Snoop Filter; Crystal Beach Features; Route Port 80H Cycles To; Clock Spectrum Feature - Silicon Graphics Altix XE250 User Manual

5: BIOS Settings

Snoop Filter

Crystal Beach Features

Route Port 80h Cycles to

Clock Spectrum Feature

High Precision Event Timer

USB Function

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Select Enabled to eliminate snoop traffic to the graphics port to improve system performance
when running graphics intensive applications. The options are Enabled and Disabled.
This feature was designed to implement Intel's I/O AT (Acceleration Technology) to accelerate
the performance of TCP offload engine (TOE) devices.
Note: A TOE device is a specialized, dedicated processor that is installed on an add-on card or a
network card to handle some or all packet processing of the add-on card. For this motherboard,
the TOE device is built inside the ESB2 southbridge chip. The options are Enabled and Disabled.
This feature allows the user to decide on which bus to send debug information. The options are
Disabled, PCI, and LPC.
If Enabled, the BIOS will monitor the level of Electromagnetic Interference caused by the
components and will attempt to decrease the interference whenever needed. The options are
Enabled and Disabled.
This is a replacement timer for the 8254 Programmable Interval Timer and the Real-time clock's
(RTC) periodic interrupt function. The high-precision event timer (HPET) can produce periodic
interrupts at much higher resolutions than the RTC interrupt function. The HPET is used to
synchronize multimedia streams and provide smooth playback which reduces the need to use other
timestamp calculations such as the Intel x86 RDTSC instruction.
Select Enabled to enable the function of USB devices specified. The settings are Enabled and
Disabled.
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