Err... 380W ought to be just about enough, really. The manual states that a minimum of 350W for Athlon64 3400+, 2x 6600GTs, 2x DDR DIMMs, 2x HDDs, 1x optical drive, 1 PCI card and 3 USB devices. Well, if the PC is completely barebone, with only the CPU and RAM connected, then you'd surely expect...