New PC is having crazy temp readings, would love some insight

I recently built a new PC and one major concern of mine was cooling so I bought a giant Cool Master Heatsink and plopped it on my mobo. After getting everything installed and ready to go, I noticed that there was some crazy temp readings coming from Open Hardware Monitor.

Here is the reading http://i.imgur.com/DtZqrMW.jpg

Another concern of mine is the weight of the CPU heatsink. It's quite massive and I feel like it could damage the Mobo over time. Is this possible or am I just paranoid?

Thanks a lot people, any help is greatly appreciated