Is my system over heating?

[Den-O]

My monitor suddenly goes "no signal" but my PC still running though i can't even shutdown it during the casing button. mouse and keyboard have no power too, just a running PC . I'm thinking that this is overheating but im not sure. It happens everyone. Can anyone enlighten me

Here's my HW monitoring

 

[Someone Somewhere]

Those systin and auxtin temps are too high - your NB might be overheating.

 

[Den-O]

what is NB? and what should i do ?

btw my latest HW monitoring

 

[Someone Somewhere]

NorthBridge is the chip under the big heatsink next to your CPU - if you have a small fan lying around, that's a good use.

Dusting it is the other thing that could help, or reducing any OCs you have done to the FSB or DRAM.

 

[Den-O]

I did clean the dust, nothing helps, also I dont OC
I tried resetting my CPU and video card, re-install windows, update drivers.