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I don`t know ... you should format , make an OS clean install , install the latest drivers , and see if that works . Also try scanning the card for artifacts on stock clocks with Ati tray tools or something and see how that goes . If the card is not artifacting i don`t what defect it may have . Anyway , is the card on stock clocks or did you overclock it ? IF nothing works , just RMA the card .
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