As long as you have 2 8 pin pci-e cables, its ok.
Classy uses 8+8 instead of 8+6 like normal cards.
And you should be fine with a single card -I was runing gtx660ti sc slix2 on 750w psu, which can sort of translate to similar power usage as single oc'ed 780 classy.
Classy uses 8+8 instead of 8+6 like normal cards.
And you should be fine with a single card -I was runing gtx660ti sc slix2 on 750w psu, which can sort of translate to similar power usage as single oc'ed 780 classy.