6800 GT Unstable O/C

Liquid_Cooled · Aug 2, 2004

their is no doubt the 6800 GT can overclock to 6800 Ultra levels, but im wondering if the GT is stable at that level? the GT and Ultra have the exact same (pipelines, memory, features), the only differance is the higher clock speeds AND THE 2 MOLEX CONNECTORS ON THE ULTRA. does the Ultra NEED the extra molex to be stable at those levels? they must be there for a reason. i wonder if anyone else noticed this too. please help!

dicecca112 · Aug 2, 2004

probably needs more voltage to reach those speeds, hence the two molexs.

shiltz · Aug 3, 2004

at ultra speeds only 1 molex is required, the 2nd one is only required if you are O/C past ultra speeds.

dicecca112 · Aug 3, 2004

do you have documentation of this? Unless Nvidia pulled a huge 360 on principal, I doubt they want to advocate overclocking their cards.

Amrathe · Aug 3, 2004

My 6800GT runs at Ultra speeds with NO problems at all. 100% stable (I haven't seen a crash yet.. not in 6 hours of brutal Far Cry, not in 6 hours of Morrowind at max settings)

Nandro · Aug 3, 2004

My GT will only run stable at Ultra speeds when the room is somewhat cool. I havent had A/C at work for 3 months and in the afternoon the card would start giving me problems when it got warm. Hopefully it will be stable well beyond that when I can afford the dangerden water block.

maxwedge · Aug 3, 2004

My Leadtek 6900GT is running 410/1.1 with no problems. :clap:

Played games for about 4hr's last night and it was fine. Even had most of the quality settings maxed out.

Sentential · Aug 3, 2004

414 | 595 (1190) perfectally stable here. What happens is that when you OC past a stable point, you will litererly see the core starve to death from lack of power.

But yes, they do just above Ultra speeds. I think the average is 420 | 1150

maxwedge · Aug 3, 2004

I wish they put the extra power conector on the GT..... or is that the only difference between the ultra and GT? Of course I know the bios is different also.

Sentential · Aug 3, 2004

maxwedge said:
I wish they put the extra power conector on the GT..... or is that the only difference between the ultra and GT? Of course I know the bios is different also.

No there are a few more resisters missing, but who really cares? We all got ultra for fairly cheap. Not like anything is gonna challenge the GPU for a long time.

Huigie · Aug 3, 2004

My watercooled XFX 6800GT runs DOOMIII 450/1150 all day @1600x1200 @ standard voltage.

mattspalace · Aug 3, 2004

I ran my 6800 GT for a week at 420/1.1 without a hiccup. Played games for about three hours also. That extra molex might be for those with weaker PSU's - which I don't have.

Vector · Aug 4, 2004

My GT ran fine at 420 until I tried Doom3 on it...at which time I noticed artifacts. I posted earlier somewhere about this, but check out Carmack's comments on the HardOCP.com Doom3 review.
Got it running at 400/1100 now and don't seem to have any problems with doom now...might be something of a Doom3 burn-in issue, lol, but Carmack seems right about what he said.
btw, running said game @ 1280x1024, 4X AA, 8X AA

6800 GT Unstable O/C

Liquid_Cooled

Member

dicecca112

Member

shiltz

Member

dicecca112

Member

Amrathe

Member

Nandro

Disabled

maxwedge

Member

Sentential

Contributing Member

maxwedge

Member

Sentential

Contributing Member

Huigie

Registered

mattspalace

I been Dolk'ed Senior

Vector

Member

Similar threads