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313079-001 Datasheet(PDF) 99 Page - Intel Corporation |
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313079-001 Datasheet(HTML) 99 Page - Intel Corporation |
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99 / 104 page  Dual-Core Intel® Xeon® Processor 5000 Series Datasheet 99 Boxed Processor Specifications 8.2.2 Boxed Processor Heat Sink Weight 8.2.2.1 Thermal Solution Weight The 1U passive/2U active combination heat sink solution and the 2U passive heat sink solution will not exceed a mass of 1050 grams. Note that this is per processor, so a dual processor system will have up to 2100 grams total mass in the heat sinks. This large mass will require a minimum chassis stiffness to be met in order to withstand force during shock and vibration. See Section 3 for details on the processor weight. 8.2.3 Boxed Processor Retention Mechanism and Heat Sink Support (CEK) Baseboards and chassis designed for use by a system integrator should include holes that are in proper alignment with each other to support the boxed processor. Refer to the Server System Infrastructure Specification (SSI-EEB 3.6, TEB 2.1 or CEB 1.1). These specification can be found at: http://www.ssiforum.org. Figure 8-3 illustrates the Common Enabling Kit (CEK) retention solution. The CEK is designed to extend air-cooling capability through the use of larger heat sinks with minimal airflow blockage and bypass. CEK retention mechanisms can allow the use of much heavier heat sink masses compared to legacy limits by using a load path directly attached to the chassis pan. The CEK spring on the secondary side of the baseboard provides the necessary compressive load for the thermal interface material. The baseboard is intended to be isolated such that the dynamic loads from the heat sink are transferred to the chassis pan via the stiff screws and standoffs. The retention scheme reduces the risk of package pullout and solder joint failures. All components of the CEK heat sink solution will be captive to the heat sink and will only require a Phillips screwdriver to attach to the chassis pan. When installing the CEK, the CEK screws should be tightened until they will no longer turn easily. This should represent approximately 8 inch-pounds of torque. Avoid applying more than 10 inch-pounds of torque; otherwise, damage may occur to retention mechanism components. 8.3 Electrical Requirements 8.3.1 Fan Power Supply (Active CEK) The 4-pin PWM/T-diode controlled active thermal solution is being offered to help provide better control over pedestal chassis acoustics. This is achieved though more accurate measurement of processor die temperature through the processor’s temperature diode (T-diode). Fan RPM is modulated through the use of an ASIC located on the baseboard that sends out a PWM control signal to the 4th pin of the connector labeled as Control. This thermal solution requires a constant +12 V supplied to pin 2 of the active thermal solution and does not support variable voltage control or 3-pin PWM control. See Table 8-2 for details on the 4-pin active heat sink solution connectors. If the 4-pin active fan heat sink solution is connected to an older 3-pin baseboard CPU fan header it will default back to a thermistor controlled mode, allowing compatibility with legacy 3-wire designs. When operating in thermistor controlled mode, fan RPM is automatically varied based on the TINLET temperature measured by a thermistor located at the fan inlet of the heat sink solution. |
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