Cpu_Io Voltage; Load Line Calibration; Psys Slope; Psys Offset - Supermicro C7Z270-CG User Manual

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CPU_IO Voltage

Use this feature to calibrate the CPU I/O Voltage. Select from these

values: 0.975V, 1.15V, 1.30V, and 1.50V.

Load line calibration is vDroop, which is the tendency for a CPU's vCore

to drop when going from an idle state to a load state. Set this feature

to auto, or select a specific level to reduce vDroop. The options are

Disabled, Level 1~7, and Auto.

PSYS Slope is defined in 1/100 increments and uses the BIOS VR mailbox

command 0x9. Valid range is 0-200. For example, enter 125 for a 1.25

slope. Enter 0 for AUTO.

PSYS Offset is defined in 1/4 increments and uses the BIOS VR mailbox

command 0x9. For example, enter 100 for a 25 offset. Valid range is

0-255.

The value is defined in 1/8 Watt increments and uses the BIOS VR mail-

box command 0xB. For example, enter 1000 for a 125 Watt PMax value.

Valid range is 0-8192. Enter 0 for AUTO.

Select Enable to help mitigate acoustic noise on certain SKUs when the

CPU is in deeper C-State. The options are Disabled and Enabled.

When the item above is set to Enabled, the following can be configured:

IA VR Domain

Disable Fast PKG C State Ramp for IA Domain

Select False to leave Fast ramp enabled during deeper C-States. Se-

lecting True will disable Fast ramp during deeper C-States. The options

are FALSE and TRUE.

4-11

Chapter 4: AMI BIOS

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