User Manual

Intel
®
Xeon
®
Processor 5600 Series Datasheet Volume 1 183
Boxed Processor Specifications
solution and does not support variable voltage control or 3-pin PWM control. See
Figure 9-14 and Table 9-1 through Table 9-3 for details on the 4-pin active heat sink
solution connectors.
The fan power header on the baseboard must be positioned to allow the fan heat sink
power cable to reach it. The fan power header identification and location must be
documented in the suppliers platform documentation, or on the baseboard itself. The
baseboard fan power header should be positioned within 177.8 mm [7 in.] from the
center of the processor socket.
9.3.1 Boxed Processor Cooling Requirements
As previously stated the boxed processor will have three cooling solutions available.
Each configuration will require unique design considerations. Meeting the processor’s
temperature specifications is also the function of the thermal design of the entire
system, and ultimately the responsibility of the system integrator. The processor
temperature specifications are found in Section 7 of this document.
Table 9-1. PWM Fan Frequency Specifications For 4-Pin Active Thermal Solution
Description Min Frequency Nominal Frequency Max Frequency Unit
PWM Control
Frequency Range
21,000 25,000 28,000 Hz
Table 9-2. Fan Specifications For 4-Pin Active Thermal Solution
Description Min
Typ
Steady
Max
Steady
Max
Startup
Unit
+12 V: 12 volt fan power supply 10.8 12 12 13.2 V
IC: Fan Current Draw N/A 1.25 1.5 2.2 A
SENSE: SENSE frequency 2 2 2 2
Pulses per fan
revolution
Figure 9-14. Fan Cable Connector Pin Out For 4-Pin Active Thermal Solution
Table 9-3. Fan Cable Connector Pin Out for 4-Pin Active Thermal Solution
Pin Number Signal Color
1Ground Black
2 Power: (+12 V) Yellow
3 Sense: 2 pulses per revolution Green
4 Control: 21 kHz-28 kHz Blue