Well, here are the results from the previous benchmarks with BIOS f5:
Unigine Heaven v4.0 @ 1920×1080: 6.13 fps
Unigine Heaven v4.0 @ 1600×900: 8.27 fps
Unigine Tropics v1.3 @ 1920×1080: 24.29 fps
Unigine Tropics v1.3 @ 1600×900: 29.47 fps
And these are the results from the benchmarks with BIOS f6b:
Unigine Heaven v4.0 @ 1920×1080: 6.02 fps ( -0.11 or -1.8%)
Unigine Heaven v4.0 @ 1600×900: 8.14 fps ( -0.13 or -1.6% )
Unigine Tropics v1.3 @ 1920×1080: 24.01 fps ( -0.28 or -1.2% )
Unigine Tropics v1.3 @ 1600×900: 28.73 fps ( -0.74 or -2.6% )
So that’s kind of depressing. In all fairness, I have installed virtualization software since then, so I’m not sure if the additional hypervisor components in the kernel are slowing things up a tad; it would not surprise me if they were. Additionally, I’m currently running kernel version 3.13.7-200.fc20.x86_64 rather than 3.13.6-200.fc20.x86_64. So there are a few factors that could be involved here.
Regardless, it’s a largely negligible change from a small sampling of tests, so I’m not too worried. The BIOS update can safely be said not to have worked any magic, but I wouldn’t consider this to be indicative of any meaningful performance regression.