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I'm having some issues with my PC rendering images. Sometimes the screen shows only half of the picture and sometimes it shows lines all over the screen.

This happens after waking the computer from sleep.

Are there specific tests that can show if my graphic card is failing? A test similar to memory tests?

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marked as duplicate by Ƭᴇcʜιᴇ007, Dennis, 8088, Dave M, Windos Mar 10 '13 at 20:12

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

There are none that I know of. The best way to be sure is swap the card e.g. with an old one if you can. – André Stannek Mar 10 '13 at 15:59
Not precisely duplicates of either question, but the answer is to stress test GPU and VRAM. – Dennis Mar 10 '13 at 19:57

Graphical weirdness after waking from sleep sounds like a driver issue, or other wonky software.

Still, Here's a link to some GPU test software: MemtestG80, and MemtestCL that may or may not work in your case (MemtestG80 is Nvidia specific, though MemtestCL is not but has it's own requirements). Linux, Windows and OSX variants.

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