Need another PSU calculation :(

[Minute]

So I changed up my build a little bit, and need help getting the watts calculated.

CPU: i5 2500k
MOBO: ASUS P8Z68-V PRO
Case: (undecided)
RAM: 8GB DDR3
HDD: 500GB @7200RPM
GPU: 2x HD RADEON 6950 (this was the change)
SSD: looking for a good deal, but will have one

If my guesstimate is right I'll need an 850W PSU?

In which case these are the best 3 deal available to me right now: (Not sure why the first one is so cheap)

[strike]http://www.ncix.com/products/?sku=58494&vpn=OCZ1000EXS-B&manufacture=OCZ%20Technology&promoid=1334[/strike] (nvm this one has alot of bad reviews)

http://www.memoryexpress.com/Products/PID-MX32589%28ME%29.aspx

http://www.ncix.com/products/index.php?sku=50802&vpn=OCZZ850M&manufacture=OCZ%20Technology&promoid=1334

 

[Timop]

750W would be enough id you don't OC or have 2GB cards. 850W gives plenty of headroom.

Either one is nice actually, if you care about efficiency and/or being modular then OCZ, if not so much then save the $10.

 

[ko888]

I wonder if OCZ has fixed the loose ATX connector pins issue with the OCZ Z Series 850W that JonnyGURU.com mentions in their test review.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=167