http://www.fileden.com/files/2008/3/3/1794507/Turbo.zip

I wrote this little program to try and keep a closer eye on the multi. At full load when Turbo mode first starts to cycle on and off, some tools might not accurately report your multiplier. The i7 Turbo tool uses high performance timers within Intel Core i7 CPUs to accurately calculate the multiplier at full load.