Friend went and installed Windows on his maxed out 15" MacBook Pro with the new m370x GPU and I got him to download and run Cinebench to see its GPU performance compared to mine. I'm running an iMac with an Nvidia GeForce GT 750m (1GB GDDR5 vs 2GB of the MacBook Pro variant) but when we both ran the test; well, here are the numbers... 750m: 72fps M370X: 47fps Most likely due to bad driver support and there being no available updates for drivers on the AMD front, the new card performed considerably worse than my iMac. Neither of us were doing intensive tasks; and it definitely was running of the dedicated card. My friend at a later date put the laptop on high performance mode, and was able to push that score up to 60fps, but even then this is a drop from my iMacs GPU. Is the iMacs 750m clocked higher or have a greater TDP?