Will my PSU let me crossfire

My PSU is a:

OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply

I currently run a GIGABYTE GV-R577SO-1GD Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

And want to know if I could crossfire them with my current system.

Mobo: 870A - g54
CPu: AMD Athlon II X4 635
Ram: Crucial 2x2GB 1333 DDR3
HDD: Caviar Blue 500mb
Lite On cd DVD burner

Any help would be greatly appreciated.
3 answers Last reply Best Answer
More about will crossfire
  1. Best answer
    Here's a link to a PSU calculator. I just guessed on a few things, but it looks like you should be fine.

    A single 5770 puts you at about 280W. Cross-fire puts you at about 340W. It is a 80 Plus Cert. PSU, so you should be fine.

    You may want to try out the calculator with the actual information of your system - like any powered USB items, etc.
  2. i would always upgrade the psu to be on the safe side, psu crash can take down the whole system trust me you dont want to go there, the psu should work with the crossfire but i wouldnt recommend it.
  3. Best answer selected by mailmanlove.
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