I'm looking to update my PC from Vista to Windows 10. It works fine & seems to be well in on all the spec on RAM , processor etc, disk space but I'm really confused about the graphics card spec. I have a Radeon HD6700 series graphics but having read various info it doesn't seem to appear on any of the compatibility lists. I see HD6000 series and HD7000 series is ok - so is HD6700 part of a "6000" series or something else? Basically I just want to know if HD6700 is compatible before I purchase a W10 download Please help!