You can't run a 6990 in three way, only in 'normal' crossfire on a board that supports quad crossfiring,
buy three if its a deal, then sell one on or keep as a spare in case of disaster
and no, that psu wont handle three in any case, 750w psu is recommended for one card alone
yeah i have an hafx case. Damn here i thought 1250w psu would be enuf for 3x 6990.
But it seems moto said you cannot do 3way xfire???
im pretty much getting 1x 6990 for 200 bucks per card. such a bargin from a good friend
i got amd 955 be (OC to 4ghz)
msi k9a2 cd mb
dd2 4gb ram
1250 antec quattro psu
3x sata hdd + dvd drive
i might have to chg mb/cpu to avoid bottleneck, but thats no issue can be sorted out easily. AMD 955 is still a wonderfull CPU once overclocked in my opinion, and dd2 is appearently not much of a speed difference to ddr3 conversion.
Okay I went onto one of those PSU calculator sites, I overclocked the cpu put 2 6990's in 5 drives a couple of fans a dvd and a few other goodies...
at full system load 1210 Watts which is really close to your 1250W ceiling...
That being said, I would say get another PSU that is 1400 Watts or something thereabout... Or just use one of the 6990's and ship the other 2 to my address (I'll test them for you )
Im about to get 3x 6990 cards at a super cheap price that i cannot refuse, its pretty much a bargain.
I have currently using antec 1250w psu quatto.
Will this be enuf to run 3x xfire?
You can accurately and objectively determine the PSU requirements in watts and 12v rail amps. for this or a future build from the link below. It's easy and accurate. Give it a try and then you'll be able to help yourself and other PC enthusiasts in the future.