I'm upgrading my cpu and am confused on a couple of the procedures necessary for installation. Basically, my computer is a Gateway DX4380G with an aahd3-vc motherboard. I'm upgrading from the a6-5400k APU that came with the system to an Athlon X4 750K. I'm also installing HD7770 graphics. My first question is, how do I know which BIOS update to go with? Or, is it even necessary? I have Windows 8. The Gateway download site provides no information the individual BIOS updates, other than their versions. Customer service has been unhelpful as well. The second question is, when I install the GPU, at what point should I remove the old driver software and install the new driver software? Thanks, John.