Intel E5310 Data Sheet - Page 26

Electrical Specifications 2.11 Note: Mixing Processors Intel supports and validates dual processor configurations only in which both processors operate with the same FSB frequency, core frequency, number of cores, 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. 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 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. . Table 2-11. Processor Absolute Maximum Ratings Symbol Parameter Min Max Unit Notes1, 2 VCC VTT TCASE Core voltage with respect to VSS -0.30 1.55 V FSB termination voltage with respect to VSS -0.30 1.55 V Processor case temperature See See °C Section 6 Section 6 TSTORAGE Storage temperature -40 85 °C 3, 4, 5 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 Section 3. Excessive overshoot or undershoot on any signal will likely result in permanent damage to the processor. 26 Quad-Core Intel® Xeon® Processor 5300 Series Datasheet