Trying to hook up db1222 in my room

Altrantis
Altrantis Posts: 5
Hey guys, so I'm trying to hook up my subs and amp in my room using the computer psu method.

These are my subs: http://www.polkaudio.com/products/db1222

And this is my amp: Hifonics BRX2000.1D

My question is how much power does my psu have to have to run my system?
I've attached the amp specs.