Could you be a little more spesific? where does the lockup? whatkind of a powersupply you got there? and the rest of your system setup etc?
Yes that sounds like the video card is either overheating or has already been damaged by overheating.
Good choice on sending to repairs, as there is not much we can do about it, I had a similar problem with a out of warranty card I have and I didn't want to pay for repairing it so I adjusted the clock speeds lower - under clocked - running slower than meant to. I also replaced the thermal grease and the card worked fine again. Just little slower than out of the box but the cost of repair to me was around 5$ (the price of a thermal grease tube)
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Thanks - System is a year old Dell with XP Home Edition. Suddenly began showing colors and squiggly lines. Had to push power to reset. I just purchased another card which works fine. Sending card back in for repairs.
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