I have done a fresh install of Windows 8.1 and I have installed the latest beta drivers.
Getting serious framerate drops in the likes of BF4, CoD Ghosts and some of my older games. Some games are just consistently low. My older system was 5 years old with a single HD6950 and works slightly better
zGPU shows one card at x16 and one at x4 but they are both in x16 slots.
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More aboutcrossfire hd6950 poor performance
go intoo the mobo bios and look for your pci-e settings probably just have to enable it.
I couldn't see anything in the BIOS for PCI-e but I'll have another look. Does the CPU look good enough? Could it be bottlenecking?