Hey guys, first timer on here. Normally I can figure this stuff out on my own but am too busy and a little stumped. I built my own pc a few years back. Specs: Asus P5Ne Intel Duo Core2 3.0 and 4gb OCZ Platinum RAM with an Nvidia GeForce 7900 GS OC PCIe. Now, I have 4 hdds, 2 which are IDE and the other two are SATA along with my DVD/CD-Rom. I recently upgraded my video card to a Zotac GeForce GTX 660 2GB PCIe and when I booted up my system none of my hard drives other than the IDE's showed up. I checked my wiring to ensure that all cables were correctly plugged in, and they were. My next thought was my PSU? After going over a few "calculator" websites to determine how much wattage I required, 3 separate sites stated between 413w-430w. My PSU is 650w....so I'm lost. Any help guys/girls?