This is probably a noob question, but hey, that's what these forums are for. I recently completely upgraded my computer. (except hard drive, PSU, and optical drive) My build is as follows... AMD Phenom II X6 1055T Thuban 2.8GHz Socket AM3 125W Six-Core Desktop Processo GIGABYTE GA-970A-UD3 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX AMD Motherboard (2)(Crossfire) Gigabyte's GV-R685OC-1GD Radeon HD 6850 1GB OC G.SKILL Sniper Low Voltage Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Western Digital Caviar SE16 WD5000AAKS 500GB 7200 I'm still using my 500W power supply which has 2 cables for the cards so I can crossfire. Everyone...atm...works, haven't had a problem since the new year. I recently did a recommended PSU check on newegg's website and it recommended 950W PSU. So my question is, is 950W really how much is needed? Am I currently losing performance for each component? Mainly my video cards? Thanks for the help!