Bah, after putting the temp sensor on top of the heatsink (do you guys get what I mean?), and with the fan on full blast, this is what I got:
Idle -
COMPUTER SENSOR: 31C
EXTERNAL SENSOR: 25C
Full Load for 5 minutes-
CS: 46C
ES: 28C
...3C rise only? Is that even possible? Remember, this is only a Venice E3 3000+ on stock voltage in a well ventilated (open) case...