Characterizing Cooling Solution Performance Requirements; Fan Speed Control; Intel Reference Heatsink Performance Targets For Quad-Core Intel® Xeon® Processor L5300 Series - Intel X5365 - Xeon 3.0 GHz 8M L2 Cache 1333MHz FSB LGA771 Quad-Core Processor Design Manual

Thermal/Mechanical Reference Design
Table 2-6. Intel Reference Heatsink Performance Targets for Quad-Core Intel® Xeon®
Processor L5300 Series
Parameter
Altitude
T
CASE_MAX
T
CASE_MAX
Pressure Drop
Note: In case of conflict, the processor Datasheet supersedes the information contained in the TMDG
2.3 Characterizing Cooling Solution Performance
Requirements
2.3.1

Fan Speed Control

Fan speed control (FSC) techniques to reduce system level acoustic noise are a
common practice in server designs. The fan speed is one of the parameters that
determine the amount of airflow provided to the thermal solution. Additionally, airflow
is proportional to a thermal solution's performance, which consequently determines the
T of the processor at a given power level. Since the T
CASE
important parameter in the long-term reliability of a processor, the FSC implemented in
a system directly correlates to the processor's ability to meet the Thermal Profile and
hence the long-term reliability requirements. For this purpose, the parameter called
T
CONTROL
long-term reliability of the processor is met while keeping the system level acoustic
noise down.
methodology.
Quad-Core Intel® Xeon® Processor 5300 Series Thermal/Mechanical Design Guidelines (TMDG)
Maximum
Sea-Level
T
40
LA
TDP
50
60
@ P_profile_min 50
15
Airflow
25.5
0.331
82.4
0.249
ψ
CA
as explained in Section
Figure 2-14 depicts the relationship between T
Unit
m
°C
W
1U Reference Solution
°C
°C
CFM
3
m / hr
Inches of H O
2
Pa
°C/W
2.2.6, is to be used in FSC designs to ensure that the
Notes
Heatsink designed at 0 meters
P_profile_min = 22.2W.
Airflow through the heatsink fins
Mean + 3σ
of a processor is an
CASE
and FSC
CONTROL
33