Rob, the best program you can use to detect any throttling of the multiplier is i7 Turbo. You can download it here:
http://www.fileden.com/files/2008/3/3/1794507/Turbo.zip
Here's the latest version of RealTemp
http://www.fileden.com/files/2008/3/3/1794507/RealTempBeta_330.zip
The Thermal...