Hi, recently **** $25 psu failed and the computer technician which i bought the pc from blames it on me for replacing stock cpu cooler with v8 cooler master. He said it wasn't designed for my motherboard. Well it sure says it supports phenom cpus. Should i trust him that the v8 coolermaster was the problems cause something seems suspicious about the price of the psu. Cause i don't wont to stuff up my pc again (it failed to post and still under going fix)

The shop will blame you before they will blame the product they sold you. I take it you bought the psu from them...