Originally Posted by 47 Knucklehead
So what are the numbers for a Fury X + 980Ti as compared to Fury X + Fury X or 980Ti + 980Ti?
Who will Crossfire/SLI work? Will it only be as good as the worst driver? What if one card has a profile for game x, but the other card doesn't? How will Crossfire perform in non-Full Screen mode? (Crossfire DOESN'T work, but SLI does a little, so what will happen?)
Profiles are irrelevant in explicit multi-GPU. In this mode, the driver has no explicity knowledge that is being used in conjunction with another GPU. Synchronization, frame pacing, latency are all being handled by the application. The primary advantage that SLI and crossfire give you is the possibility to share resources between the adapters in a more efficient manner. However, this would manifest itself by using linked mode adapter. For multi adapter approach, the primary thing you need is the ability to use shared adapter resources, with some possible performance benefits if the standard Swizzle format is supported. These are just features of D3D12.
Profiles are a very clunky cludge that was necessary in DX11, in DX12 explicit multi-GPU I do not see how a profile would have any meaningful advantage.Edited by Kollock - 10/26/15 at 12:55pm