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How do you guys OC with SLI?

post #1 of 6
Thread Starter 
So.....ready for my first ever SLI setup ever.....

how do you guys overclock and check stability?

tips, hints? any difference to normal single GPU overclocking?


cheers
post #2 of 6
you can basically OC as high as the lowest will go
like if you have 2 470's and 1 can go too 800mhz core and the other can do 850 then the highest you can go on both is 800
post #3 of 6
Overclock using something like MSI Afterburner or EVGA Precision. Just sync both cards up and start OCing slowly with the core/shader and then the memory. I get higher frame rates when my memory is OCed. Depending on the series 200 or 400 or 500, the core/shader will be linked together and cannot be separated (shader in the 500 series is 2x the core).

Avoid running Furmark and the likes for GPU stability. It's not too accurate imo. I like to run Crysis for 99 loops and then play it for an hour or two. If it's unstable it'll either crash out during the 99 loops or about 1 hour into the game.
post #4 of 6
Use MSI Afterburner and in the settings make sure "Sync settings with similar graphics processors" is checked and then just go on!

For stability testing use something like Kombuster to see if your temps are alright, and something like 3DMark11 ( just get the basic version) to see if the actual clocks are alright...
    
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post #5 of 6
Hook up your monitor to one card with SLI off, find max overclock. Hook it up to the other card, find max overclock. Rinse, repeat. Hook it back up to the primary card, enable SLI, set all cards to the speed of the lowest max overclock amongst the cards.
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by AK-47 View Post
you can basically OC as high as the lowest will go
like if you have 2 470's and 1 can go too 800mhz core and the other can do 850 then the highest you can go on both is 800
yup i know that

Quote:
Originally Posted by Villosa View Post
Overclock using something like MSI Afterburner or EVGA Precision. Just sync both cards up and start OCing slowly with the core/shader and then the memory. I get higher frame rates when my memory is OCed. Depending on the series 200 or 400 or 500, the core/shader will be linked together and cannot be separated (shader in the 500 series is 2x the core).

Avoid running Furmark and the likes for GPU stability. It's not too accurate imo. I like to run Crysis for 99 loops and then play it for an hour or two. If it's unstable it'll either crash out during the 99 loops or about 1 hour into the game.
i've read over at the ATI forums that using MSI AB to sync the two cards won't save the overclock settings on the secondary cards once you reboot

Quote:
Originally Posted by HarbingerOfLive View Post
Use MSI Afterburner and in the settings make sure "Sync settings with similar graphics processors" is checked and then just go on!

For stability testing use something like Kombuster to see if your temps are alright, and something like 3DMark11 ( just get the basic version) to see if the actual clocks are alright...
thanks ^read above comment

Quote:
Originally Posted by AyeYo View Post
Hook up your monitor to one card with SLI off, find max overclock. Hook it up to the other card, find max overclock. Rinse, repeat. Hook it back up to the primary card, enable SLI, set all cards to the speed of the lowest max overclock amongst the cards.
thanks

+reps to all
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