Difference between revisions of "Airtop3 application note - reducing acoustic noise"

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* With the voltage changes, the capacitors vibrate from Piezoelectric forces causing them to make audible noise.
 
* 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.
 
* 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 C-state should reduce noise from the CPU's power circuit, see below instructions:
+
== Disable C-states in BIOS ==
1. Activate development setup items of the setup menu:
+
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
- While in splash screen, press '''[F11]''' (instead of Delete) in the keyboard.
+
# Advanced --> Setup items availability: Development
- Go to ''''Advanced'''' tab -> ''''Setup items availability'''' (first item in Advanced tab) -> Choose ''''Development''''.
+
# Advanced --> ''''Power & Performance'''' --> ''''CPU -Power Management Control'''' --> ''''C states'''': ''''Disabled''''
- <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.
+
# Save and Exit
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 & Exit'''' tab -> ''''Save Changes And Exit'''' -> ''''Yes''''.
+
== Disable RC6 in BIOS ==
<br><U>'''Note'''</U>: Disabling C-states may reduce power efficiency of the CPU
+
# Reboot and press F11 (not DEL) to enter advanced BIOS settings
<br>
+
# Advanced --> Setup items availability: Development
<br>
+
# ''''Advanced'''' --> ''''Power & Performance'''' --> ''''GT - Power Management Control'''':
* 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:
+
# ''''RC6(Render Standby)'''': ''''Disabled''''
1. Enter the development setup menu:
+
# ''''Disable Turbo GT frequency'''': ''''Enabled''''
- While in splash screen, press ['''F11''']..
+
# Save and Exit
- 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 & 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: Airtop3]]
 
[[category: Application notes]]
 
[[category: Application notes]]

Revision as of 12:46, 4 November 2019

  • This application note applies to Airtop3.
  • 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

  1. Reboot and press F11 (not DEL) to enter advanced BIOS settings
  2. Advanced --> Setup items availability: Development
  3. Advanced --> Power and performance --> CPU - Power Management Control --> CPU VR Settings --> Acoustic noise Settings:
    1. Acoustic Noise Mitigation: Enabled
    2. Pre Wake Time: 255 (use '+' key to change)
    3. Ramp Up Time: 255 (use '+' key to change)
    4. Ramp Down Time: 255 (use '+' key to change)
    5. For each of the four sections below (IA VR Domain, GT VR Domain, SA VR Domain, VccIn VR Domain):
      1. Disable Fast PKG C State Ramp for xx Domain: TRUE
      2. Slow Slew Rate for GT Domain: Fast/16
  4. Save and Exit

Disable C-states in BIOS

  1. Reboot and press F11 (not DEL) to enter advanced BIOS settings
  2. Advanced --> Setup items availability: Development
  3. Advanced --> 'Power & Performance' --> 'CPU -Power Management Control' --> 'C states': 'Disabled'
  4. Save and Exit

Disable RC6 in BIOS

  1. Reboot and press F11 (not DEL) to enter advanced BIOS settings
  2. Advanced --> Setup items availability: Development
  3. 'Advanced' --> 'Power & Performance' --> 'GT - Power Management Control':
  4. 'RC6(Render Standby)': 'Disabled'
  5. 'Disable Turbo GT frequency': 'Enabled'
  6. Save and Exit