In an old movie the stripes (scratches) are usually vertical like rain, wheras these are horizontal.
I don't think the video card is a likely cause of the problem:
PassMark Software - Video Card Benchmarks - Video Card Look Up
(Maybe its drivers? Hardware accelleration?)
Could maybe caused by something like screen tearing?
Is "Wait for vertical blank" selected under
(rightclick >) Options > Preferences > Video > [Video rendering]?
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CPU? What is your screen's resolution and refreshrate?