Just a note - your PSU is most definitely fine with this system. I have a 750W PSU and it runs two overclocked 570s in SLI and an overclocked Core i7-2600K CPU. As above, I would suggest checking your CPU and GPU temperatures - just run Core Temp
for the CPU and GPU-Z
for the GPUs (tick Continue refreshing this screen while GPU-Z is in the background
). You can run two instances of GPU-Z, to keep record of each GPU. It's also a good idea to use Memtest86+
from a bootable disc or USB drive to check your RAM for any errors (two passes is enough).
It's plausible the freezing is a CPU or memory overclock issue but if you've reset your BIOS to ensure you're not overclocking anything, then this cause is eliminated. Same with a GPU overclock although GPU overclock instabilities tend to just cause a black screen or freeze the game alone (with the NVIDIA drivers complaining they failed to respond but recovered).
Having said all this, do you use your motherboard's onboard audio?
A lot of people have had crashing problems with BF3 by using Realtek onboard audio. They solved the problems by adding a sound card and disabling the Realtek onboard audio in the BIOS. Of course, if you add an Asus sound card, be sure to turn off GX
in the Audio Centre, as this also yields problems with crashing in BF3.
All in all, I'd say the very first thing to check is indeed the CPU and GPU temperatures as well as testing your RAM.EDIT:
Silly me, I just noticed there was a second page to this thread!
A good suggestion is to remove one graphics card and test out BF3 with it. Play for a length of time that guarantees a crash at the moment. If nothing happens, remove this graphics card and replace it with the other and test again. See if you can find a culprit faulty
graphics card. You can RMA in that case. If neither card works, you're either very unlucky and both cards are faulty
(maybe you can test them in another computer?) or the cause of the problem is something else entirely, which is more likely. If both cards work individually, you know the issue lies with the SLI. You can put both cards back in and test again - maybe reseating the cards or swapping their slots works. Maybe another SLI bridge although I doubt this would cause any crashing if it were failing.EDIT 2:
Something worth trying after the above is also testing each card individually on each motherboard PCI-Express slot you're using for your SLI setup. This is to check whether or not it can be a faulty motherboard slot.Edited by Gib007 - 1/4/12 at 6:20am