How good are 7870 crossfires?

[15105511]

Hi there guys, 

 

was just wondering how well 7870s fare when installed as crossfire GPUs 

 

Oh and is 600 watts enough for this build? If not, how many watts should i go to?

 

AMD Fx-6300

Asus M5A97 R2.9 AM3+ AMD 

8gb 1600 ram

Micron Crucial 120gb SSD

( MSI Radeon 7870 Twin Frozr 2gb )x2

2-3 120mm fans

Corsair 600w Atx12v

[Excon]

600w is cutting it close and crossfire you will see a bit better than 770 performance.

[tim81517lh]

750W 80+ Bronze or Platinum. There are a couple deals on newegg for corsair ones, good price for performance.

[Guest GRRigger]

600w is cutting it close and crossfire you will see a bit better than 770 performance.

better than 780 performance

 

Proof: http://www.techspot.com/review/644-nvidia-geforce-titan/page4.htmla

Also: http://forum.overclock3d.net/showthread.php?t=57011

[Gunjob]

750W 80+ Bronze or Platinum. There are a couple deals on newegg for corsair ones, good price for performance.

Ran it perfectly on 650watt 80% bronze, its about as powerful as a single 780.