Datasheet
56 Datasheet
Pentium
®
III Processor for the PGA370 Socket at 500 MHz to 1.10 GHz
4.0 Thermal Specifications and Design Considerations
This chapter provides needed data for designing a thermal solution. However, for the correct
thermal measuring processes, refer to AP-905, Intel
®
Pentium
®
III Processor Thermal Design
Guidelines
(Document Number 245087). The Pentium III processor uses flip chip pin grid array
packaging technology and has a junction (T
junction
)orcase temperature (T
case
) specified.
4.1 Thermal Specifications
Table 30 provides the thermal design power dissipation and maximum temperatures for the
Pentium III processor for the PGA370 socket. Systems should design for the highest possible
processor power, even if a processor with a lower thermal dissipation is planned. A thermal
solution should be designed to ensure the junction temperature never exceeds these specifications.
NOTES:
1. These values are specified at nominal V
CC
CORE
for the processor pins.
Table 30. Intel
®
Pentium
®
III Processor Thermal Design Power for the FC-PGA Package
1
Processor
Processor
Core
Frequency
(MHz)
System
Bus
Frequency
(MHz)
Processor
Thermal
Design
Power
2,3
up to
CPUID
0686h
(W)
Processor
Thermal
Design
Power
2,3
CPUID
068Ah
(W)
Power
Density
5
for
CPUID
068Ah
(W/cm
2
)
Maximum
T
JUNCTION
10
(°C)
T
JUNCTION
Offset for
Latest
Stepping
4,6
(°C)
500E 500 100 13.2 N/A N/A 85 1.9
533EB 533 133 14.0 N/A N/A 85 2.0
550E 550 100 14.5 N/A N/A 85 2.1
600E 600 100 15.8 19.6 30.5 82 2.6
600EB 600 133 15.8 N/A N/A 82 2.3
650 650 100 17.0 N/A N/A 82 2.7
667 667 133 17.5 N/A N/A 82 2.8
700 700 100 18.3 21.9 34.1 80 2.9
733 733 133 19.1 22.8 35.5 80 3.0
750 750 100 19.5 23.2 36.1 80 3.0
800 800 100 20.8 24.5 38.2 80 3.2
800EB 800 133 20.8 24.5 38.2 80 3.2
850 850 100 22.5 25.7 40.0 80 3.4
866 866 133 22.9 26.1 40.7 80 3.4
900 900 100 23.2 26.7 41.6 77 3.5
933 933 133 24.5 27.5 42.8 77 3.6
1 GHz 1000 100 N/A 29.0 45.2 75
8
3.8
1B GHz 1000 133 26.1 29.0 45.2 70
9
75
8
3.8
1B GHz
7
1000 133 29.6 N/A N/A 70 3.9
1.10 GHz 1100 100 N/A 33.0 51.4 77 4.4