Even though your wattage may be high, your PSU might be crappy. I run a AGP 6800GT at work on a Generic 350W PSU in my work PC, so the 500W thing is a load of bull.
Plug your new card into a power line that has nothing else attached to it, so its the only thing on that lead.
Have you got another PC you can try the card on before forking out on a new PSU? As maybe its just duff and you can send it back to the seller.
Plug your new card into a power line that has nothing else attached to it, so its the only thing on that lead.
Have you got another PC you can try the card on before forking out on a new PSU? As maybe its just duff and you can send it back to the seller.