I ran performance monitor for an hour, while I took a run through the ramparts.
System Performance Report
Computer: W7I-PC Collected: Wednesday, May 20, 2009 7:54:37 PM Duration: 3600 Seconds
Summary Process Total CPU%: 19 Top Process Group: Wow.exe Group CPU%: 18 Total CPU%: 0 Top Process Group:
Disk Top Disk by IO Rate: 0 IO/sec: 8 Disk Queue Length: 33
Memory Utilization: 30 % Memory: 12279 MB Top Process: Wow Private Working Set: 516,656 KB
Network Utilization: 0 % Top Outbound Client: 80.239.233.29 Sent: 60 bytes Top Inbound Client: 80.239.233.29 Received: 651 bytes

Diagnostic Results Performance
Resource Overview
Component Status Utilization Details CPU

Normal 23 % Normal CPU load. Network
Idle 0 % Busiest network adapter is less than 15%.

Further into the report you can see what cores were being used. Core 0 and 1 (or 1 and 2) were hardly used, 2-7 (or 3-8) were used extensively, which reflects the settings set in Innerspace.

Graphically fps on the main screen did not drop below 45 fps.
I am still not sure what i have done in the setting to make such a massive difference in performance.