Seems we typed at the same time aristide1
Yes the temps show in speedfan, rivatuner, etc. temp should not be too high as the fan doesn't speed up (fan in steps off-low-high) until 75C and average running is 69-70, one strange thing is the exact same temp for both cores so something is not correct. I found a picture somewhere that showed the whole thing as a unit so i think its like a regular x2 core board. Voltage regulation is non-existant Dell bios is so limited, and Rivatuner does not support mobiles properly, have not found anything to tweak with. Speedfan cannot read voltages of the gpu or motherboard.
Cpu is a core2duo T7700 2,4GHz cipset is PM965
I didn't try Prime95 as its gpu not cpu might give it a go, but I think the OS is needing a refresh as first step at the moment