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B550D4U-2T / B550D4U
PM L1 SS
Enable for PM L1 SS and ASPM L1 SS.
Data Link Feature Exchange
Enable or Disable Data Link Feature Exchange, try to disable it if any Legacy Endpoint can
not boot.
Unused GPP Clocks Off
Turn Unused GPP Clocks Off.
Clock Power Management (CLKREQ#)
Enable or disable CLKREQ#.
Adjust APU VDDP
Adjust APU VDDP, stepping is 2.5mV. Vddp = 1.05V +/- N * 2.5 mV, input rang is 0-127.
Adjust V1.8
Adjust V1.8, stepping is 1mV. V1.8 = 1.8V +/- N * 1 mV, input rang is 0-127.
AddCmd MemVref Adjust
AddCmd MemVref Adjust, stepping is VDDIO * (1/256). MEM_VREF = VDDIO * (N /
256), input range is 1-255.
AMD Fan Policy
[Air Cooling] follow platform defined policy; [Water Cooling] force PWM 100%; Selecting
[Fan control] to [Manual] in CBS will override this option.
AMD KVM Mouse Protocol
Switch KVM Mouse Protocol between Absolut/Simple.
NVMe RAID mode
Enable or disable NVMe RAID mode. Please setting the 'PCIe/GFX Lanes Configuration'
item according to the RAID configuration.
S3/Modern Standby Support
Switch S3/Modern Standby. It may be disabled in OS by Down Core or Disable SMT when
S3 is enabled.
Reduce Hardware Support
Enable/Disable Reduce Hardware Support. Please disable PME wakup, when Reduce
Hardware is enabled.
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