This is great advice, except I'm not a huge fan of the PSU choice. A better choice IMO would be this
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703028
It's a little more $, but higher power and better quality. Also, it's not modular, but if you go with an open air case (which you should), it hardly matters.
Thank you Dargo, I'm going to take your advice on this one because I'm looking to buy a good PSU for powering the following in a single motherboard:
2x 5850
2x 7950
I need to get powered risers for these (x1 > x16), and I'm concerned about having enough molexes to power everything, but I think I should be good considering I only need them for the GPU's. I won't be powering fans since it will be an open case. Maybe I'll need to get a single 20 inch fan to help with cooling, but otherwise should be fine.
Crazy - I just saw your post while writing this one, do you think that the PSU linked by Dargo would handle what I'm trying to accomplish above? Looking forward to your response.
If you undervolt the GPUs (which is what I recommend), the PC P&C unit will be fine. I was running 5x 5850s off mine no problem (undervolted to 0.95 VDC). If you want to run at stock voltage, you'll probably want a more powerful PSU, but IMO this wouldn't be worth the extra power draw. I think you will have enough Molex to go to 4 GPUs, but if you want more Molex connectors for fans or whatever, I have two SATA ---> Molex adapters I can sell cheap - just PM if interested. I was actually running the 5th GPU off these adapters, which worked fine for an undervolted 5850.