Specifications

E PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz
91
Table 35. OverDrive

VRM Power Dissipation for Thermal Design
Parameter Typ
1
Max
1
Unit Notes
OverDrive VRM Power
Dissipation
6.0
6.5
7.0
7.0
7.8
8.7
W
W
W
2
3
4
T
C
, Max 105 °C Voltage Regulator Maximum Case
Temperature
NOTES:
1. Specification for the OverDrive
®
Voltage Regulator Module. A Pentium
®
Pro processor OEM Module is specific to the
design and may differ.
2. This specification applies to the future OverDrive
®
VRM for 150 MHz Pentium
®
Pro processor-based systems.
3. This specification applies to the future OverDrive VRM for 166 and 180 MHz Pentium Pro processor-based systems.
4. This specification applies to the future OverDrive VRM for 200 MHz Pentium Pro processor-based systems.
Table 36. Thermal Resistance and Maximum Ambient Temperature
Airflow - Ft./Min (M/Sec)
1
100
(0.50)
150
(0.75)
200
(1.01)
250
(1.26)
300
(1.52)
OverDrive
®
processor T
A
, Max
(°C)
Fan/Heatsink requires Ambient of 50°C or less
regardless of external airflow.
OverDrive VRM Θ
CA
(°C/W) 9.8 8.3 6.8 6.4 6.0
OverDrive VRM T
A
, Max (°C)
2,3
46 55 64 67 69
OverDrive VRM T
A
, Max (°C)
2,4
41 51 61 63 66
OverDrive VRM T
A
, Max (°C)
2,5
36 47 57 60 63
NOTES:
1. Airflow direction parallel to long axis of VRM PCB.
2. T
CASE
= 105°C, Power as per Table 35.
3. This specification applies to the future OverDrive
®
VRM for 150 MHz Pentium
®
Pro processor-based systems.
4. This specification applies to the future OverDrive VRM for 166 and 180 MHz Pentium Pro processor-based systems.
5. This specification applies to the future OverDrive VRM for 200 MHz Pentium Pro processor-based systems.
8.6. Criteria for OverDrive
®
Processor
This section provides PC system designers with
information on the engineering criteria required to
ensure that a system is upgradable. The diagrams
and checklists will aid the OEM to check specific
criteria. Several design tools are available through
Intel field representatives which will help the OEM
meet the criteria. Refer to Section 8.6.1 for a list of
documents.
The criteria are divided into 5 different categories:
• Electrical Criteria
• Thermal Criteria
• Mechanical Criteria
• Functional Criteria
• End User Criteria