SOME OF THESE THINGS ARE RISKY, LIKE BIOS STUFF!!
If you don't know what you are doing with the BIOS you can wreck your computer.
A. Tested system to see if I needed to bother (I did):
Downloaded latencymon (seems to have been updated for Windows 10 based on what's on their site):
http://www.resplendence.com/downloads
Basic fixes and interpreting results of Latencymon:
https://www.native-instruments.com/.../windows-78-tuning-tips-for-audio-processing/
B. BIOS alterations -- remember, these are RISKY, especially turning off thermal throttling and other CPU protections
1. Updated BIOS (on my computers needed USB flash drive formatted for FAT):
2. Turned off Speedstep
3. Turned off Turbo boost / Advanced Turbo
4. Turned off Thermal Throttling / CPU Thermal Throttling
5. Turned off CPU C States Support and / or individual C-states related to CPU
6. Disabled onboard audio from motherboard (I'm using separate audio card so don't need it)
7. Turned off Isochronous whatever-it-is. I quote from an internet post:
"Isochronous refers to time-bound processes, such as synchronizing audio and video in a multimedia stream or ensuring that data is transferred across a network or data bus (like a northbridge or southbridge on a motherboard) with similar constraints. It prioritizes threads or calculations between the IOH and ICH. So basically, the more important tasks will be determined and executed in Isochronous Mode. So if it's enabled, it means time bound processes are given priority first while if it is off FIFO rule applies. I think all these "features' on the board are just marketing crap and don't really show any real world advantage or disadvantage. If you're OCing, best to keep it disabled!"
8. I checked the BIOS and the "Advanced CPU Features." The CPU Clock Ratio was set to 15, which yields a CPU speed of 2.00 GHz. I changed it to 23 (max is 24) and now the CPU Frequency is 3.06 GHz, approximately what it's rated.
9. Turned off hyperthreading on at least one computer -- honestly can't remember if I did this on all of them.
10. Chimuelo (if I understood him correctly) recommends turning off EIST