System BIOS Intel® 5000 Series Chipsets Server Board Family Datasheet
Revision 1.1
Intel order number D38960-004
28
Error Severity System Action
Processor system bus
speeds not identical
Halt The BIOS detects the error condition and responds as follows:
Logs the error into the system event log (SEL)
Lights the front panel system fault LED
Lights the CPU fault LEDs
Does not disable processor
Displays “0195: Processor System Bus speed mismatch
detected” message in the error manager
Halts the system
3.2.10 Hyper-Threading Technology
Intel
®
Xeon
®
processors support Hyper-Threading Technology. The BIOS detects processors
that support this feature and enables the feature during POST. BIOS Setup provides an option
to enable or disable this feature. The default is enabled.
The BIOS creates additional entries in the ACPI MP tables to describe the virtual processors.
The SMBIOS Type 4 structure shows only the physical processors installed. It does not
describe the virtual processors.
Because some operating systems are not able to efficiently utilize the Hyper-Threading
Technology, the BIOS does not create entries in the Multi-Processor Specification tables to
describe the virtual processors.
3.2.11 Intel SpeedStep
®
Technology
Intel
®
Xeon
®
processors support the Geyserville feature of the Intel SpeedStep
®
technology.
This feature changes the processor operating ratio and voltage similar to the Thermal Monitor 1
(TM1) feature. Geyersville must be used in conjunction with the TM1. The BIOS implements the
Geyserville feature in conjunction with the TM1 feature.
3.2.12 Intel
®
Extended Memory 64 Technology (Intel
®
EM64T)
The system BIOS does the following:
Detects whether the processor is Intel
®
Extended Memory 64 Technology (Intel
®
EM64T)
capable
Initializes the SMBASE for each processor
Detects the appropriate SMRAM State Save Map used by the processor
Enables Intel
®
EM64T during memory initialization if necessary
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