• The HP zx1 Chipset I/O adapter chip is a scalable solution designed to support PCI-X, PCI, and AGP bus
architectures. It provides a scalable I/O implementation for a wide variety of systems. The Integrity rx1600,
rx2600, rx4640, and rx5670 servers do not deploy AGP graphics bus technology. AGP is available in the
HP zx2000 and zx6000 Workstations, which also employ the HP zx1 Chipset.
• The HP zx1 Chipset scalable memory expander is an optional component used to increase memory capacity
and increase memory bandwidth. Acting as a memory hub, it decreases the number of signal loads on the
memory bus, thereby allowing the system to increase its memory transfer rate. Memory expanders are not used
in the Integrity rx1600 or rx2600 server. The Integrity rx4640 server, however, deploys 6 memory expanders,
resulting in large memory capacity (up to 64 GB over 32 DIMM slots) and bandwidth (12.8 GB/s). Likewise,
the Integrity rx5670 server uses 12 memory expanders on two memory carriers to provide an exceptional
memory capacity of 96 GB (over 48 DIMMs) with 12.8 GB/s bandwidth.
Figure 9. The three components of the HP zx1 Chipset
zx1
MIO
• HP zx1 Chipset memory and I/O controlle
– Connects to processor bus
Contains memory controlle
–
– Contains I/O cache controlle
• HP zx1 Chipset I/O adapte
—a single
zx1
IO
I/O adapter that supports:
– PCI
PCI-
–
–
GP
zx1
SME
• HP zx1 Chipset scalable memory
expande
—an optional component used to:
Increase memory capacit
Increase memory bandwidth–
–
The HP zx1 Chipset was designed with several goals in mind:
• Provide the best performance—For demanding applications that don’t fit within the processor cache, the
memory system design is the key to performance. The HP zx1 Chipset’s memory bandwidth has been optimized
with dual memory controllers to provide from 8.5 to 12.6 GB/s of memory bandwidth with 80 to 105
nanoseconds of open page latency.
• Provide the right functionality—Use systems that include both memory capability and PCI-X support.
– At 16 GB, 24 GB, 64 GB, and 96 GB, respectively, the Integrity rx1600, rx2600, rx4640, and rx5670
servers provide enough memory capacity for the most demanding tasks.
– The Integrity rx1600, rx2600, rx4640, and rx5670 servers support 133 MHz PCI-X buses capable of
handling the latest generation of high-speed I/O adapters.
• Enable a family of systems via a modular, multi-chip design—Designers can choose the chipset components
they need and select the number of these components to meet system cost and design requirements. For
example, the more expandable Integrity rx4640 and rx5670 servers deploy HP zx1 Chipset scalable memory
expanders for greater memory capacity. The Integrity rx1600 and rx2600 servers, on the other hand, do not
deploy zx1 Chipset scalable memory expanders, resulting in lower system costs.
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