Hi all,
Here are my results. Measurements were done with CoreTemp 0.99.1 for CPU and RivaTuner for GPU.
BFG GeForce 8800GT OC 512 MB (stock clocks: 625/900)with Arctic Cooling Accelero S1 and turbo module
Load testing was done with GPU Folding (For HWC of course

)
Pre-IC7
Compound: Arctic Cooling MX2
Ambient Temp: 20C
Idle Temp: 41C
Load Temp: 47C
IC7
Ambient Temp: 20C
Idle Temp: 41C
Load Temp: 44C
No difference on idle temp but -3C difference under load. CPU: E8400 at stock speed and cooled with Intel HSF of a Q6600. Pre-IC7
Compound: Arctic Silver 5
Ambient Temp: 20C
Idle Temp: 32C
Load Temp: 48C
IC7
Ambient Temp: 20C
Idle Temp: 31C
Load Temp: 47C