Intel EM64T - Celeron D 336 Boxed Ena User Manual

Acoustic Fan Speed Control
R
58 Thermal/Mechanical Design Guide
Figure 20. 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
DIODE
above T
CONTROL
is expected for near TDP power levels and
high system ambient. See Section
6.5 for additional discussion on T
CONTROL
versus Thermal
Profile.
For use with the Intel
®
Boxed Pentium 4 Processor in 775–Land LGA Package on the enabled
reference solution, a T
RANGE
value of 10 °C is recommended for ATX chassis.
6.3.1.2 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
DIODE
< 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 Intel Boxed Pentium 4 Processor in 775–land LGA
Package or the enabled reference thermal solution the recommended minimum PWM duty cycle
is 30%.

Intel EM64T - Celeron D 336 Boxed Ena Specifications

General

Brand	Intel
Model	EM64T - Celeron D 336 Boxed Ena
Category	Computer Hardware
Language	English