Weird graphics glitches with models, help!

[bic]

I just recently replaced my video card with a radeon hd 4670, and since then I've been having weird pixel problems with models in the game. I have already reinstalled and tried tweaking whatever settings i could in-game. It seems like if i zoom in/out or move, the glitches will go away for a second, but at other times everything on my screen glitches.

Often I can see a npc or player from across the zone because their model glitches with a weird pixel almost 8bit looking outline around them.

pics attached

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