You don't need 1200W, don't listen to those people. You actually only need 584W under full load, but to be on the safe side I would go with a 750W+ PSU, in case you decide to overclock or add more components.
I came to that conclusion using the Q9300, 2x DDR2 Modules, 2x 9800GX2's in SLI, 2 SATA Drives, 2x DVD-Burners, 4x 120mm fans, 1x PCI Card, and under 100% load.
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Core 2 Quad Q9550 @ 4.1GHz
Asus Rampage Formula X48
ATI 4870X2 2GB GDDR5 (800/1900)
4GB (2x 2GB) DDR2 960 (6-6-6-18)
750GB SATAII w/32MB
Creative SB X-Fi Titanium Fatal1ty
SilverStone 750W +12V@60A
3DMark06: 22605
Last edited by [-0MEGA-]; 04-13-2008 at 06:13 AM.
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