Best PSU for multiple GPUs

[TheCanadian0495]

This might be the wrong forum, if so I'm sorry. But I'm going to be buying a PC off of my buddy, and it has a 4770k and a 660 in it. I'm already planning on throwing a 970 in there, and originally I was going to sell the 660 to fund it, but then I got thinking, what if I used it as a dedicated PhysX card? So my first question is: is the 660 a worthwhile PhysX card? And secondly, what kind of PSU would I need to sit comfortably with that setup? His currently has a 500W, so I know that I would obviously need to upgrade that. But would around 750 be enough, or would I want to go higher? Any help is greatly appreciated!

 

[TechyInAZ]

a Corsair HX750 (750W) would be a great psu for your needs. And yes get 750W for multi gpu setups.

As far as PhysX goes, there are mixed views, most say that a PhysX card slows down your pc while others says it does. So you'll have to experiment.

However, you have a gtx 970, and if your only gaming at 1080P then don't put a gtx 660 in there since the gtx 970 will not be at full load when gaming at 1080P, use PhysX to give the gtx 970 more work.

 

[TheCanadian0495]

a Corsair HX750 (750W) would be a great psu for your needs. And yes get 750W for multi gpu setups.

As far as PhysX goes, there are mixed views, most say that a PhysX card slows down your pc while others says it does. So you'll have to experiment.

However, you have a gtx 970, and if your only gaming at 1080P then don't put a gtx 660 in there since the gtx 970 will not be at full load when gaming at 1080P, use PhysX to give the gtx 970 more work.

So if I just had the 4770k and the 970 (I'm not planning on overclocking a ton at the moment, as it's not really needed), would the 500 watt PSU be enough? Or would I want to go with a 750?