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Airtop3 application note - reducing acoustic noise

1,027 bytes added, 08:04, 5 November 2019
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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
# Save and Exit
== Disable Disabling C-states in BIOS ==
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Setup items availability: Development
# Save and Exit
== Disable Disabling RC6 in BIOS ==
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Setup items availability: Development