Picking the right PSU

[Seph351]

Ive recently built a new pc using a toughpower 850 psu and it didnt seem to be enough to power the system. After the first power up it turned on for a couple seconds and than cut off. Asus's wattage estimate tool suggested 1200w+ minimum for my system build. Other forums say that a 1000w psu will suffice. I was wondering if anyone could offer any insight before I make an order for a larger PSU?

System Specs:

1x Asus L1N64 SLi WS
2x AMD Athlon 64 FX-74
2x XFX Geforce 8800 GTX XXX Edition in SLi
2x Western Digital Raptor-X 150g 10k rpm HDDs
4x 1024mb Corsair XMS2 DDR2 PC6400 RAM

Plus fans, optical drive, fan controller, liquid cooling pump, and motherboard features

 

[Tigerbiten]

Your PSU is probably fine as at a guess your only pulling ~500 watts max.

You say after the first power up.
Did it power up correctly the first time ??

Try attaching a fan to the cpu fan header to check its not shutting down due to the bios not seeing any rpm from a fan.
Try taking it out of the case and building it on the mobo box, it could be a short is causeing the mobo to shut down.
Strip it down to min spec and see if that makes a difference.
Check the water cooling is not leaking causing a short.

Luck ..............

 

[Seph351]

Ive tried all of that already unfortunetly and it didnt work which sucsk figured i had something that wasnt seated properly