HD 5850s in Crossfire with 550W PSU

[baresdakilla]

Hi guys,

I was thinking of adding HD 5850 to Crossfire, because the single one is starting to loose against the newer GPUs. So I wondered if those can possibly work on my FORTON BLACK POWER 550W.

My system specs are:
i5 750 (clocked to 3.2 Ghz, but I can always take it back to stock 2.66 Ghz if that'll appear to be the problem)
1TB + 0.5 TB HDDs
MSI P55GD55 motherboard
4GB Kingston 1600 Mhz RAM
DVD drive
WIN 7 ultimate 64 bit


I also appologize for my poor level of english, I'm from Czech Rep., so excuse that.

 

[reprotected]

Benchmarks: http://www.anandtech.com/show/2848/13

I would say upgrade to 650w to be safe.