Two months ago I upgraded my GPU. With my previous gpu the games I played were very laggy but playable but with the new one I tested them and they were fine until this month. I was facing red screen of death and windows restart but I dont think its gpu the problem, because I opened the case to check for dust I find it clear and turned on my PC again. This time I no disk or dvd drive are recognized tried replugging both sata and power cable. Sometimes it worked but failing booting (blue screen of death after automatic repair) or it didnt work at all. Im wondering if its PSU failure all these problems or is it the motherboard?