Is 850w enough for 2 5870's

[heroofspirits]

hi all

quick question, i just bought 2 5870's, one is standard, the other is a vapour x.

i currently have a 850w power suply from thermaltake.

will this be enough to power them both.

i also have a *** load of fans in my case, will they suck the power from the cards?

thank you

oh and i also overclock

oh and australia is in its earliest ever heat wave, just though i should let you know

 

[TheViper]

I don't recommend the brand but it will be enough to power your system.

 

[TheViper]

http://extreme.outervision.com/psucalculatorlite.jsp
This is an excellent wattage calculator.

Click eXtreme Power Supply Calculator and then Lite Version.