Sapphire hd6850 problem

my specs
biostar ta790gx128 mobo
Phenom x4 9950 cpu
Currently hd 4850 gpu but the new one is sapphire hd 6850
550 watt psu.

i bought a 6850 and it spun up to full speed and just sat there so i returned and got a new one. fan doesnt spin all the way now but still get no video. i updated bios. tried wiping all old drivers and even tried the molex adapter for power.

What is wrong?!?!
2 answers Last reply
More about sapphire hd6850 problem
  1. have you tried both dvi ports on the card?
    are you receiving any beeps when booting?
  2. alvine said:
    have you tried both dvi ports on the card?
    are you receiving any beeps when booting?


    i have tried all ports. i get no beeps because i have no speaker on my mobo
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