Alright, I did some digging and turns out those LEDs are overvoltage lights. So apparently my RAM is suffering from overvoltage. Could it be a faulty stick of RAM? I don't think so, since I started up with only one stick, then started again with another, and finally with the third, and the problem persisted. Or maybe my PSU is sending too much voltage to my RAM? I don't really know. I'm decent with computers but this is above my level of expertise...