I just put a new board, chip, memory and video card in my system. I am running an Abit NF7-S board with an XP2600+ (333FSB), 512mb pc3200, and a geforce4 ti4200 128mb 8x agp card. I am trying to use my old antec 300w power supply. A couple of times after using the computer for a while, it restarted itself. Think I need a bigger power supply?