SLI/Perfect 'Heartbeat'

[unreasonable]

Glad that was some help - just another thought since you are a n Nvidea user:

Does your current stuttering increase in frequency and eventually - after an hour or so - lead to the appearance of an "OpenGL error" message? This is a known Nvidea only problem which stems from some incompatibility between IL2 code and Nvidea which was never fixed. The work around is to set up a hotkey for recording a track, then at the beginning of the mission start recording and then immediately stop recording. This somehow "resets" the memory and prevents the lock up.

If your stuttering is anything to do with memory management issues this might help even if you are never locking up - easy to try anyway as no settings need to be changed. If you use scroll lock you can tell from the light on the keyboard whether you are recording or not so you need not worry about inadvertently filling up your memory with a track.