Heres what I'm currently running
i5-750 OC with a very slight voltage increase, turbo mode, C State and EIST enabled.
EVGA P55 FTW
2x 4890s Overclocked to 925/1050
1X Sata HDD
2X IDE HDD using SATA/IDE adapters
2X sticks corsair DDR 3 1600
7 fans (1 80 4 120s, 2 200)
1x LED 92MM Cpu cooler
2x LED GPU coolers (80 or 92mm)
I'm looking to add a 4th HDD, a DVD drive and a touch screen fan speed controller. Its not so much that I need 800w+ but that I need 4 PCI E connectors. My current PSU only has 2 and running the molex to PCI E adapters is causing me all sorts of issues. I'm running the above on a 700w OCZ with out much issue, aside from hooking up 1 4890 via adapters.
-Wes