I've got a corsair cx 600 watts psu  it pritty new and I have wiped windows clean and even reinstalled everything. I don't know if it the gpu but it works at gaming and normal computer usage but it did use to mine perfectly but when  I click on the miner now it goes to a black screen and the pc is on most of the time (sometime it goes off). So could it be the gpu because ) I doubt it a psu problem because I tried mining with a rx 460 and it work perfectly it just happens to the rx 470.