I found that in my AMD hackintoshs (FX-6300 & Ryzen 1700X) this value ( BusSpeedkHz) will affect the following:
1. Stability of Audio/video output
2. Performance scores of cinebench & geekbench
3. Panic or reboot before login to desktop during booting of Clover
4. Response of sleep/wake-up functions
For example:
In my Ryzen 1700X hackintosh I found it should be set BusSpeedkHz=200010 (or 200001 to 202000) to get stable both audio and video output as well as better score in Cinebench R20. Exactly 200000 will get instant reboot before login desktop. But only set to 100000 can get normal sleep/wake-up function unfortunately with unstable audio/video play in Firefox and very poor performance score by cinebench R20 !
In my FX-6300 hackintosh I must set config.plist->CPU->BusSpeedkHz=200000 to get the correct frequency for audio output without crack.
Just for your reference.