Check my rig

[penta]

setting up a new rig and just wanna double check that its gonna work!

biggest concern is if the 1200w psu is gonna be enough to run the 3x69900 or if i should go with 1500w, gonna  oc the cards and hopefully get close to 400mhash per gpu
and the motherboard only has 2pci 16x slots so last card will have to go in a 1x slot does that matter? or do i need to get an more expensive 3 16xslot mb?

will i run into any other problems with 6gpus?

3x HIS HD 6990 Fan 4GB DDR5 HIS 6990 Fan 4GB                      
RaidmaxX1200AE 1200W         
Athlon ll X2 250                     
Gigabyte MA-880GA-UD3H   or ASUS Crosshair IV Fomula                              
Nox Coolbay Devil Edition                                        
G.SKILL DDR3 2GB NQ 1333(2GBx1)                           

[Remember remember the 5th of November]

If you don't OC. Each card pulls 375watts. Make the calcs

[benjamindees]

Gonna go ahead and say "no" that won't work.

[SomeoneWeird]

If you don't OC. Each card pulls 375watts. Make the calcs

He quite clearly said he WAS going to oc' the cards, so don't be a smartass, and even then, it probably wouldn't work, because 375*3 is roughly ~1150, and that doesn't leave any power for the rest of the system.

[penta]

hm so 1500w it is then, what about the slots issue? is the only way i could use the cheaper MB with a 1x to 16x adapter?