I just purchased a new MB, a MSI Z77A-GD55 and am upgrading from a B75 Gigabyte board. I will be swapping onto it my i7-3770k, my MSI GTX 760 OC TwinFrozr and my SSD which is currently set up to dual boot either Windows 7 or Windows 8. Prior to this I had another motherboard (Gigabyte Z77A-UD3H) that didn't work so I went back to my B75, I then "upgraded to W8" and after not liking it, decided to do a fresh install and partition for multi-boot of both W7 and W8. Now my rig is set up just how I want with both OS's in their own respective drive path. Once I open the case up and pull this thing apart, then put it back together on the new MB, what am I going to do for the OS SSD? I am certain it shouldn't work on the new MB the same but is there anything I can do in the BIOS so I don't have to fresh install both operating systems or is a fresh install the only way to go? I don't want glitchy operating so if the second way isn't as good as the first just give it to me straight As a side note how much space should each partition have for each OS? Right now I have 70GB for Windows 7 which I have my games installed on and 40GB for Windows 8 which I don't use too much unless I am syncing with my new Windows 8 phone (yay). I love this combo by the way and I am thoroughly enjoying the awesome SNES emulator for W8 and W8P. Another question, I have a decent air cooler for my CPU (EVGA Superclock). What is a good overclock for the 3770k on air? is 4.2 a good OC or should I go higher? Thank you all who read and reply, your help is invaluable. FYI I have 20GB free on the W8 partition and 30GB free on the W7 partition as well as a separate 1TB HDD for my media files which is shared across both libraries and OS. Thanks again.