850watt psu for 2 gtx980 and 1 780ti doable ? (with a i7-3770 which doesn't use lots of power)
Yes 165Watt x 2 = 330 watt for 2 980 + 250 watt 780ti = 580 watt .
plus the cpu and the rest of the system, adding to roughly 110W (to be safe), allow for gpu self and manual overclocking, 40w
total = 730w
850w @ 90% eff = 765w (psu efficiency often gets lower the closer to maximum you get)
~spare = 35w
just be careful djm, it may be a good idea to put a kill-a-watt meter on the system if you have one, then add one 980, then another and just see how close they get running some benchmarks each time
ok... I don't have one, but I might buy one. (In the mean time I can always run with either the 750ti or the 660... which is a bit counter productive though...)
However, I have a few spare psu (but not as good as the corsair...) Do you know what is needed to combine 2 psu ?
(I was able to found a sli bridge... )
merging 2 psu's isn't too hard when using risers, but connected to a motherboard it can cause problems
i used one when running my mining cards on a separate psu.