I just bought all brand new parts off of newegg. A new motherboard with a 1.8ghz intel core 2 duo processor, 4 ram ddr2 slots at 533mhz, a pci express 256mb nvidia graphics card, a sata 80g hard drive, and a dvd-r/cd-r drive. I bought a case that came with a 400watt power supply. I don't think its enough because i can't get my computer to stay on. When i hit the power button the system fan comes on for a second and then turns off. Is this a lack of power? A few times i got the system fan, heat sink fan and the graphics card fan to come on but nothing came up on the monitor. and when i wiggled the graphics card around everything shut off. can anyone help me??! do i need more power??!