I need advice for PSU. A week ago, I have bought 400W Infinity power supply from Wise tech rwp and it worked all ok for 2 days and then my pc started restarting itself while running after 10mins or more...Even when I try to reinstall windows, PC keeps on restarting during setup so I plugged back the 300W old power supply and PC is running fine. I called wise tech but they stated there is no warranty for PSU, We will check it if u want but if its not working then u can buy a new one from us. I think this is crap. WHy is there check warranty for a new power supply??? Anyways, guide me abt any good REALIABLE power supply of 400W or more that is easily available in market and has warranty as well..