Thank you Mike for the CoreTemp suggestion it works well and it is free. Also shows the load on each processor. When V8 renders all four processors are 95-100 % engaged. With the Q6600, overclocked to 6.67 MHz, a 1.5 hour AVCHD to MPG2 takes 1.5 hours.
The core temp runs around 50-56 C, maximum for the Q6600 is 62C
JK