A quality 350w PSU is far superior to a generic higher rated PSU. I had a 400w powmax PSU, I thought wow, 400w that should be plenty. Then it blew and took my $180 motherboard with it. I replaced it with a 350w enermax, which powered far more than the 400w powmax did. Do not skimp on the power supply if you value your hardware. Rather than just looking at the wattage, the 12v rail is a good indicator as well, and so is the weight, if the PSU is really light weight, or has less than 18a on the 12v rail, you probably want to use a differant one. My 420w thermaltake that I use in my back up rig has 18a on the 12v rail, compared to 26a on the 350w enermax. This is my second thermaltake, as the first one died after only 2 days..