Unfortunately, overclocking Crossfire set-ups isn’t as easy as it seems, especially that ATI Overdrive does not work at all with me. So I followed this ingenius guide from NordicHardware on overcThe overclock showed considerable increase. According the my calculations, SM2, SM3 and total 3DMarks increased by 8.46%, 7.82% and 6.28% respectively from stock Crossfire results. In real-world applications, this translated to about 1 to 3 additional frames.locking Crossfire set-ups. It’s a relatively brute force way around overclocking; tedious and useless when the system is restarted, but it works.
I played around overclocking a single HD2600XT, so I pretty much knew how far it can be pushed with stock air cooling. So I settled for a 860/760 overclock, from a stock 800/700 using RivaTuner.
Without further adieu, synthetic benchmarks. Forgive the cluttered desktop. It comes with the was-frequent troubleshooting.
I am not quite sure what to make of the 1-3 FPS gain with a +60/+60 overclock. It seems too much for too little. Either that or I just need more testing. Is it my PSU bottlenecking? My CPU? Or don’t the HD2600XTs really have much overclocking potential? We’ll see.
What do you think? Feel free to drop comment.
Crysis does not respond well to overclocked Crossfire (Far Cry much?). It would fail to launch, crash and cause a BSOD. Even the slightest increment of +10/+10 makes Crysis go haywire. Stock settings make it feel good.