Sorry, I wasn't clear. I kind of lumped the efficiency advantage of Maxwell in with its ability to use FP16 shaders. Maxwell vs GCN isn't anywhere near 2x the work per flop. I just think it's important to keep in mind that upwards of 70 percent of shaders can use FP16, and that does offer a 2x boost compared to the same work being done with FP32. I'm sure there is some inefficiencies so it's probably not quite 2x, but better than simply judging it by its FP32 thoughput.Where it works, yes. Just not everywhere, as you suggested when you claimed Maxwell's performance-per-GFLOPs would be 2x GCN 2's.
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