so i recently bought a gtx 750ti to upgrade my pc i got from best buy. it has a 300w power supply, wich is the minimum for the card. but since i installed the card, the power supply is getting extremely hot, and i believe its affecting the temperature of the cpu, since its near the cpu's heatsink, i have this program called speedfan, and it says that my cpu is overheating, probably because the power supply is so hot. so uh, should i get myself a 400w power supply from evga?