Yes a 650 is fine without a massive gaming video card (you should just use something like a GT520, or an HD 6450). Just get a quality PSU. I use a Corsair HX850 on my gaming computer, and a TX650 on my home server. The main difference, is the HX has modular internal connectors. You only connect what you need. They make a 650, 750, 850, and 1000 in the TX and HX line.