Asus PS4 - Manual (Page 86)

5-22 Chapter 5: BIOS setup
NB-SB Port Features
Press to display the sub-items.
NB-SB Link ASPM [L1]
Configuration options: [Disabled] [L1]
NP NB-SB VC1 Traffic Support [Disabled]
Configuration options: [Disabled] [Enabled]
Complicance Mode [Disabled]
Configuration options: [Disabled] [Enable]
PCIE Slot 1/PIKE Slot/SB Core Setting
Select an item, and then press to display its sub-items.
Powerdown Unused lanes [Enabled]
This item is available only for the PCIE Slot 1/PIKE Slot Core Setting.
Configuration options: [Disabled] [Enabled]
Turn Off PLL During L1/L23 [Enable]
This item is available only for the PCIE Slot 1/PIKE Slot Core Setting.
Configuration options: [Enable] [Disabled]
TX Drive Strength [Auto]
Configuration options: [Auto] [26mA] [20mA] [22mA] [24mA]
TXCLK Clock Gating in L1 [Enable]
Configuration options: [Enable] [Disabled]
LCLK Clock Gating in L1 [Enable]
Configuration options: [Enable] [Disabled]