Mine is too loud. I was wondering, do I need 400W or will 300 be fine? Im after a Nexus NX-3000 ATX Ultra-Quiet PSU 300W from QuietPC.com I got Athlon 2200+, 256MB PC2700 DDR "Crucial" Ram, Asus A7V333, 40GB 7200RPM Seagate H/D, Maxtor G200, Toshiba DVD-ROM, keyboard, mouse, usb modem, ****ty sound card. Thats about it. I might upgrade H/D soon... get a second one running. I think this affects what Im tryna do yes? Does it matter how big it is, to how much power I get? Soooo... will 300W be enough? Obviously, because the 400W is considerably more £££, I dont want to be splashing out for something I dont necessarily need.