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OCPRF100 MP Server System Technical Product Specification
Revision 1.0
30
ies the fan input voltage. At 28°C ambient temperature, the fan input voltage is 8.0 ± 0.5 Vdc, and
at 35°C, the fan input voltage is 13.5 Vdc.
3.3.2.3 Cooling Summary
The system fans are sized to provide cooling for up to eight Pentium III Xeon processors. The
power supply fans are sized to cool both fully populated SDRAM board sets, two hot-swap hard
drives, and for maintaining power supply function under a full load condition. The cooling system
is designed using a worst case analysis with no margin under a single fan failure (system or
power supply fan) condition. The environmental conditions are summarized in Section Specifica-
tions. Figure 3-8: OCPRF100 MP Server System Cooling summarizes the cooling provided to the
system components when system and power supply fans are operating with 12 Vdc input. The
lower fan speed settings were chosen to meet acoustic and thermal requirements.
Figure 3-8: OCPRF100 MP Server System Cooling
Profusion*
Carrier
I/O
Carrier
Midplane
64b PCI Add-in Card
750 W Power Supply
Hot-Swap Hard Drive
Backplane
750 W Power Supply
750 W Power Supply
Memory Module
(16 DIMMs)
Memory Carrier
(16 DIMMs)
System Fan System Fan System Fan
System Fan System Fan System Fan
PS Fan
PS Fan
PS Fan
70 CFM (12 Vdc Input)
70 CFM (12 Vdc Input)
150 CFM
(Maximum w/ all
power supply
fans functioning)
210 CFM (12
Vdc)
70 CFM (12 Vdc Input)
50 CFM (13.5 Vdc fan
input voltage)
50 CFM (13.5 Vdc fan
input voltage)
50 CFM (13.5 Vdc fan
input voltage)
12
CFM/
HDA
64b PCI Add-in Card
64b PCI Add-in Card
64b PCI Add-in Card
PB64
PB64
PB64
PB64
Pentium (R)
III Xeon (TM)
Pentium III
Xeon
Processor