So im in a big conundrum. I brought this board used. its been working fine for a bout six months and yesterday it would not go past the splash screen and also not let me enter bios. It had two mismatched ram sticks installed 8gb and 4 gb. I removed the 4gb stick and it booted right up . After a couple of restarts the same problem and now it wont get past the splash screen. Ive tried removing my graphics card. changing memory stols. resetting bios nothing is working. Could my mobo be killing my rams? P.S stock setting no overclocking