I'm thinking of purchasing a MSI z87 G45 mobo. For the cpu a 4670k...this is haswell..and there may be a problem. My current psu is a OCZ modxstream 700w. Its not on the haswell compatibility list. I know you can disable sleep states in bios or the os but i'm switching from amd and i need to do a clean install. How can i access the bios if i have to install a fresh windows install first? I heard people not being able to POST. If i cant even post (idk if i will or not be able to) how will i access my bios?