You still only have 6 GB of usable RAM total. As per our recent PM discussion, I thought you had found a BIOS based solution for that since you actually have 8 GB installed but 2 GB of it was being totally reserved for something else. Was that solution ever implemented or was it not effective?
The thing is, at the time you launch the game, you have just under 3 GB to work with. That should theoretically be okay for TS3, but in reality once the game starts calling for 2 GB or more, at some point Windows will likely start "paging out" (using virtual memory) to preserve the running of any active programs and that stands to have a decidedly negative impact on game performance.
