Recently I built the following system, some parts were from my previous build namely HDD, Case and PSU.
New Parts: Intel Core i7 3930K G.Skill 16GB (4x4GB) DDR3 Kit, PC-12800 (1600Mhz), RipjawsZ, 9-9-9-24-2N Asus Rampage IV Formula, X79 Gigabyte 7970 3GB x 2 (Crossfired) Cat 12.8 3 x 23" Samsung LCD monitors (5760x1080)
Existing Parts: 2 x WD 500GB HDD 1 x OCZ Agility 3 120GB 1 x OCZ Agility 3 240GB Thermal Take tough power 850W Raven II case
OS Win 7 64bit Pro
Now the the issue I have is the system locks during gaming, usually after about 15 min or so. I can't even use the reset boutton on the case, I have to physically cut the power.
With general apps like Firefox for example I'm getting corruptions in the text and then a black viewing area, with IE9 I'm only getting corrupted text.
With 2 HDDs, 2 SSDs, 2 7970s and 4 120 fans running, do I need beefier PSU?
Unless your PSU is faulty it is enough.
What are the temps while playing games?
Although I prefer single rail PSUs, there is nothing wrong with that PSU powering a pair of 7970s. You should have room to spare... depending on what other power hungry components you have in the system. http://www.thermaltake.outervision.com/
I've fixed the issue by rolling back the video card drivers to Cat 12.4
Strange that I had issues with 12.8 where so many others don't. Need look into this more.