I have been using OCZ 500W StealthXStream for the past 2 years and it is rock solid. Paid $19 after rebate. So, you must have got a bad one. Always replace power supply first when t-shooting.
RYZEN 5 2600|RADEON 570| |ASRock X370 Killer|DDR4@2800Mhz||Corsair SPEC-05 Case|AOC G2590FX 24.5''144hz 1ms|