TMP2 sensor running hot after second fan install

[perfectm]

Hi guys,

Last night I was installing a second fan onto my heatsink for push-pull and I think I might have bumped something in a bad way. My system is about a month old, i5 4670K with GA-Z87MX-D3H board. My system has always run stable and cool and my fans are low and silent. This morning I noticed that it was making more fan noise than usual so I opened up CPUID and saw that the TMP2 sensor was hanging around 50C (120F) at idle while all other sensor spots were in the 30s. The fans would ramp and kick it down a few degrees and then it would come back up and repeat over and over.

First question, could I have bumped something during the installation? My heatsink is the coolermaster 212 and it did wiggle a bit during install. I have a spare thermal paste, so if removing it, cleaning the old paste and re-installing it could help, I can do that tonight.

Second, Is the TMP2 sensor the northbridge? I've searched and found conflicting results that it could be BM or it could be VRM.

Third, Any other ideas? I've seen suggestions for a separate NB heatsink/cooler but that seems like overkill for something that worked fine yesterday.

 

[popatim]

Cleaning off the old paste and reinstalling is what I would do second.
First I would make sure both fans are blowing air in the same direction. I've had people think they installed it right only to find both fans blowing into the heatsink instead of one blowing in and the other blowing out.