Hello eveybody, I have a Dell Dimension 3000, and everything have worked fine until now. I'm using a 250W PSU. I just bought a new video card (a 3dfuzion fx5500 PCI card require minimum of 250w), and decide to buy a new more powerful power supply just in case. I have no experience at all in power supply, so please give me some advices. Some of my questions are: - How much watt should it be? (for a good future) - What is a good PSU company for my computer? - Is it the same size for every normal PSU, or only some will fit to my case? - If I buy 2 sticks of 1gb ddr ram, are they gonna affect the PSU? This is how my case should look like inside: http://users.zoominternet.net/~garsh/Dell/dim3000-3.jpg Thanks for reading and I appreciate any help, D.