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Chapter 3: BIOS setup
CPU Performance Settings
The items in this menu is setting for CPU Ratio/Features.
CPU Ratio [Auto]
This item allows user manually adjust the maximum non-turbo CPU ratio. The value will be
limited to CPU-based or factory settings. Adjusting the CPU Ratio value will change CPU
Performance Settings.
Use the <+> and <-> keys to adjust the value. The values range from 12 to 57 with 1 interval.
[Values 12~32] Presets
Enhanced Intel SpeedStep Technology and Turbo Mode to
[Disabled] but can be adjusted. Turbo Mode Parameters settings is limited
to
CPU Core Current Limit
.
[Values 33~57] Resumes full adjustment for Turbo Mode Parameters but disallows
conguration for Turbo Mode.
Enhanced Intel SpeedStep Technology
®
[Enabled]
Enhanced Intel SpeedStep Technology
®
allows the system operation system to dynamically
adjust processor voltage and cores frequency, which can result in decreased average power
consumption and decreased average heat production.
Conguration options: [Disabled] [Enabled]
Turbo Mode [Enabled]
It automatically allows processors cores to run faster than the base operating frequency if it’s
operating below power, current, and temperature specication limit.
Conguration options: [Disabled] [Enabled]
Turbo Mode Parameters
Long Duration Power Limit [Auto]
This item is Power Limit 1 in Watts. Default setting of this item is TDP (130W). For
Sandy Bridge-E, Turbo Ratio can be kept a time duration exceeding TDP for maximum
performance. Any value under 255 can be programmed. Use the <+> and <-> keys to
adjust the value.
Long Duration Maintained [Auto]
This item is Power Limit 1 Time in second. The value can vary from 1 to 32, which
indicates that the time window for Turbo Ratio over TDP should be maintained. Use the
<+> and <-> keys to adjust the value.
Short Duration Power Limit [Auto]
This item is Power Limit 2 value in Watts. It is the second power limit to provide rapid
protection when package power exceeds Power Limit 1. Default setting is 1.25 times
Power Limit 1. Intel recommends that the platform must be capable of supporting over
Power Limit 2 for up to 10 msec. ASUS board can support over Power Limit 2 for a long
duration. Use the <+> and <-> keys to adjust the value.
Additional Turbo Voltage [Auto]
Maximum additional voltage can be applied to the CPU when Turbo Boost is engaged.
Use the <+> and <-> keys to adjust the value.
CPU Core Current Limit [Auto]
This item allows user to enter CPU Core Current Limit, unit in 0.125A. Use the <+> and
<-> keys to adjust the value.
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