alienware
Banned
I had the same problem as you , amd/nvida. I don't have a lot of cash but spent months saving, could not afford another psu only got a 550watt. Spent a lot of time looking and saw a zotac gtx660ti ampt (5 year warr as well) could get away with 550 watt psu, all of the amd's needed a bigger psu/power therefore for me the Zotac won hands down. You do not hear about many problems with Nvida drivers but I am always reading about amd's driver problems. By the way why do you need such a large PSU? you are running a i53570cpu which requires less power than my little old Q6600, strange anyway good luck with your search.
There were (apparently) issues with Nvidia's early Kepler drivers. Something about a RSOD. Thankfully I didn't jump straight on Kepler so I've had no issues whatsoever since August when I bought my first 670.
My issues with AMD were just so numerous that I could write an essay on them. Started with that pig of a 6970 Lightning and just went on. That never played nice from the moment I got it and even after two RMAs I was still having the same issues so I sold it. Oddly the guy I sold it on to had no issues at all.
My biggest gripe with the 7970 was artefacts ON my desktop (my Windows emblem bottom left would turn into glittery squares). That was fixed in later drivers but still the issues persisted. I had a 3D monitor (LG) endorsed by AMD as their 3D solution (using Tridef) and my monitor would become a black hole where the bottom half of the desktop would eat folders (they would reappear after a restart).
In the end I had to disable Sleep as it was what caused the issue which annoyed me because I wanted Zerocore ! that was part of what allured me to them in the first place.
I had no issues EVER with my GTX 470 (see it in the pic with the Zalman cooler on) nor with the GTX 480 SLI that I swapped for the 7970.
I have one issue right now with Nvidia drivers and that's Fallout 3 in SLI. Mind you it's fixed by simply running it on one GPU.