Hd 3870 not working the same

i have a visiontek hd 3870 512mb gddr4 and its not working rite..i have 600watt psu by ultra ls bought it yesterday and is working fine..the problem is yesterday i was benching my videocard and i would get like 400 frames all the time..now i only get 100 to 200 fps..everything is connected rite..i reinstalled the drivers and everything..

psu- ultra ls 600
cpu- amd 5000+ 3.0ghz
2gb corsair 800mhz
120mm rear fan
120 mm cpu fan
80mm side fan
2x80mm front fans
2hdds connected-maxtor sata 500gb and a 80gb seagate
hd 3870 512mb
dvd cd samsung drive

i really think the card is not using the right amount of power..wut do you guys thinks? any help thanks
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More about 3870 working same
  1. It could be

    1) your PSU is going bad already.
    2) Your videocard is going bad. (videocards over time lose there power)
    3) is it overheating?
    4) do you have a virus? run a virus scan and a spyware scan.
    5) defragment your computer.

    that's all I know of.
  2. i just got the card like 1 week ago and the psu yesterday,,the card doenst seem to be sucking the right power out of the psu
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