What if I want to upgrade my CPU, Video Card, or even Ram Fan?
Can you recommend a 900w or above power supply because I would still like the option to upgrade my system. I feel 850w will only limit that option.
I highly doubt you'll need more then a quality 750-850W unit.
Both units i linked can provide far more output then their listed power output.
The 750w units is capable of powering 2xGTX 570's btw.
The 850w unit is capable of powering 2xGTX 580.
The only component that is limited in your list of components is your case imo.
Terrible cooling for an sli set-up.
A ram fan is a totally useless vanity.