Changes
/* Acoustic Noise Mitigation in BIOS */
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== Introduction ==* With the voltage changes, Airtop3 cooling is silent because there are no fans or any other mechanical cooling device* Airtop3 incorporates high power electronic circuits that may emit acoustic noise during operation generally known as "coil whine"* Coil whine is the result of high frequency switching of power circuits that induce piezoelectric force on capacitors and strain on inductors making each vibrate from Piezoelectric forces causing them to make audible noise.In some cases these vibrations are in an audible frequency* Coil whine is common in computers but in most cases it is not audible above the louder fans, which is not the case for Airtop3* Airtop3 hardware is designed using techniques for reducing coil whine, but unfortunately it was not possible to eliminate it completely in hardware* The main source for this noise sources of coil whine are from the the motherboard, graphics card, SSD and power circuits of both supply* Coil whine is often related to the CPU specific workload at a given moment* Adjusting power management policies can significantly reduce coil whine / acoustic noise as detailed below* Worth noting that changing power management settings slightly affects power consumption and thermal performance so the user should consider the trade offs. '''It does not affect reliability and internal GPUwarranty.'''
== Acoustic Noise Mitigation in BIOS ==
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Power and performance --> CPU - Power Management Control --> CPU VR Settings --> Acoustic noise Settings:
## Acoustic Noise Mitigation: Enabled
## Pre Wake Time: 255 (use '+' key to change)## Ramp Up Time: 255 (use '+' key to change)## Ramp Down Time: 255 (use '+' key to change)
## For each of the four sections below (IA VR Domain, GT VR Domain, SA VR Domain, VccIn VR Domain):
### Disable Fast PKG C State Ramp for xx Domain: TRUE
### Slow Slew Rate for GT xx Domain: Fast/16
# Save and Exit
== Disable C-states Reducing graphics related noise in BIOS Linux Mint ==Symptom: when running Linux Mint using Intel graphics, running glxgears, glmark2 or other graphics intensive application results in continuous buzzing soundSolution:
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Setup items availability: Development
# Advanced --> Power & Performance --> CPU GT -Power Management Control --> C states:# RC6(Render Standby): Disabled# Disable Turbo GT frequency: Enabled
# Save and Exit
# Boot into Linux Mint
# Open NVIDIA X Server Settings
# Select Intel (Power Saving Mode), enter root password to apply
# Log off and login
== Disable RC6 Disabling C-states in BIOS ==
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Setup items availability: Development
# Advanced --> Power & Performance --> GT CPU - Power Management Control:# RC6(Render Standby)--> C states: Disabled# Disable Turbo GT frequency: Enabled
# Save and Exit
