The other thing that confuses me, is how (even for each Win7 / Win8 BIOS version), there are again two different versions.
In the case of the GT70 890 Pro, there is a version "50" for "WIN8 Default AHCI Mode", and version "70" for "WIN8 Default ...
In the case of the GT70 890 Pro, there is a version "50" for "WIN8 Default AHCI Mode", and version "70" for "WIN8 Default ...