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HP N4000 (rp7405/rp7410)

Quick Facts
Introduced 2002
CPU 2-8 PA-8700/
2-8 PA-8800/
2-8 PA-8900
650-1100 MHz
Caches 2.25-3 MB L1
0-64 MB L2
RAM 64 GB
Design Cell
Drives 5 SCSI
Expansion 16 PCI
Bandwidth CPU 8-16 GB/s
XBAR 8 GB/s
Mem 4-8 GB/s
XBAR-I/O 4 GB/s
I/O 8.4 GB/s
I/O SCSI
1/3 serial
GigE
100E console

Overview

The rp7405/rp7410 N4000 servers are up to 8-way multiprocessing servers and the smallest HP systems which can be partitioned into logical servers (two nPartitions). Based upon the same 10U rack-mountable chassis as their rp7400/N4000 brethren, the newer rp7405 and rp7410 are built around a completely overhauled system and I/O architecture. The Core Electronic Complex is a modified version of the Superdome’s cell-based system architecture, limited to two cells, which each contain up to four processors, sixteen memory slots and the central chipset — the cell controller (CC). These newer N4000s feature a very large amount of system and I/O bandwidth: 16 GB/s CPU, 8 GB/s memory, 8 GB/s cell-to-cell and 8.5 GB/s I/O bandwidth (all maximum aggregate values).

The rp7405 was apparently an entry-level version of the rp7410 — based on the same hardware and with the same capabilities but shipped in smaller configurations. Upgrades to a full rp7410 were later possible, probably including a modified firmware for unlocking the full functionality.

Internals

CPU

The rp7405 and rp7410 support from two to eight processors.

They are based on different system boards with different model numbers — the same basic architecture but with differences relating to the type and number of processors.

Processor types are indicated with the following suffixes:

There are two CPU/memory cell boards, with each four processor sockets.

Chipset

The Cell system architecture has three main components:

Other parts of the chipset:

» View a system-level illustration (ASCII) of the rp7405/rp7410 system/bus architecture.

Buses

Memory

Expansion

There are in all 16 PCI 64-bit/66 MHz slots in the I/O cage, which can be fully accessed when using a system with two cells — with one cell board only seven slots are available. One PCI slot is dedicated to the Core I/O card set (see above) so only 15 of the 16 PCI slots are available for expansion options.

Drives

The two pairs of SCSI drives are each connected to a separate channel on one of the SCSI controllers of the Core I/O sets — for both pair of drives to work two Core I/O card sets are needed.

External connectors

References

Manuals

Operating systems

Benchmarks

Model SPEC2000, int SPEC2000, fp SPEC2000
rate, int
SPEC2000
rate, fp
N4000-7X
rp7410
4-CPU: 25.3
8-CPU:49.9
4-CPU: 18.9
8-CPU:36.8

Compare these with other results on the Benchmarks page.

Physical dimensions

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