable. Your northbridge might be overworked and need a voltage or cooling bump. Your cpu might outright not be stable, try Orthos tests or something similar and see if you can pass it for a few hours. Your CPU might be stable but your system as a whole isn't. Did you lock your PCIE bus?
 
Yeah I have the pcie locked at 100. Im running a p5b deluxe, thermaltake big typhoon, buffalo firestix d9s. CPU needs like 1.54 to run 3.2 so it gets really hot (60c but usually not higher than that). Any ideas? Is it possible that heat would be causing it?
 
Yes, heat can cause that. I've seen the same happen when OC a video card and it starts to overheat.
 
I've seen this first hand as well. When I overclock to 3.8 ghz, i can run 4 prime 95's fine, an pass a few hours of it. As soon as I launch UT2k4, and start to play, its all jittery, and the sound cuts in and out and crackles, and everything. If I back off my overclock to 3.7, its fine, no problems of this nature at all.

Its definately, not a videocard issue. Id be currious to know what causes this, cause if I could figure it out, I would go back to 3.8ghz.

Nova, what CPU do you have and what motherboard and videocard?
 
Xenozx said:
I've seen this first hand as well. When I overclock to 3.8 ghz, i can run 4 prime 95's fine, an pass a few hours of it. As soon as I launch UT2k4, and start to play, its all jittery, and the sound cuts in and out and crackles, and everything. If I back off my overclock to 3.7, its fine, no problems of this nature at all.

Its definately, not a videocard issue. Id be currious to know what causes this, cause if I could figure it out, I would go back to 3.8ghz.

Nova, what CPU do you have and what motherboard and videocard?
Click to expand...

While the CPU and RAM are stable at that frequency/divider, something else (probably northbridge or southbridge) is unstable. Try bumping their volts
 
Nova8 said:
Yeah I have the pcie locked at 100. Im running a p5b deluxe, thermaltake big typhoon, buffalo firestix d9s. CPU needs like 1.54 to run 3.2 so it gets really hot (60c but usually not higher than that). Any ideas? Is it possible that heat would be causing it?
Click to expand...

Lock the pcie at 101 or 102, you may have better luck
 
just back off on the OC a little see if it helps. Plus your system will not see that much of an increase from 3.0 to 3.2.
 
Nova8 said:
it loads fine and I test it and no errors.
Click to expand...

I know some people say that if they can play a game, or even just start windows, they consider this to be a sufficiently rigorous "test" to consider their overclock to be stable.

That is their opinion, but not mine.

You should stress test that overclock for at least 12 hours (all cores), preferably a lot longer, before even considering calling it stable.

As others have said, you've probably got an unstable overclock.
 
Xenozx said:
Nova, what CPU do you have and what motherboard and videocard?
Click to expand...

I have an e6400 on a p5b deluxe and an 8800gts g80 + hr03 plus so temps on that are very low.

I guess ill try bumping the nb and try locking my pcie at 101 and see if any of that helps.
 
I used to have the same mobo, CPU and video card. Have you tried setting the FSB to 401Mhz instead of 400Mhz? Also, have you checked using CPU-Z or anything similar to verify you're not running your PCIe link at x4? I know that my system would act strange when I first overclocked at 3.2Ghz. I checked and the link was x4 instead of x16. I bumped the FSB to 401, the PCIe bus to 101 and there was something else I had to do as well. Possibly it was bumping the NB voltage or something. I don't honestly remember. Anyway, try that and good luck!
 
have you done a mem test?

If I were you I would try to lock that bitch up. Run Prime and orthos, then convert an AVI to DVD then Burn a dvd and then kick off 3dmark06 on top of all of that.

If it's not stable is should show it.
 
Well I checked cpu z and found out that my pcie link was at 1x instead of 16x so I tried locking my pcie at 110 and my fsb at 401 and things are running smooth as silk! Thanks everybody for your help.
 
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