xafier:
Well, that is nothing you necessarily need to know, so I simply inform you because I know it
You can check it once you have the new thermal grease.
As for the A64, well I recall that not all had it and only X2 models had it in series. A64 should not have the sensor inside. And even they are inside the guys are a bit different so you can not compare it, like the performance differs =P