XP vs Win 7 clock rates.

[FerrelGeek]

While trying to get Crysis running on my new Win 7 Ultimate (64 bit) install, see this thread, I made the discovery that I had to drop the core/mem clock rates to get the game to work. For those that haven't seen the above thread, I'm running a HIS 4870 w/ 512MB. In my XP boot, I'm running Cat 9.11 with a gaming profile that sets the core/mem clocks at 770/905; I set the fan at 40%. I can play Crysis just fine - no artifacts, no problems. Now, my Win 7 boot has Cat 9.12 hotfix installed, but to get Crysis to work I had to drop the core/memclocks to 700/790 (fan at 40%) to get Crysis to run. In fact, if I set the clocks to my XP settings, the driver crashes without running any games. In fact, I ran the test feature in CCC and got the black screen of death and had to reset my PC. I'll admit that I haven't done exhaustive reading on ATI cards and Win 7, but I haven't seen much on this. Is this a normal occurance? Am I missing something?

 

[[H]ocusPocus]

I have a 4850 and after updating from XP 32-bit to Win 7 64-bit I had to dial back the OC on my 4850. But I have also occasionally had to dial back the OC a bit on my 4850 after updating to new Cat's.