Hmmmmmmm i got a 1250 ocz PSU and its only 3 moths old... Cant be that? 
Wow ,don t you think it s a little to much ,no wonder it doesn t boot properly,the load is too low.
Are you using a tri-fire or a crossfire with dual GPU cards ?!
If not ,get a ~750W PSU ,OCZ will do if it s the high end Fatality.