Is my graphics card failing or is the game just buggy?

Out of nowhere starting friday last week WoW has been having some serious issues with graphical glitching and none of my guild members (over 200) have been experiencing any of it and it gets worse if i overclock my graphics card memory. Only time i ever seen anything like this was when my 9800 GX2 was about to die
Here are 2 screenshots i took.

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