PSU for 4X R9 280x Cards.

[Nullu]

Would:

http://www.overclockers.co.uk/showproduct.php?prodid=CA-091-CS&groupid=701&catid=123&subcat=1084

Be sufficient for 4x: http://www.overclockers.co.uk/showproduct.php?prodid=GX-322-SP

So is 1200 Watts enough for 4x R9 280x cards? I hear these cards are power efficient.

[atp1916]

Would:

http://www.overclockers.co.uk/showproduct.php?prodid=CA-091-CS&groupid=701&catid=123&subcat=1084

Be sufficient for 4x: http://www.overclockers.co.uk/showproduct.php?prodid=GX-322-SP

So is 1200 Watts enough for 4x R9 280x cards? I hear these cards are power efficient.

1200w is borderline outside of undervolting.  Now, if you plan on undervolting, 1200w will be fine.  Each 280x is (stock clocks/volts) 275-300w.  

I would honestly recommend a quality 1350w like this one for peace of mind, and the fact Corsairs are generally overpriced and you can get more wattage for your dollar.

[dannygast]

I'm running the same config, but with the 1000 w PSU,... I do however undervolt my cards, and they do draw up to 1050 watts.
Also have only 1 driva attached and 3x Fan. It runs, so your PSU can definitely handle this,...