hey guys sorry for the late reply, as per the OP I am using Windows 7. I don't believe your point about only Win10 supporting 4+ cards is correct.... I have read things like this:
http://forum.ethereum.org/discussion/comment/27675

Does anyone else have any suggestions? Does anyone know the latest version of Crimson drivers that work with AfterBurner 4.4? I am sick of Sapphire Trixx, it is a very annoying program.

Thanks,
Greg