hey guys So i got my new machine all built I connected everything up, I hit the power button, the heatsink/fan comes on, the computer starts whirring, and it look as though it is about to start up and then it switches off after a split-second. I've double checked everything, I'm using an Antec truepower 550watt PSU The configuration of my box : Mobo :: Asus M2N-SLI Deluxe CPU :: AMD Athlon 64 X2 4600+ Dual-Core HD :: SATA WD 250GB CD/RW/DVD/RW :: Plextor PX-755SA (SATA) Video Card :: Asus GeForce 7600 GS 512mb RAM :: Samsung Dual Channel DDR2 533 PC2-4200 (four 1GB chips = 4GB) the green light on the mobo is on, i hit power she powers up fans spin then it just doesn't hold the power what i have done so far to see whats wrong: I checked the PSU with my other machine, i know the PSU works fine. I made sure the mobo wasn't touching the case anywhere. I took it all apart and checked connections, then just put one stick of RAM in and the video card, plugged the mouse and keyboard in and powered it up. same thing, it gets juice the fans roll then it just goes out, it won't hold power. could it be the RAM?