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

Legacy Fan Speed Control
114 Thermal and Mechanical Design Guidelines
Figure 7-42. Temperature Range = 10 °C
0
500
1000
1500
2000
2500
3000
3500
Time (s)
RPM
40
45
50
55
60
65
70
75
80
Tdiode (C)
Fan RPM Tdiode Tcontrol Tlow
It should be noted that having T
SENSOR
above T
CONTROL
is expected for workloads near
TDP power levels and high system ambient. See Section
E.4 for additional discussion
on T
CONTROL
versus Thermal Profile
For use with the ATX Boxed Processor enabled reference solution a T
RANGE
value of
10 °C is recommended. For BTX Boxed Processor enabled reference solutions, T
RANGE
value of 7 °C is recommended.
E.2.1.2 Minimum PWM Duty Cycle
The final step in determining the FSC setting is to determine the minimum PWM Duty
cycle. This is the fan speed for any T
SENSOR
< T
LOW
. The selection of this value is
dependent on
• Acoustic target at system idle
• Voltage regulator cooling
For a motherboard design intending to use the Boxed Processor or the enabled
reference thermal solution the recommended minimum PWM duty cycle is 20%.
Note: Set minimum PWM Duty Cycle only as low as required to meet acoustic requirements.
The FSC design needs to accommodate transition from a low power state to TDP
workloads without having PROCHOT# becoming active.

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

General

Brand	Intel
Model	E2180 - Pentium Dual-Core 2.00GHz 800MHz 1MB Socket 775 CPU
Category	Computer Hardware
Language	English