Chapter 6: BIOS
65
GT - Power Management Control
RC6 (Render Standby)
Use this feature to enable render standby support. The options are Disabled and En-
abled.
Maximum GT frequency
and 1200Mhz (RP0). Any value beyond this range will be clipped to its min/max sup-
ported by the CPU. The options are Default Max Frequency, 100Mhz, 150Mhz, 200Mhz,
250Mhz, 300Mhz, 350Mhz, 400Mhz, 450Mhz, 500Mhz, 550Mhz, 600Mhz, 650Mhz,
700Mhz, 750Mhz, 800Mhz, 8520Mhz, 900Mhz, 950Mhz, 1000Mhz, 1050Mhz, 1100Mhz,
1150Mhz, and 1200Mhz.
Disable Turbo GT frequency
Use this feature to disable Turbo GT frequency. If set to Enabled, Turbo GT frequency
becomes disabled. If set to Disabled, GT frequency limiters will be removed. The options
are Enable and Disable.
VT-d
Select Enabled to activate Intel Virtualization Technology support for Direct I/O VT-d by
reporting the I/O device assignments to VMM through the DMAR ACPI Tables. This feature
greater reliability, security and availability in networking and data-sharing. The options are
Disable and Enable.
SW Guard Extensions (SGX)
Select Enabled to activate the Sfotware Guard Extensions (SGX). The options are Disabled,
Enabled, and Software Controlled.
Select Owner EPOCH input type
There are three Owner EPOCH modes (each EPOCH is 64 bit). The options are Select
Owner EPOCH input type, Change to New Random Owner EPOCHs, and Manual User
PRMRR Size
This feature appears if SW Guard Extensions is set to Enabled. This BIOS must reserve
a contiguous region of Processor Reserved Memory (PRM) in the Porcessor Reserved
Memory Range Register (PRMRR). The options are 32MB, 64MB, and 128MB.
GNA Device (B0:D8:F0)
Use this feature to enable SA GNA device. The options are Enable and Disable.
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