Power supply: What do I need for this system?

I've just built a new system with the following components:

Q6600 processor, peaked at 3.3GHz from 2.4
EVGA NVIDIA 680i SLI motherboard, I can't remember right now what I clocked it at.
2x Seagate Barracudas, SATA-300s arranged in a Raid 0 array
2x 12v optical drives (1 CDRW, 1 DVD recycles from the old computer)
2x1GB OCZ PC6400 DDR2 Dual Channel, up to 840MHz from 800.
EVGA GeForce 8600 GT, not yet overclocked
Two 120mm case fans
One small chipset fan (came with the 680i)
Huge Thermaltake Max Orb fan+heatsink, 3.0W, sitting on some Thermaltake TG1 thermal paste
Generic 430-Watt Power Supply, which came with the Cooler Master case

A concise question: Is the 430-watt power supply sufficient for this system?

As overclocked, it seems to run fine. It runs Call of Duty 4 at 1680x1050 and at the highest settings without problems, although at a less-than-immersive framerate, which I have attributed at this point to the budget graphics card and not a possible squeeze on power. I plan to add more RAM and a second 8600 within the next year, and I have yet to overclock the graphics card.

Could the power supply be or become a performance bottleneck? If so, what power supply would suffice?

Thanks for your thoughts.
Doug
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  1. With the existing hardware, that psu should do fine. It may not be enough if you decide to get a real graphics card (no offense). 8600 is not enough to run serious games like CoD4.
    http://www.guru3d.com/category/vga_2/

    A second one won't make much of a difference. You should at least get a 8800gt. It'll far outperform 2 8600s put together.
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