Possible graphics stuttering fix ( worked for me) would like soem feedback if it fixes anyone elses problems I have found a tweak to the ntfs file sytem that happened to fix my stuttering issue.. was so bad I could barely play (core 2 duo e7200 OC'd 4.03 8GB of ram 8800 GT 512MB)

This fixed it for me Type in the following command to increase the cache setting:

fsutil behavior set memoryusage 2

To check the current value, type in this command:

fsutil behavior query memoryusage

To change the setting back to the default, use this command:

fsutil behavior set memoryusage 1
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command prompt is in the all programs/accessories menu ( sorry for the long delay for me to get back to you...) mine was set at 0 as well and after changing to 2, stuttering problem is gone I can play on extreme settings @ 1680x1050... after checking default, if it is set at 0, then go back and change to 2.. and I am 90% sure your problem goes away.. what is being altered is the file system cache buffer. make sure to right click it and choose run as administrator otherwise you cannot change system settings I hope this helps.. let me know if it works for you