It’s not just the CPU but a more complex calculation of the speed factor. If it is above 100x it is hidden because it’s meaningless and you have no problems whatsoever. I have a 10th gen i5 NUC with ROCK and when playing 16/44.1 (CD quality) tracks with a DSP convolution filter and volume leveling I still get around 100x, so sometimes it disappears and sometimes it appears showing around 99x. I have to run 192/24 with convolution and volume leveling to get it down to about 55x.
There is much detail about what the indicator means (and what it doesn’t) in this post: