Ok raman mga generic na PSU(i mean katu below 2K price na PSU) but take note wala ni sila any sort of protection like overvoltage, overloading, shortcircuit etc etc. You may get away with using generic PSU as long as it is underload or not in a heavy use.
But to be safe if u can afford it get Branded PSU. Something like 600 watts+ will last you a long way... HEC is the cheapest branded PSU i can recommend. i have 2pcs 6-yr old HEC 375W SilentOP still powering up my system right now...