Intel X5460 AT80574KJ087N Data Sheet

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Intel supports and validates dual processor configurations only in which both 
processors operate with the same FSB frequency, core frequency, power segments, and 
have the same internal cache sizes. Mixing components operating at different internal 
clock frequencies is not supported and will not be validated by Intel. Combining 
processors from different power segments is also not supported.

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 (See 

). 

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.

 specifies absolute maximum and minimum ratings only, which lie outside 

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.