i only have 2 750watt psus and is there any way i could run 2 770s and one r9 280x off of a 750watt psu the 770s will be for gaming and 280x for something else or should i just make another rig
I would say SLI the 770s, and sell the 280x. They are going for great prices right now, and you can put that to other useful upgrades on your pc. A new processor, motherboard, cooling etc.
SLI starts to scale poorly after 2 cards. So I would not go past 2.
If you already have the cards keep the 770s.
If you still need to purchase get the 780s.
the issue is is that i got the r9 280x however my second one got back ordered for about 2 months and i bought the 770s already so i was wondering what i could do with the extra r9 280x i thought of doing a complete amd build because i already have an nvidia intel build. what should i do with the r9 280x