Hello all i recently installed a new 1 TB SSD into my sons pc, he currently has 500gb SSD as his primary. He is running a gigabyte motherboard. I read somewhere you needed to turn on CSM and when i did the screen was blank and i couldnt do anything, i replugged the hdmi so i could get back into bios and turn off CSM. Can someone tell me how to do this and make the new 1TB primary? i can see his new one when i go to ''This Pc'' i can see both and i already activated it but i dont know how to make it primary. Thanks all!