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OCPRF100 MP Server System Technical Product Specification
Revision 1.0
27
3.3 Internal Chassis Features
3.3.1 Power System
Three 750-W supplies in a standard configuration provide the modular power system for the sys-
tem.
The power system may be configured with three power supplies (2+1) for power redun-
dancy, or with two supplies in a nonredundant configuration.
The power supplies are mounted in
a row at the rear bottom of the chassis.
A single AC power cord provides power to the daisy-
chained supplies.
When the server is configured with three power supplies, the user can hot swap a failed supply
without affecting system functionality.
The midplane provides power distribution of the internal power system with minimal active cir-
cuitry.
The power distribution circuitry reports quantity and location of the installed power supplies
through I
2
C* server management.
Two 750-W, 208-Vac supplies are capable of handling power requirements for the OPRF100
board set and peripherals.
For the OPRF100 board set, this includes eight Pentium III Xeon pro-
cessors, 32 GB of memory and two 1.6-inch hard drives.
The Profusion carrier provides headers for two processor mezzanine boards, each providing four
slots for Pentium III Xeon processors. Each mezzanine board has six integrated VRM 8.3 com-
patible voltage converters. The converter input is +12 Vdc from the power supply. Each Pentium
III Xeon processor core has its own converter. One converter provides power for a pair of Pen-
tium III Xeon processor L2 caches.
The total power requirement for the OPRF100 board set exceeds the 240 VA energy hazard limit
that defines an operator accessible area. As a result, only qualified technical individuals should
access the processor, memory, and non-hot-plug I/O carrier areas while the system is energized.
Refer to Chapter Power Supply Power Supply of this document for detailed power specifications.
Table 3-6: System Power Budget – Current (A) and Power (W)
OCPRF100 MP Server
System Power Budget
Units +3.3 V +5 V +12 V -12 V +5
VSB
Power
Board Spec Units +3.3 V +5 V +12 V -12 V +5
VSB
Power
I/O Carrier Min. Load Adc 0.20 0.70 0.00 0.20 0.65 9.81
Max. Load Adc 7.99 45.20 5.00 1.20 0.75 330.52
Max. Step Load Adc 2.00 12.17 4.50 0.25 0.10