My question is simple. Would I be able to do 2-way SLI with an MSI gtx 770 2gb and say a PNY gtx 770 4gb? If my knowledge is correct you can't stack vram so I would also only get 4gb of vram?
the sli is possible, however both cards would only run at 2 gb vram, also for sli, make sure you have the latest Nvidiadrivers, and are not using the manufacturer drivers.