Architectural overview of the HP Integrity rx5670 server
The HP Integrity rx5670 server supports one, two, three, or four Intel Itanium 2 processors linked to the zx1 Chipset
memory and I/O controller through a 200 MHz, double-pumped 128-bit system bus. Total bandwidth on the system
bus is 6.4 GB/s.
Figure 13. The HP Integrity rx5670 server supports up to four Intel Itanium 2 processors linked to the HP zx1 Chipset
The zx1 Chipset memory controller links to two independent 200 MHz, 6.4 GB/s memory buses. Each bus
connects to six zx1 Chipset scalable memory expanders, which in turn allocate bandwidth to the DDR DRAM
memory DIMMs. Total DIMM capacity is 48 units, distributed over two 24 DIMM memory carrier boards, with
one board on each memory bus.
The server can operate with only one memory carrier board; however, this will only use one memory bus and,
therefore, only half of the available memory bandwidth. For maximum performance, the Integrity rx5670 server
should be configured with both memory carrier boards, allowing full utilization of the server’s 12.8 GB/s total
memory bandwidth.
The I/O architecture consists of eight 0.5 GB/s channels allocated among eight zx1 Chipset I/O adapters. Each
of these eight adapters provides a PCI-X or PCI bus to the available I/O slots and core I/O devices. The first three
I/O channels connect to three independent 133 MHz PCI-X I/O slots, each with 0.5 GB/s of sustained
throughput. The next three I/O channels connect to three zx1 Chipset I/O adapters, each of which in turn
connects to a pair of 66 MHz PCI-X I/O slots. Each slot-pair shares 0.5 GB/s of bandwidth.
The final two I/O channels connect to the core I/O. One channel provides 0.5 GB/s of bandwidth to the core
10/100/1000BT LAN as well as to one dual-channel Ultra160 SCSI controller. The other channel provides
0.5 GB/s of bandwidth to the core management LAN, RS-232 serial ports, another dual-channel Ultra160 SCSI
controller, and a 33 MHz PCI slot. The 33 MHz slot is ideal for the optional VGA/USB adapter (HP product
number A6869A). The VGA/USB card is automatically placed in this slot on systems that are factory-loaded
with Microsoft Windows operating systems.
Extensible firmware interface
The extensible firmware interface (EFI) is an interface between the HP-UX, Linux, and Windows operating systems
and the Itanium 2–based platform firmware. The file system supported by the extensible firmware interface is
based on the file allocation table (FAT) file system. EFI allows the use of FAT-32 for the system partition. (The
system partition is required on a bootable disk for the Itanium 2–based platform.)
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