Hello! I have the specific MOBO ( as the title said ) and the temperature is 55° C
My Tower is a simple tower... 1 fan only.. i will buy a new PC and the temperature will go to 35-40° C i know... one of my friends have same pc same specs, but with COOLERMASTER COSMOS S tower with 20° C less than me..
What is 55C ....MoBo sensor, NB sensor, SB sensor ?
Have the same MoBo on a build upstairs ..... right after building, it had NB temp which was rather high ..... settled in after a few days to low 30's. Assumption was uneven TIM application on MoBo assembly ..... I was going to disassemble, remove heat sinks and re-apply but temps settled out after a few thermal cycles.....
In my instance I am pretty tedious about cleaning so 3C~5C is pretty common for an average cleaning 6MO's+, and my house the temps range from 24C to 26C which is another factor.
If temporarily removing the side panel reduces the temps by another 5C or more then you need to rethink your fans positions and/or number including the speeds. Alternatively, a different case as I mentioned with top-out fans out.
Fortunately, 50C nor 55C is going to cause instability.