pc freezing w/ new hd3870 card

i recently replaced a x1950xt card w/ a visiontek hd3870 card. since i replaced it, my computer freezes up when playing games usually after about 30 minutes of playing. i only play racing games so they are not super demanding. i'm getting over 100fps at all times w/ the settings i'm using, so i'm not over working the card, and the temps are never going over 70c.

i've tried installing various versions of ati's ccc, and am currently not using it at all, after removing it and using a registry cleaner to clean up after it. all i have now is the driver and rivatuner to control the fan, and it still does the same thing, although it does seem to take a little longer for it to happen now.

any ideas?
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More about freezing hd3870 card
  1. what do you have the fan set at should be no less than 60%
  2. i'm using a progressive fan speed to temp setup:

    fan speed/temp
    40% @ 45-55
    50% @ 56-60
    60% @ 61-65
    70% @ 66-70 <= while racing it tends to sit here, right at about 68-69 degrees
    80% @ 71-75
    90% @ 76-80
    100%@ 81-100
  3. does it work? i have a 3870x2 and auto settings dont work for me and i have read others with same problem try fixed sitting @ 60% let me know thanks
  4. yes it works great, but you cant use the setup that comes w/ rivatuner, you have to set it up a more complicated way for it to work w/ this card anyhow.

    here is the link to the instructions showing how to set it up:

    http://forums.overclockers.com.au/showthread.php?t=686008
  5. What's the power supply?

    actually nevermind, the 3870 should draw less power than the x1950xt that thing was a beast.
  6. ps is corsair hx520
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