Quote Originally Posted by KisaiTenshi View Post
If you're going for SLI, just buy the largest PSU you can get. I went from 750w to 1000w, even though I only use a single mid-range card. You're not wasting money or energy as long as it's a 80+ gold rating. The stuff that comes in HP's and Dell's are extremely cheap and usually noisy underpowered things that die if you try to put any video card or cpu more powerful in it than what came with.
May be not wasting power, but definitely money if you go with a 1000w with his setup. The only way he would need a 1000w power suppy, is if he was planning on running dual titans in SLI or had enough peripherals to need an amp boost, and thats at peak power which you almost never run into. He's going to need at max an 800w -850w supply. The worst advice you can give is to tell someone to just go and get the largest psu available. You should always tailor the psu to fit the system with a bit of headroom for an upgrade. Remember, he's probably not going to run SLI or overclock his CPU, which means you need to look at a normal clock CPU with a normal PC MB and a single Video card. Even running a single Titan he doesn't need the 1000w PSU, even if it's 80+Platinum. It's still going to be more watts then he's ever going to need. Now if he plans on running that 670 SLI or adding a crapton more peripherals then yah, maybe go with the 1000w, but remember bigger isn't always better.