Where are the temp sensors on Gigabyte N650SLI-DS4?

[vulcan4d]

I just got this motherboard for serious overclocking. However my temperatures are so good that I question my temperature sensors. I got the Arctic Freezer 7 Pro cooler on my E6300 and at stock speeds I'm running 18* idle and 23* load. Ok that's sweet but maybe too sweet though the cooler is cold to the touch? The heatsink does seem to sit properly, I sure hope it is. Is the temp sensor in the socket or somewhere outside? If its inside then I guess it's accurate but if not I gotta double check this. Thanks.