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Note:
Processors within a system must operate at the same frequency per bits [12:8] of the
CLOCK_FLEX_MAX MSR; however this does not apply to frequency transitions initiated
due to thermal events, Extended HALT, Enhanced Intel SpeedStep® Technology
transitions, or assertion of the FORCEPR# signal.
Not all operating systems can support dual processors with mixed frequencies. Mixing
processors of different steppings but the same model (as per CPUID instruction) is
supported. Details regarding the CPUID instruction are provided in the AP-485 Intel®
Processor Identification and the CPUID Instruction application note.
2.12
Absolute Maximum and Minimum Ratings
Table 2-11
the functional limits of the processor. Only within specified operation limits, can
functionality and long-term reliability be expected.
At conditions outside functional operation condition limits, but within absolute
maximum and minimum ratings, neither functionality nor long-term reliability can be
expected. If a device is returned to conditions within functional operation limits after
having been subjected to conditions outside these limits, but within the absolute
maximum and minimum ratings, the device may be functional, but with its lifetime
degraded depending on exposure to conditions exceeding the functional operation
condition limits.
At conditions exceeding absolute maximum and minimum ratings, neither functionality
nor long-term reliability can be expected. Moreover, if a device is subjected to these
conditions for any length of time then, when returned to conditions within the
functional operating condition limits, it will either not function or its reliability will be
severely degraded.
Although the processor contains protective circuitry to resist damage from static
electric discharge, precautions should always be taken to avoid high static voltages or
electric fields.
.
Table 2-11. Processor Absolute Maximum Ratings
Symbol
V
CC
V
TT
T
CASE
T
STORAGE
Notes:
1.
For functional operation, all processor electrical, signal quality, mechanical and thermal specifications must
be satisfied.
2.
Overshoot and undershoot voltage guidelines for input, output, and I/O signals are outlined in
Excessive overshoot or undershoot on any signal will likely result in permanent damage to the processor.
3.
Storage temperature is applicable to storage conditions only. In this scenario, the processor must not
receive a clock, and no lands can be connected to a voltage bias. Storage within these limits will not affect
the long-term reliability of the device. For functional operation, please refer to the processor case
temperature specifications.
4.
This rating applies to the processor and does not include any tray or packaging.
5.
Failure to adhere to this specification can affect the long-term reliability of the processor.
28
specifies absolute maximum and minimum ratings only, which lie outside
Parameter
Core voltage with respect to V
FSB termination voltage with respect to
V
SS
Processor case temperature
Storage temperature
Min
-0.30
SS
-0.30
See
Section 6
-40
Quad-Core Intel® Xeon® Processor 5300 Series Datasheet
Electrical Specifications
Max
Unit
Notes
1.55
V
1.55
V
See
° C
Section 6
85
° C
3, 4, 5
Section
1, 2
3.
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