650i or 630i evga?

[alias_1ab]

jinho, my recommendation to you is to get a better brand PSU. Ultra and Aspire are not exactly top notch quality by any means and saving $30-40 now isnt going to help you a year later. i say this from experience because the Ultra X-Connect 500W PSU i bought a few years ago for $60 stopped working correctly after i installed a 8800GTS 320mb in a Evga 680i SLI board w/ E6600 cpu. my system was pushing that PSU to its limit. i put that same power supply into another system that has much lower power requirements and the computer would just turn itself off after a few minutes. I ended up replacing the PSU with an OCZ GamexStream 700W psu which costs me around $100. havent had a hiccup since.