8800GT Overclock

g4m3rof1337

g4m3rof1337

Active Member
I'm tired of running stock, and I'd like to see a little more performance pushed out of my cards. My stock speeds are - 600/1500/900 and I'm running SLI. I tried searching around for some speeds, but didn't know if I should just jump to those speeds, or slowly climb. After I overclock my cards, I plan on doing my CPU, since I just got my cooler up and running. I also have aftermarket cooling on my cards.




Thanks.
 
What i usually do is i look at the highes clocks that my card can do, i look at numerous sites that reviewed the exact same card, and i overclock it a fair amount, then once i no i am getting close to the card max potiental i go to the 5mhz increasements.

e.g.

4670, 780 stock clock, i saw that the site got it up to 830, so i bumped it to about 810, cause i know my card can do that easily, then i know i have to do the 5mhz thing, cause mabye ill get a different result than the site, cause they generally use the top-noche parts.
 
I tried looking for XFX 8800GT overclocked speeds, but kept finding different stocks speeds and misinformation. Has anyone overclocked their GTs to noticeably better performance?
 
I appear to be stable at 700/1728/950. I ran about 20 minutes of ATI Tool, and played about 30 minutes of Bad Company 2. Wondering if I can get it any higher..? My temps are low 40s.
 
g4m3rof1337 said:
I appear to be stable at 700/1728/950. I ran about 20 minutes of ATI Tool, and played about 30 minutes of Bad Company 2. Wondering if I can get it any higher..? My temps are low 40s.
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low 40's? you could keep going until you hit 60-70. most people recommend stopping before 80. as long as you don't get any artifacts, you can keep going for a while.
 
joh06937 said:
low 40's? you could keep going until you hit 60-70. most people recommend stopping before 80. as long as you don't get any artifacts, you can keep going for a while.
Click to expand...

Really? Good to know. I upped the clocks a bit, 730/1750/1000, and I appear to be stable as well.. I set the clocks somewhat high, got some artifacts, then gradually lowered and tweaked them. Ran about 10 minutes of ATI Tool and played some L4D2, seemed fine. I'm going to let ATI run for a while and see what I get. If I can get this stable by tomorrow I'll overclock my CPU, it's at stock 2.66GHz atm.



Thanks.
 
OK, so recently with the new overclock and using Windows 7, since this is the first time using both at the same time. I'm experiencing display issues during games. During WoW and Bad Company 2, the screen goes black, then back to the game, then a bubble pops up saying one of the display drivers stopped working. I'm using the most recent drivers off Nvidia's site for Win7. I put the cards back to stock and I don't seem to have the problem, and I even lowered the clocks a bit too. I ran ATI Tool for quite some time when I first overclocked the cards though, so..

Edit: and the temps were fine, btw.
 
I just want to add:
When I overclocked my Geforce 8400 GS, it seemed stable at 592Mhz GPU and 603MHz memory, until I ran 3dmark, and it crashed in one of harder tests. Although it may seem stable in most things, 3dmark will push it to its limits. I actually had to lower my clocks down to 591MHz GPU and 601Mhz memory before it could run 3dmark multiple times without crashing, and I think that 3dmark still gives me a few artifacts. Another thing to remember is that it won't always get hot before it gets unstable, so don't judge its stability just by the heat.
 
Download drivers from evga.com and reinstall them. I would also lower the clocks by 10mhz or so on the core and memory just to be sure. 10mhz will not even mean 1/2 a FPS, and if it gets you stable it's worth it.
 
87dtna said:
Download drivers from evga.com and reinstall them. I would also lower the clocks by 10mhz or so on the core and memory just to be sure. 10mhz will not even mean 1/2 a FPS, and if it gets you stable it's worth it.
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I'm running 196.34 now and just experienced the problem.. I also ran ATI Tool for well over an hour without a problem last night. I'll try what you said though, getting them off evga and lowering the clocks.




Thanks.
 
g4m3rof1337 said:
I'm running 196.34 now and just experienced the problem.. I also ran ATI Tool for well over an hour without a problem last night. I'll try what you said though, getting them off evga and lowering the clocks.




Thanks.
Click to expand...
Don't forget 3dmark to test your stability. It'll tell you if it's stable or not. ATItool's spinning cube doesn't push your video card to its maximum, but 3dmark does.
 
3dmark doesn't test it 100% either. I've had clocks 3dmark stable that caused a BSOD after about 1/2 hour of gaming.
 
87dtna said:
3dmark doesn't test it 100% either. I've had clocks 3dmark stable that caused a BSOD after about 1/2 hour of gaming.
Click to expand...
^That's true. I guess what I should have said was "Test it with 3dmark and as many other GPU-intensive games as possible." But still, as I said, it puts more stress on it than ATitool's spinning cube.
 
highly doubt thats a driver issue, if its fine at stock...


Your OC is too high, I know ATT shows it as stable. But I've had many cases before where stability tools show a fine OC, but as soon as you game it craps out on you in some way!

Just lower your OC untill you can play all your games for whatever amount of time you play them, and you have a stable OC for your personal computer usage :)


For the CPU I recommend Prime95 & a video encode, also 3DMO6's CPU tests.
 
Well this is annoying.. I just played a solid hour of Bad Company without a single problem, launched Wow and cannot go a few seconds without the display issue happening, and exiting my game..


Any ideas on what to do?
 
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