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313079-001 Datasheet(PDF) 24 Page - Intel Corporation |
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313079-001 Datasheet(HTML) 24 Page - Intel Corporation |
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24 / 104 page  Electrical Specifications 24 Dual-Core Intel® Xeon® Processor 5000 Series Datasheet connect to the rest of the chain unless one of the other components is capable of accepting an input of the appropriate voltage. Similar considerations must be made for TCK, TMS, and TRST#. Two copies of each signal may be required with each driving a different voltage level. 2.10 Mixing Processors Intel supports and validates dual processor configurations only in which both processors operate with the same FSB frequency, core frequency, 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 [Note: Processors within a system must operate at the same frequency per bits [15:8] of the IA32_FLEX_BRVID_SEL MSR; however this does not apply to frequency transitions initiated due to thermal events, Enhanced HALT, Enhanced Intel SpeedStep® Technology transitions, or assertion of the FORCEPR# signal (See Chapter 6, “Thermal Specifications”)]. Low voltage (LV), mid-voltage (MV) and full-power 64-bit Intel Xeon processors should not be mixed within a system. Not all operating systems can support dual processors with mixed frequencies. Intel does not support or validate operation of processors with different cache sizes. 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. 2.11 Absolute Maximum and Minimum Ratings Table 2-9 specifies absolute maximum and minimum ratings. Within functional operation limits, functionality and long-term reliability can 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 2-9. Processor Absolute Maximum Ratings Symbol Parameter Min Max Unit Notes1, 2 VCC Core voltage with respect to VSS -0.30 1.55 V VTT FSB termination voltage with respect to VSS -0.30 1.55 V TCASE Processor case temperature See Section 6 See Section 6 ° C TSTORAGE Storage temperature -40 85 ° C3, 4, 5 |
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