Minimum psu for crossfire 6850's

SuperDuperMe

SuperDuperMe

New Member
Hey all, basically, im upgrading my computer in a few weeks, but intend to crossfire my 6850 later next year, what is the minimum psu required for 2 hd 6850 on a 1090t system with minimal overclocking (if any at all).

I currently have an old corsair hx 620 watt would this be enough or would this be pushing it?

EDIT: just to clarify i mean the absolute minimal amount of money i would have to spend in GBP/UK to get crossfire up and running safetly not minimum watts.
 
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SuperDuperMe

SuperDuperMe

New Member
What would be the cheapest route, but safe. Thats probably the major point, being safe with it, i want it to be cheap but not enough to compromise my build.

Do you have any recommendations for the cheapest unit possible without compromising on quality.
 
Okedokey

Okedokey

Well-Known Member
The original PSU is fine even with overclocking. The 6850 is by no means powerful. Absolutely no need to buy a new PSU for an additional 3A on the 12V rail. 2 X HD6850 pull a max of 300W (TDP 127W each) when overclocked. Thats 25A, leaving 25A for the rest of the system. Heaps.

If you want to spend $100, add it to your CF 6850 budget and instead get a GTX580. That too will work on this PSU and will be faster for almost all games. You then have the potential to add another in a year or two if you wish.

But either way, if you're happy with the 6850 in CF, thats cool, the current PSU will work just fine.
 
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