Skyrim gives most people stuttering. I find it's especially bad if I'm looking at the ground, like when picking ingredients. Oddly, if you go to 3rd person view, the game is smooth as silk.
I'm not sure bout Deus: Ex, I played it a little and it was fine for me, but maybe david is correct that it also suffers from stuttering.
There really isn't a ton you can do about it besides a graphics driver reinstallation and maybe make sure all your chipset drivers as well as mobo BIOS are up to date.