So im purchasing a new motherboard due to an incompatibility with the rx 480 i just bought, however my os windows 7 home premium that i currently have is oem so when i replace the motherboard i will have to install a new os. I have 2 hdd installed in my pc, the one that came with the computer had has the os and 99% of my data, and a new 1tb i just bought with nothing really on it. Question, if i install the new os on the empty card will it still wipe my old hdd or only the one i install it onto, second if i install it in the new hdd while still having the old os on the old hdd, will there be issues. from what i understand i can change the boot up sequence in bios to select which os boots first but i just want to confirm that i will not have to wipe my old hdd and there wont be any issues having 2 operating systems installed at the same time