Overclocking CPU Gives 6800GT Artifacts???

[CAndrade]

Hey

Ok, I have done a volt mod and bios flash on my 6800GT --> Ultra, which runs fine, no problems, no artifacts.

Now i want to overclock my system. I went from 2.2Ghz to 2.5Ghz (3500 AMD). Everything is running fine and stable in windows and prime95.

Now once i run 3dmark with my CPU AND GFX overclocked, i start getting major artifacts and pauses.

1. I have tried setting AGP to 66 and 67 (67 is apparently a lock?) in bios.
2. I always have faswrites turned off
3. Tried Different Drivers.
4. AntiVirus Off

What I dont understand is, these two overclocks by themselves run great and are stable, but once i try run them together, i get artifacts in any games or 3d applications such as 3dMark. I should be able to run them together? Any Suggestions?

Thanks

System Specs:
3500 AMD 64
1 Gig Corsair Ram XMS 3200
Gainward 6800GT @ Ultra
480 Watt Antec SmartPower

 

[mOeeOm]

Originally posted by: CAndrade
Hey

Ok, I have done a volt mod and bios flash on my 6800GT --> Ultra, which runs fine, no problems, no artifacts.

Now i want to overclock my system. I went from 2.2Ghz to 2.5Ghz (3500 AMD). Everything is running fine and stable in windows and prime95.

Now once i run 3dmark with my CPU AND GFX overclocked, i start getting major artifacts and pauses.

1. I have tried setting AGP to 66 and 67 (67 is apparently a lock?) in bios.
2. I always have faswrites turned off
3. Tried Different Drivers.
4. AntiVirus Off

What I dont understand is, these two overclocks by themselves run great and are stable, but once i try run them together, i get artifacts in any games or 3d applications such as 3dMark. I should be able to run them together? Any Suggestions?

Thanks

System Specs:
3500 AMD 64
1 Gig Corsair Ram XMS 3200
Gainward 6800GT @ Ultra
480 Watt Antec SmartPower

Well compare the temps of them alone and then when you combine them...if there is a gigantic difference, theres your problem. You just need better cooling if that is the case OR turn down the overclock on either, most likely the CPU.

 

[CAndrade]

The temps are fine.

Im running a Hyper 6 cooler with 2 x 8cm Fans

And the Zalman Fatality Cooler on my VGA.

The artifacts start AS I START 3dmark 05's first test - even before temps go up.

My CPU runs at 48 on Full Load
VGA on 69 on Full Load

 

[Fern]

Hi CAndrade and Welcome to the Forums!


EDIT: Nevermind the below. I just re-read your post and see it works fine with just the CPU OC'd.
I'm thinking that your mobo doesn't have a working AGP lock. Might consider setting the 6800GT back to stock and see if the CPU OC is alone sufficient to cause the artifacts/problems in 3D Mark.

Fern

 

[CAndrade]

Mmm, Ive been reading, and it appears as if SOME K8N Neo2's have working AGP locks, and others dont. How would i be sure, that if i set AGP to 66/67 that it is locked? Im using ClockGen to set the clock speeds, and it always says 67 - Is this accurate? Does this mean its locked?

Thanks Alot

 

[Fern]

Sounds like it is. Maybe run Everest Home Edition to cross check?