What to look for when looking for PSU for my 2x 7870 XTs?

[Elliot B.]

I have done the Power Supply Calculator and it shows around 650W, so I'm sure 750W will be enough.

 

Apart from 750W+, what else should I be looking for?

 

I keep hearing about rails or something.

[The Evil Overlord]

Personal recommendation

 

http://www.ebay.co.uk/itm/121260805665?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

I also know very little about rails, but this psu meets your power needs, and is tidier, as you connect the extra cables, molex's etc as per your needs

I believe if you have power hungry cards, this can also supply power directly

[snaphat (Myles Landwehr) Member]

Here's a previous post I wrote about rails:

https://www.neowin.net/forum/topic/1196279-new-graphics-card-crashes-every-game-even-90s-games/page-3?hl=rails#entry596234387

[Draconian Guppy]

Rails talk is usually about how many amps each individual connector can provide to the source required

[T3X4S]

If you need 650 - get at least 850 from a brand name.

IMO, I would get a 1KW Seasonic, or 850W corsair.

PSU are one thing that having more than you need is a good thing.

The reason I say that is I am currently using a 1KW Seasonic Platinum - and its supposed to be a great one.

It is the first PSU I have owned that wasnt a PC Power & Cooling.

But 850 would be the minimum.

You have to understand, that PSUs are stressed per the amount that is being used - so if you NEED 650, and only have 750 - it will be pretty stressed.

But if you NEED 650, and have 1000 - then it can handle what you throw at it without breaking a sweat which is exactly what I want from a PSU.