Power supply requirement for the r9 295x2?

[Fyree]

I was just wondering which power supply would be best if I was to get an r9 295x2? Currently I have a 750w PSU (I think it is corsair), and was thinking of getting an EVGA G2 850w (850w seems like a good SAFE minimum where there should still be enough power for the rest of the system, but correct me if I am wrong) PSU to power the thing since that power supply seems like it is really good. Would this be good, and also I heard that even if you have enough wattage to power the card you need to power it in a certain way, or else it could be extremely bad (something having to do with 12v rails and what not). I was looking at something like this for the power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16817438034 , along with this card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150710 .

 

[Archaic59]

XFX ProSeries 1050W 80+ Gold Certified Fully-Modular ATX Power Supply
Made by Seasonic
http://pcpartpicker.com/part/xfx-power-supply-p11050befx

If that one's too pricey for you:
EVGA SuperNOVA 1000G2 1000W 80+ Gold Certified Fully-Modular ATX Power Supply
http://pcpartpicker.com/part/evga-power-supply-120g21000xr

Requirement for 295X2 is 50 amps:
http://www.realhardtechx.com/index_archivos/Page362.htm

 

[Fyree]

XFX ProSeries 1050W 80+ Gold Certified Fully-Modular ATX Power Supply

Made by Seasonic

http://pcpartpicker.com/part/xfx-power-supply-p11050befx

Requirement for 295X2 is 1000 watts:
http://www.realhardtechx.com/index_archivos/Page362.htm

I thought that you could run this card with a 850w PSU (I have seem a few builds with it). Also what is the deal with the 12v rails? Are you supposed to have multiple in order to correctly power this card, and do each of the sepparate 8-pin power connectors going off of it have to go to different 12v rails?

 

[Archaic59]

Check this. Recommended 50 amps on 12 volt rail:

http://www.amd.com/Documents/Selecting-a-System-Power-Supply-for-the-AMD-Radeon-R9-295X2-Graphics-Card.pdf

Looks like the one you picked will work. Single 12v rail is fine as long as required amps are there. You won't be leaving much for the rest of the system. A little bigger than 850 might be advisable.

 

[Fyree]

Check this. Minimum 50 amps on 12 volt rail:

http://www.amd.com/Documents/Selecting-a-System-Power-Supply-for-the-AMD-Radeon-R9-295X2-Graphics-Card.pdf

Looks like the one you picked will work. Single 12v rail is fine as long as required amps are there. You won't be leaving much for the rest of the system. A little bigger than 850 might be advisable.

Alright, still considering if I should get this or not, but it is only a wee bit slower than dual GTX 980s, and costs a fraction of the price (even if I would need to upgrade my PSU). Thanks for the quick response, and for helping me understand that it only needs a single 12v rail! Also how much would this thing increase a power bill by in say the most expensive state (like California)? Just want to make sure that it does not increase it by too much.