How much power supply for nforce4 sli board and 2 6600gt, A64 3000+ and 1 - 3 harddrives, 1dvd? 2 120mm case fans, xp120

[Tip Top]

Well the title says it all.
How much power supply for nforce4 sli board and 2 6600gt, A64 3000+ and 1 - 3 harddrives, 1dvd? 2 120mm case fans, xp120 . I will start with 1 hard drive and upgrade eventually to 3. I will start with one 6600gt and upgrade in a year to 2. Oh 1gb of RAM.

So I want quietest most efficient PSU. I was thinking a Seasonic tornado 400w or the Seasonic s12 430w as it has 2 12v rails, but neither is that large. How much watts does each 6600gt need? Is this too little powers supply? I will not overclock?

 

[alexXx]

my 350w enermax is supporting my 3000+@2200 BFG gf6800oc(overclocked to its max)1024mb ram, 1dvdrom, 1 cdrw, 2 hds 2 80mm case fans.
Your system looks to be about the same power hungry'ness' as mine, so if you got a silent 400wat, you should be aok

 

[overst33r]

http://www.jscustompcs.com/power_supply/ maybe this will help you, i found it to be pretty accurate