ShintaiDK
Lifer
- Apr 22, 2012
- 20,378
- 145
- 106
Did you not read the post above you?
"This graph highlights how frame times and frame rates aren’t the same — according to our first graph, D3D is faster than Mantle. Actually play the game, however, and Mantle is easily the superior solution."
If you split the frame into 50%/50%, 1st GPU has 4GB of VRAM and needs to render ~50% of the workload, the 2nd GPU has 4GB of VRAM and needs to render ~50% of the workload. That's why your can load much more than 4GB of VRAM into 1 frame and split the resources. With AFR this isn't possible since GPU 1 renders frame 1 and GPU renders frame 2, meaning that at any given frame, GPU 1's 4GB of VRAM is the limit for frame 1.
Since it's unlikely that a single frame can be split into 50% VRAM and 50% GPU load evenly for each GPU, that's why scaling is not going to be similar to AFR's. However, it means you can theoretically use both of the GPU's VRAM pools simultaneously.
Single card vs SFR. Its not that hard to understand is it? That extra card is giving a whooping 20-25%.
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