Product guide

Chapter 1: System Description QSSC-S4R Server System Product Guide
Version 1.0
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Processors
One to four Intel® Xeon® Processor 7500 series are supported. When a single processor is installed, it must be
installed into CPU Socket 1.
System Memory
The memory risers connect to the main board through 8 PCI Express (PCIe) connectors. One to eight memory
risers can be installed via PCIe x24 card edge connectors. Memory air baffles are needed to restrict airflow to
empty memory riser slots. Key features of the memory risers are discussed in “Memory Riser” on page 23.
QSSC-S4R supports only DDR3 registered DIMMs. Based on the Intel® 7500 Chipset, the system will provide
one set of RAS questions in BIOS Setup and will configure common RAS across Sockets. QSSC-S4R supports
the following memory RAS (Reliability, Availability and Serviceability) features:
 Lock Step mode
 Interleaving

Mirroring Mode

Sparing Mode
 Hemisphere Mode
For detailed description of each RAS mode and configuration examples, refer to the QSSC-S4R Technical
Product Specification.
Figure 6. Memory Riser Locations and Numeration
Power Subsystem
The power subsystem consists of:
 Power supply modules (PSU)
 A power distribution board (PDB)
The power supply subsystem can support up to 4 PSU which all connect to the PDB.
The total system is rated 100-127/200-240V AC, 50/60 Hz, 28/14A. The minimum system configuration requires
installation of at least two PSU’s. The PSU is considered hot-swappable. The system can be configured to
support *True AC redundancy or non-AC redundancy.
Note: *True AC redundancy is recommended for systems used for critical business applications. This
will result in the system to continue operation during a power failure as the redundant part of the
subsystem is plugged into a separate AC source [e.g. Un-interruptable Power Supply (UPS)).
Note: Refer to Tables below for maximum DC loading for both AC redundant and AC non redundant
configurations.