Compaq 21264 Hardware Reference Manual page 253

Table 10–7 Maximum T
Airflow (linear ft/min)
Maximum T with heat sink type 1 ( C)
a
Maximum T with heat sink type 2 ( C)
a
Maximum T with heat sink type 3
a
1
Heat sink type 3 has a 80 mm 80 mm
Table 10–8 Maximum T
Airflow (linear ft/min)
Maximum T with heat sink type 1 ( C)
a
Maximum T with heat sink type 2 ( C)
a
Maximum T with heat sink type 3
a
1
Heat sink type 3 has a 80 mm 80 mm
10.2 Heat Sink Specifications
Three heat sink types are specified. The mounting holes for all three are in line with the
cooling fins.
Figure 10–1 shows the heat sink type 1, along with its approximate dimensions.
Alpha 21264/EV67 Hardware Reference Manual
for 21264/EV67 @ 750 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
for 21264/EV67 @ 833 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
Heat Sink Specifications
100 200 400
— — 22.1
— — 38.5
— 44.3 —
100 200 400
— — —
— — 31.8
— 33.8 —
Thermal Management
800 1000
42.6 45.1
48.4 50.0
800 1000
36.3 39.1
42.7 44.5
10–3