What's holding my GTX back

[methimpikehoses]

Can't get teh 8800GTX passed 625 core stable. Could this be a mobo or PSU problem, or just this particular GPU?

[Madpistol]

for stable, I'd say 630 core will be very close to the limit.

Benchable, you can push 660 core. If you have water, you can probably go even higher.

[methimpikehoses]

for stable, I'd say 630 core will be very close to the limit.

Benchable, you can push 660 core. If you have water, you can probably go even higher.

Yeah, I get pretty bad artifacts at 630, and sometimes BSOD.

Oh well, no need to push it for the benchmarks anyway.

[Madpistol]

What Power Supply are you using? That can also make a big difference.

cooling is also a big factor.

[MUYA]

Hmm I can hit 660MHz on core with my one...but with the help of rivatuner the fan is at 100% and case is not closed...

[Madpistol]

Hmm I can hit 660MHz on core with my one...but case is not closed...

same. I have to have all 4 case fans running @ max rpm to achieve cooling needed to get it to run like that, plus 100% 8800 GTX fan.

[methimpikehoses]

PSU is a OCZ Gamestream 600W, which you would think was strong enough, but I also have a decent OC on my CPU @ 3.52...

Might be heat related... GPU is getting into the mid 70's on 3dmark06. Air cooling, fans on auto.

[Madpistol]

Unless your PSU is going bad, it's not that. So that leaves heat.

Perhaps you can increase airflow to your 8800?

[breathemetal]

My gtx is @ 630 but it is stock
I see no artifacts, but maybe its so stable because it came like that?
Hmm...

[J-Mag]

Tried upping your PCI-E freq?

[methimpikehoses]

Tried upping your PCI-E freq?

No, is that the one that defaults at 100 or is it the 333?

The airflow isn't great, its a Centurion 5 case, but I have a Tuniq in there blowing things around so I would be surprised if it's heat. I'm thinking my mobo is set up wrong, or my PSU is a POS.

[J-Mag]

No, is that the one that defaults at 100 or is it the 333?


Default is 100. I remember that the 7 series liked an increase frequency when running high end benches. I ran 113mhz for quite a while. I am not sure how the 8800's react to it though.

[$n][pErMan]

GPU running in the mid 70's is quite low.

[methimpikehoses]

[pErMan']GPU running in the mid 70's is quite low.

Yeah, that's what I thought. I know they can get really hot.

I am also using both PCI-E connections from the PSU to the GTX. I wonder if I should try using a molex connector with an adapter and see if I get better results... seems like that was an issue for people a while back.

Could it be that my mobo just sucks at teh GPU OC????

[$n][pErMan]

Its also possible your GPU just can't do over 630Mhz on current voltages.... Id never touch those on a video card tho personally.

[methimpikehoses]

Here's what I got when I went to 640/1011 on 3mark06... it loaded proxycon, but before the benchmark animation started I got black screen, no signal, then this:

http://i156.photobucket.com/albums/t36/methimpikehoses/mar06dx9error.jpg?t=1181881047

[Bman212121]

Not all cards are created equal. Like sniperman said, it is very possible your card simply can't go above that without upping the voltage to keep it stable.

[methimpikehoses]

Not all cards are created equal. Like sniperman said, it is very possible your card simply can't go above that without upping the voltage to keep it stable.

meh. :( Probably true.