Intel E2180 - Pentium Dual-Core 2.00GHz 800MHz 1MB Socket 775 CPU User Manual

ATX Thermal/Mechanical Design Information
Thermal and Mechanical Design Guidelines 59
6.2.2 Acoustics
To optimize acoustic emission by the fan heatsink assembly, the reference design
implements a variable speed fan. A variable speed fan allows higher thermal
performance at higher fan inlet temperatures (T
A
) and lower thermal performance with
improved acoustics at lower fan inlet temperatures. The required fan speed necessary
to meet thermal specifications can be controlled by the fan inlet temperature and
should comply with requirements listed in the following table.
Table
6-3. Acoustic Results for ATX Reference Heatsink (D60188-001)
Fan
Speed
RPM
Thermistor
Set Point
Acoustic Thermal Requirements, Ψca Notes
2900 High
T
A
= 40 °C
4.5 BA 0.31 °C/W (Core
™
2 Duo 4MB at Tc-max of 60.1 °C)
0.33 °C/W (Core
™
2 Duo 2MB at Tc-max of 61.4 °C)
0.33 °C/W (E2000 series at Tc-max of 61.4 °C )
1800 Low
T
A
= 30 °C
3.5 BA 0.46 °C/W (Core
™
2 Duo 4MB at Tc-max of 60.1 °C)
0.48 °C/W (Core
™
2 Duo 2MB at Tc-max of 61.4 °C)
0.48 °C/W (E2000 series at Tc-max of 61.4 °C)
Thermal
Design
Power, Fan
speed
limited by
the fan hub
thermistor
1000 Low
T
A
= 28 °C
Minimum
fan speed
Table 6-4. Acoustic Results for ATX Reference Heatsink (E18764-001)
Fan
Speed
RPM
Thermistor
Set Point
Acoustic Thermal Requirements, Ψca Notes
3900 High
T
A
= 40 °C
5.0 BA • 0.49 °C/W (Intel Core
™
2 Duo processor, 4 MB /
2 MB at Tc-max of 72.0 °C)
• 0.51 °C/W (Intel Core
™
2 Duo processor, 2 MB at
Tc-max of 73.3 °C)
• 0.51 °C/W (E2000 series at Tc-max of 73.3 °C )
• 0.51 °C/W (E1000 Series of Tc-max of 73.3 °C )
2000 Low
T
A
= 30 °C
3.5 BA • 0.65 °C/W (Intel Core
™
2 Duo processor, 4 MB /
2 MB at Tc-max of 72.0 °C)
• 0.67 °C/W (Intel Core
™
2 Duo processor, 2 MB at
Tc-max of 73.3 °C)
• 0.67 °C/W (E2000 series at Tc-max of 73.3 °C)
• 0.67 °C/W (E1000 Series of Tc-max of 73.3 °C)
Thermal
Design
Power, Fan
speed
limited by
the fan hub
thermistor
NOTES:
1. Acoustic performance is defined in terms of measured sound power (LwA) as defined in
ISO 9296 standard, and measured according to ISO 7779.
While the fan hub thermistor helps optimize acoustics at high processor workloads by
adapting the maximum fan speed to support the processor thermal profile, additional
acoustic improvements can be achieved at lower processor workload by using the

Intel E2180 - Pentium Dual-Core 2.00GHz 800MHz 1MB Socket 775 CPU Specifications

General

Clock Speed	2.00GHz
FSB Speed	800MHz
L2 Cache	1MB
Socket	LGA 775
Number of Cores	2
TDP	65W
Manufacturing Technology	65nm
Number of Threads	2
Virtualization Technology	No
Integrated Graphics	No
Processor Model	Intel Pentium Dual-Core E2180