Power failure caused weird, artifact like things

So I had a power failure today and after that my computer's been acting strange, in 2D everything's alright, in 3D weird black "stripes" appear which can be seen closer on the video I made. http://www.youtube.com/watch?v=a2IpB5JR_CY

Any ideas? Does this kind of thing fall under guarantee?
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  1. Since I can't edit the previous post for some reason, I will add the information here.
    Spec:
    HD5850
    i5 750
    4 GB DDRAM3
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