Nvidia geforce gts 250 with problems

A bunch of dots apear on screan! I tested with WinXp, Vista and linux. tried all possible resolutions, the only thing that fixed was changing to 16bit color, but when seeing a movie it apears again. Can anyone help me? this is my sytem:
Q8200
4.00gb ram
4 answers Last reply
More about nvidia geforce problems
  1. Is the card new? Did you remove any previous drivers before installing the 250?
  2. Have the card since Setember 2009. it´s a new and clean OS, with the latest drivers.
    were a picture showing the dots:
  3. No one help me?
  4. try down-clocking the card and see if the dots go away
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