I upgraded my pc to a newer motherboard and cpu, once i was finished building it, I started my pc and it went on as usual and then it beeped once followed buy three quicker ones, I checked what it could be and some said gpu some said ram but I reseated them both and my pc works fine and even better than before, my gpu works normal and my ram works normal, for example I played rainbow six siege and everything went smoothly, what could be the issue?