Flybywyre,
Replace the Power Supply now. You are running under powered with just the motherboard and CPU, without taking into account a Video Card.
Look for a good name brand Power Supply. I always use Antec Power Supplies and they have not let me down yet. You are going to want something around 400W to 450W if you ever plan on adding a GeForceFX or a Radeon into your system.
Take Care,
Richard