Hi guys, Finally managed to get Windows 8.1 64bit installed on my Mac with a huge thanks to yjchua95 who helped me. Just some early benchmarks that through up some interesting results. Both systems are nearly identical aside from a few differences; New one is a 2.5GHz vs my old 2.3GHz, M370X vs 750M, W8.1 vs W7. Aside from that it's all the same. I've also not tried installing new AMD drivers as the Catalyst Control Centre said I was up to date, even with beta, but I'm downloading the latest Beta drivers regardless, hopefully AMD brings out an update soon. First bench I done was Unigine Valley. DX11, High, No AA, 1920x1200; M370X - 21.8FPS 77*C 14.7% 750M - 19FPS 78*C BF4 64Bit Test Area run around with Fraps and doing a System Test, will try Mantle with the beta drivers. Medium, 1680x1050,DX11; M370X - 48-80+ FPS (mostly high 60's) ST - 78FPS ~50% (hard to bench) 750M - 38-62 FPS (mostly low 50's/40's) ST - 52FPS CoH2 Performance Test, Medium, low AA; M370X - 33.6FPS 76.56% 750M - 19.03FPS High, low AA; M370X - 26.41FPS 69.67% 750M - 15.57FPS I'll be running more tests and benchmarks, hopefully will repeat with newer drivers. So far in BF4 and CoH2 the M370X looks noticeably stronger. Will be testing Skyrim and WoT next, will try to get Mantle running too. EDIT: Tried installing the latest Beta drivers, no luck, they don't detect the dGPU. Have to stick with the ones provided by Bootcamp.