CPU Utilisation not showing correctly

[Riksta]

I have been using AIDA64 for a while now, I am still using an old Logitech G19S keyboard and I find it handy to have some monitoring on its small screen.

The other day I purchased a new PC and got everything up and running on it, however something that bugged me a bit on my old system is also happening on this one.

As my screen is fairly small, I use just the overall "CPU Utilisation" rather than each individual core.  However, this rarely goes above anything around the 10% mark, even when the performance monitor in task manager is saying that it is fairly high.  For example, playing games, it will show utilisation of around 2-5%, when task manager is showing overall utilsation as up around the 70-80% mark.  

Am I using the wrong sensor item, or is it just bugged?  The older PC was a Ryzen 5 3600, current is a Ryzen 7800X3D.