Is your chipset the same as your graphics card? I had that same problem on my other machine (which is exactly the same as the one I have now) except the old one had an ati chipset while this one has nvidia. I used the same graphics card on both machines and it's an nvidia card. The computer I use now with the nvidia chipset has no hitching at all.
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Burple Beergut
60 Dwarf High Priest
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