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Airtop3 application note - reducing acoustic noise

491 bytes removed, 12:46, 4 November 2019
* With the voltage changes, the capacitors vibrate from Piezoelectric forces causing them to make audible noise.
* The main source for this noise are from the power circuits of both the CPU and internal GPU.
== Acoustic Noise Mitigation in BIOS ==
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
# Advanced --> Setup items availability: Development
# 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 Domain: Fast/16
# Save and Exit
*Disabling == Disable C-state should reduce noise from the CPU's power circuit, see below instructions:states in BIOS ==1. Activate development setup items of the setup menu: - While in splash screen, # Reboot and press '''[F11]''' (instead of Deletenot DEL) in the keyboard.to enter advanced BIOS settings - Go to ''''# Advanced'''' tab --> ''''Setup items availability'''' (first item in Advanced tab) -> Choose '''': Development''''. - <span style="color:#ff0000">'''Caution''':</span> Now the full setup menu is open, including options that can impair the Airtop3 stability or functionality, and items that were not checked or don't work.2. In 'Advanced' tab --> ''''Power & Performance'''' --> ''''CPU -Power Management Control'''' --> ''''C states'''' -> Choose : ''''Disabled''''<br>3. Back to the tabs menu (2x '''[Esc]''' button) -> ''''# Save & and Exit'''' tab -> ''''Save Changes And Exit'''' -> ''''Yes''''.<br><U>'''Note'''</U>: Disabling C-states may reduce power efficiency of the CPU<br>== Disable RC6 in BIOS ==<br>* Using a Discrete GPU should naturally reduce the noise from the internal GPU power circuit but there's also additional configurations that can be done from the development setup menu that may help:1. Enter the development setup menu: - While in splash screen, # Reboot and press ['''F11''']..(not DEL) to enter advanced BIOS settings - Go to ''''# Advanced'''' tab --> ''''Setup items availability'''' -> Choose '''': Development''''.2. In # ''''Advanced'''' tab --> ''''Power & Performance'''' --> ''''GT - Power Management Control'''' -> Change the two options below: - # ''''RC6(Render Standby)'''' -> : ''''Disabled'''' - # ''''Disable Turbo GT frequency'''' -> : ''''Enabled''''3. Back to the tabs menu (2x ['''ESC'''] button) -> ''''# Save & and Exit'''' tab -> ''''Save Changes And Exit'''' -> ''''Yes''''.<br><U>'''Note'''</U>: This configuration may impair the performance of the internal GPU meaning it will not pass it's base frequency.
[[category: Airtop3]]
[[category: Application notes]]