Its a decent 650 watt power supply. I think it might be an older model. Im pretty sure the antecs neos are now 620w.
Can you get it cheap or something? It should be fine, im using a 5yr old psu thats still kicking.
Forgot to mention. My brother is still running an antec neo 430 i gave him that i bought in 2006. Quiet as, never skipped a beat.