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SRPL8 Server System Product Guide 23
Table 4. Boardset Features (continued)
Feature Description
Memory modules Two dual plug-in modules containing interleaved pathway to main memory supporting
PC100 registererd SDRAM. Each memory module supports from 128 MB to 16 GB of
error correction code (ECC) memory using sixteen 72-bit dual inline memory modules
(DIMMs). The modules interface to the profusion carrier through the midplane.
FSB terminator
module
This module plugs into any unpopulated Slot 2 connector on either processor
mezzanine board. The module terminates the FSB GTL+ signals of the
Slot 2 connector when a processor S.E.C. cartridge is not installed in a connector.
Cache coherency
filters
The cache coherency filters contain information on each of the two processor buses,
thus enabling each bus to perform with minimal snoop cycles. The profusion carrier
requires that these filters be populated if the server has two processor mezzanine
boards that are both populated with processors.
PHP I/O carrier Ten hot-pluggable 64-bit PCI expansion slots (six 33 MHz PCI, four 100 MHz PCI-X).
Integrated ATI Rage XL graphics (SVGA) controller with 8 MB of video memory.
The QLogic 12160 Ultra 160 LVDS SCSI controller supports two LVDS channels.
One channel is used internally to provide support for the internal SCSI drives
(connected to the LVDS hot-swap disk backplane) and CD-ROM or tape drive. The
second LVDS channel is routed to the rear of the chassis to support external devices.
The diskette controller supports one drive.
The PCI-enhanced Integrated Drive Electronics (IDE) interface supports one IDE bus.
PS/2-compatible keyboard/mouse controller.
Two universal serial bus (USB) ports.
I/O riser board This board contains all legacy I/O connections; it plugs into an edge connector on the
PHP I/O carrier.
PS/2-compatible keyboard and mouse ports (interchangeable).
PS/2-compatible parallel port.
Analog VGA, 15-pin video port.
Two PS/2-compatible, 9-pin serial ports.
LVDS hot-swap
disk backplane
This backplane supports hot-swapping of up to two SCA2-type SCSI drives, mounted
in carriers, in and out of the hot-swapping bays.
Front panel board The front panel board provides the user interface to the server. The board allows
other servers to communicate with this server, even while power is down, via an
Interchassis Management Bus (ICMB).
Push-button switches control power-up, reset, and nonmaskable interrupt
(NMI) functions.
LEDs indicate power on, power supply failure, hard drive failure, or a fan or other
server cooling failure.
An LCD panel provides information about boot status, available number of
processors, and other server management information.
Midplane The midplane:
• Electrically connects the PHP I/O and profusion carriers
• Contains the sockets for the memory modules
• Distributes DC power to the PHP I/O and profusion carrier, disk backplane, cooling
fans, memory boards, and front panel board
• Distributes the power load of the server among two or three 750-watt autoranging
power supplies