Welcome to SPCR. Your system as defined (assuming the 7950 Boost version) will use ~ 350W under stressed load and no more than 300W while gaming. I like the Seasonic X series as well as Kingwin LZP series. Either the X-550/560 or x-650/660. For Kingwin it's LZP-550, LZP-650. You could go with the 500W class. While the fan will be ramping up a little bit at 300W, the video card noise will overwhelm it. Or, you could go up to 600W class. (shrugs). There's also the Seasonic Platinum fanned and fanless. the 620XP2 fanned or 520FL fanless would fit.
Couple of build comments:
- I'd spend another $20-30 and go with the Define mini or the R4.
- I hope your monitor resolution is >1080p, otherwise the 7950 is probably overkill.
- Few games make use of hyperthreading/more than 4 cores. Unless there's another app than can make use of it, you could easily move down to the i5-3570K.
Thank you for the suggestions. So far what I've found available has been the X650 series for $120, which again is part of the reason I went with the X650. It's actually cheaper than the LZP-550. I understand that with the graphics card I'll probably run into more noise, but my goal is to make things quiet when I'm not gaming. My only concern was reading about the whining noise, I just can't get handle on whether it was just a temporary issue with production, related to specific environments, or what.
I guess overall given availability and price it's still my best choice, and I'll just have to risk having to return it to Newegg (the ShopRunner account may come in handy).
Regarding the other comments, they are appreciated. The machine is actually going to be somewhat of a hybrid workstation and gaming. I have a 1440p monitor which is why I'm planning to go with the 7950. Regarding the processor, I am still debating between the i5 and i7; the i7 is $40 more at MicroCenter which seemed like a good deal but it's definitely low down on the list.