Sluggish Gameplay Despite Good Hardware

 I am having trouble playing Assassin's Creed 2 for PC. The game play is sluggish and choppy when using higher resolutions despite having the hardware to handle it. I have tried the game on 2 boxes thus far:

Sony Vaio VGN F111FX
1.7GHz Core i7 quad
NVIDIA GeForce 310 with CUDA

HP Elite
2.66 GHz AMD Phenom X4 quad

Both of these machines are more than sufficient to play this game but here is the problem:
When I play the game using higher resolutions it is choppy and sluggish. As I gradually lower the resolutions the game gets faster and better. By the time I get to a point where it is playing like it should I have lowered my nice 1080P resolution to something like 800x600. I don't have this problem with any other games on either of these systems. Dead Space, Bioshock, Empire at War, all work fine. I can't figure this one out. I need some help.
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☠ MASQ ☠Commented:
Do you have it patched to v1.01?
Which operating system are you using?
BoxunloXAuthor Commented:
Both machines are Win 7 and the onle patches that have been applied to the game are what was automatically installed during the install.
Have you tried updating to the latest video card driver. I would say the 9500GS and 310 are a little slow. The videocard is a major bottleneck on your processor at the moment. You might want to try borrowing a better videocard and try it with that.
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BoxunloXAuthor Commented:
I would agree with you if it were not for the fact that both machines handled COD Modern Warfare / Dead Space / Empire Total War / and BIOSHOCK with absoutely no problems. I think the problem lies with the game or a patch for the game or something of that nature.
In your shoes I would try the two following steps:
1.) Update the game to the most recent version
2.) uninstall and reinstall your graphics drivers.

While I'm aware you're having an issue with JUST Assassins Creed 2, and not BIoshock,CoD, etc, sometimes a conflict with a newer game and an older driver may appear in one game, and not another; Particularly a known resource hog like Assassins Creed 2.

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BoxunloXAuthor Commented:
I haven't tried to implement the solution yet but this seems to be the most viable. Thanks!
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