Hi, This is my current build: Hd: HGST Deskstar 2TB 7200rpm HD HD SSd: Kingston HyperX 120GB Mobo: MSI 990XA-GD55 CPU: AMD Phenom II 720 (with 4th core unclocked) Ram: 12GB, 2x2GB,2x4GB GPU: MSI Geforce 8800GT 512mb 2x SLI Fans: 3 Case fans My current PSU is a Raidmax Rhino 450W http://www.frys.com/product/5366448 While running Furmark, HWinfo reports the following ranges: 12V: 11.58V-12.144V 5V: 5.03V-5.129V 3.3V: 3.12V-3.216V The system doesn't crash or freeze while gaming, but I do get BSOD while under light loads, and I am occasionally getting drive errors (On the 2TB Hd). I do not O'C this system at all, and I only occasionally game on it. I also do not do anything CPU heavy light video conversion and etc. The noise I hear from the PSU sounds like a faint noise of a hard drive that is constantly seeking that is constant and doesn't change with load. What PSU should I get? I keep reading horror stories of underpowered PSUs and I'm worried about the one I have powering this rig. I want the cheapest decent PSU that is strong enough for this current build. Any future upgrades will be with video cards that use far less power, and I don't plan on keeping this rig for very long. I know some might want to make a "you need a $300 2000W PSU" recommendation, but my budget is extremely low, and I built this rig for only $350, so I can't justify spending huge amounts on a PSU. btw, could an underpowered PSU cause BSOD, and random drive errors? (it never crashes while gaming, only under light loads) Thanks for your help!