Compaq 21264 Hardware Reference Manual page 252

Operating Temperature
Table 10–2 lists the values for the center of heat-sink-to-ambient (
EV67 587-pin PGA. Tables 10–3 through 10–8 show the allowable T
exceeding T
Table 10–2 a at Various Airflows for 21264/EV67
c
Airflow (linear ft/min)
a
with heat sink type 1 ( C/W)
c
a
with heat sink type 2 ( C/W)
c
1
a
with heat sink type 3
c
1
Heat sink type 3 has a 80 mm 80 mm
Table 10–3 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 10–4 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 10–5 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 10–6 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
Thermal Management
10–2
) at various airflows.
c
( C/W)
15 mm fan attached.
for 21264/EV67 @ 600 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
for 21264/EV67 @ 667 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
for 21264/EV67 @ 700 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
for 21264/EV67 @ 733 MHz and @ 2.0 V with Various Airflows
a
1
( C)
15 mm fan attached.
100 200 400
2.0 1.2 0.65
1.4 0.78 0.45
— 0.38 —
100 200 400
— — 37.3
— 28.7 50.5
— 55.1 —
100 200 400
— — 30.7
— 21.2 45.3
— 50.4 —
100 200 400
— — 26.9
— — 42.2
— 47.6 —
100 200 400
— — 24.0
— — 40.0
— 45.6 —
Alpha 21264/EV67 Hardware Reference Manual
a) for the 21264/
c
(without
a
800 1000
0.40 0.37
0.33 0.31
800 1000
53.8 55.8
58.4 59.7
800 1000
48.9 51.1
54.0 55.5
800 1000
46.1 48.4
51.5 53.0
800 1000
44.0 46.4
49.6 51.2