Since it's the last day for the $20 MIR on the Corsair 650TX - http://www.newegg.com/Product/Product.aspx?Item=N82E168... - I'm just wondering if the general consensus was that the 650W's from a good supplier are still considered to be sufficient enough for the i7 930/5850 build (and if there's potential headroom for OCing/Dual 5850's down the road). No water cooling or anything like that, just the typical HAF 922/X58 setup with 1 7200 RPM HDD and 2 drives for CDRW and DVDRW.
Well Toms itself did a crossfire 5850 test with an i7-975 @ 4 GHz, n they found that the entire setup consumed just 469 Watts @ full load on Furmark (you'll get even lower power consumption with gaming, since it is not an intensive as Furmark). http://www.tomshardware.com/reviews/radeon-hd-5850,2433...
So yes, I think Corsair 650tx is sufficient for your rig, even with 2 5850s & Oc'd 930.
The 975 cpu o/c in that test would have pulled a lot less watts. its the best cpu's from the wafers. That would account for about 100 watts (maybe) between the tests above. Also they took the 930 to 4.2 in the xbit article.
the 650 should be fine for now, but yes as everyone lese said u may want the 750 or 850 for future upgrades.
and for whoever said get an ultra psu yes theyre way better than average but not as good as corsairs