E8400 temp sensor is dead?

d3one

Honorable
Jun 21, 2012
129
0
10,690
You can see the one of the cores are -27°C
pxe8.png

I have tried difference programs like HWmonitor and real temp and they showing the same like core temp one of the cores are -27°C or -26°C
I have replace the thermal grease with this

Do you think the temp sensor is dead?