So I replaced my 2 5870's with 2 5970 4GIG cards. Now about 50% of the time I cold boot the PC freezes about 1 second before the Windows 7 login screen appears. At that point the fans on the seconadary card go to 100%. Usually a hard reset sorts it until the next time I do a cold boot and it happens again or at least seems to have a 50% chance of happening again.
It's really strange as both cards are working fine, games play fine, all cores are being used, temps are normal. Checked with afterburner and gpu-z. I thought it was a driver issue, even reinstalled Windows 7, intel chipset drivers, and catalyst drivers, nothing else and as soon as I shutdown and turned the pc back on the issue reoccurred. Tried 10.4 and 10.5 cats. Also made sure to disable powerplay in case it's an issue due to low clocks on bootup. No good. I've also updated my EVGA motherboard bios to the latest version and am not overclocking. I wonder is this something to do with crossfire (maybe not enough voltage to the cards on bootup) or something to do with my PSU
One thing I have noticed is if I run the Heaven benchmark using CCC everything is fine. As soon as I load Afterburner I get major major microstutter. The bench runs for a couple of seconds, then stutters, then sort of speeds up, repeat. Afterburner shows all cores are being maxed and the clock speed on each core is maxed so I don't think it's powerplay slowing down clocks. I wonder could this have somehthing to do with my problem. Of course uninstalling afterburner has no effect on the problem. Just get's rid of the stuttering.
Any advice appreciated
It's really strange as both cards are working fine, games play fine, all cores are being used, temps are normal. Checked with afterburner and gpu-z. I thought it was a driver issue, even reinstalled Windows 7, intel chipset drivers, and catalyst drivers, nothing else and as soon as I shutdown and turned the pc back on the issue reoccurred. Tried 10.4 and 10.5 cats. Also made sure to disable powerplay in case it's an issue due to low clocks on bootup. No good. I've also updated my EVGA motherboard bios to the latest version and am not overclocking. I wonder is this something to do with crossfire (maybe not enough voltage to the cards on bootup) or something to do with my PSU
One thing I have noticed is if I run the Heaven benchmark using CCC everything is fine. As soon as I load Afterburner I get major major microstutter. The bench runs for a couple of seconds, then stutters, then sort of speeds up, repeat. Afterburner shows all cores are being maxed and the clock speed on each core is maxed so I don't think it's powerplay slowing down clocks. I wonder could this have somehthing to do with my problem. Of course uninstalling afterburner has no effect on the problem. Just get's rid of the stuttering.
Any advice appreciated
Last edited: