What is considered the safe voltage... Just wondering, 4.2 is plenty fast for me and I don't want to give up speed step, turbo, sleep or anything else.
Also how are raid 0 ssds working for you on P67, you know you lose trim support right?
Just noticed you have an LCLC water cooling setup. Nice!
Is the power supply I picked out too much? Should I go for something closer to 750-850?
Well there's no such thing as too much power (ask Tim "The Tool Man" Taylor... ).
Is the PSU you picked out overkill? Yes. But a 750 - 850W is perfect for what you need it do, plus you'll have more than enough ample room for future expansion. However if you want to get a 580, you'll need some serious power as it's a very power hungry GPU. Try this PSU - it's one of the best price/performance PSUs on the market:
I listed two cases. I *think* they would both work but is there are better choice?
Both are good choices but I'd heavily suggest and recommend the Corsair Carbide and Graphite series. Excellent, huge, roomy cases for not a lot of money.
I'm sort of lost on what hard drive to get. I don't need lots of space. I was thinking maybe a 300 gig. Any suggested brands?
Get a 128GB SSD and a 500GB standard drive - that will be plenty. One thing to keep in mind is that if you're using this system for games anything 300GB and below will fill up quickly as each game is anywhere from 8 - 16GB, plus a full Windows install is at least 16GB. So keep that in mind.
I'm not devoted to the video card and memory. They seem like good choices though. I know that the most expensive pieces aren't always the best. Is the video card worth that much?
The EVGA 580 is one of the best GPUs on the market right now, hands down. And they're a very reputable brand on top of that.
I actually would scrap buying the 990X - it's serious overkill and it's incredibly stupid to spend $1000 on a CPU that's outpaced and outperformed by a CPU that costs 1/3 the cost of the 990X (the i7-2600K).