User Manual

Chapter 5: BIOS Setup
5-62
Turbo Mode [Enabled]
Allows you to enable or disable processor Turbo Mode (requires EMTTM enabled as
well).
Conguration options: [Disable] [Enable]
CPU Flex Ratio Override [Disable]
Allows you to enable or disable CPU Flex Ratio Programming.
Conguration options: [Disable] [Enable]
The following item appears only when
CPU Flex Ratio Override
is set to
[Enable]
.
CPU Flex Ratio [23]
Non-Turbo Mode Processor Core Ratio Multiplier.
Conguration options: [0] - [100]
GPSS timer [500 us]
P-state changes hysteresis time window.
Conguration options: [0 us] [50 us] [500 us]
Perf P-Limit
Perf P-Limit Differential [1]
Parameter used to tune how far below local socket frequency remote
socket frequency is allowed to be. Also impacts rate at which frequency
drops when feature disengages.
Perf P-Limit Clip [1F]
Maximum value the oor is allowed to be set to for perf P-Limit.
Perf P-Limit Threshold [F]
Uncore frequency threshold above which this socket will trigger the feature
and start trying to raise frequency of other sockets.
Perf P-Limit [Enable]
Allows you to enable or disable Performance P-Limit.
Conguration options: [Disable] [Enable]
Hardware PM State Control
Hardware P-States [Native Mode]
Allows you to switch between Hardware P-States mode.
[Disable] Hardware chooses a P-state based on OS Request (Legacy
P-States).
[Native Mode] Hardware chooses a P-state based on OS guidance.
[Out of Band Mode] Hardware autonomously chooses a P-state (no OS guidance).
[Native Mode with no Legacy Support] Hardware chooses a P-state based on OS
guidance (without Legacy support).
The following item is available only when
Hardware P-States
is set to
[Native]
.
HardwarePM Interrupt [Disable]
Allows you to enable or disable Hardware PM Interrupt.
Conguration options: [Disable] [Enable]