New System Features D-3
Performance on Kx70/Kx80 is optimized when at least 8 memory banks (8 SIMMs, or four modules) are
used . Each module provides two banks of memory, except for the 64MB modules, which are actually 1/2-
populated 128MB modules. (Note the example on page C-7, which shows configured memory with only 7
banks: two banks for each of the modules except the 64MB module, which has only 1 bank. Memory will
not be optimized unless the 64MB module is replaced with a different-sized module, or additional memory
is added.)
LASI Lan on HP9000/Kx80 Servers
The existing configuration rule documented on page 2-30 of the HP9000 Enterprise Configura-
tion Guide (May 1997) for LASI LAN states:
“Note: Some system configurations can compete for I/O bus usage with the built-in 802.3 LAN
interface on the standard multifunction I/O (Core I/O). The result is a slow down in LAN perfor-
mance due to an increase in CRC errors (LAN retries). Thus, it is recommended that customers
use an add-in 802.3 LAN card as the primary LAN interface when using four or more PA8200
processors with less than 1.5GB of memory or when using the VISUALIZE 2-D graphics card in
the optional HP-HSC I/O slot on the multifunction I/O.”
For HP9000/Kx80 systems, the following additions and changes apply:
A minimum of 1.5GB of main memory must be configured such that there are eight (8) banks or
greater in at least one (1) memory interleave group. Memory module sizes should be limited to
32MB (64MB pair) DIMMS or larger. For best performance, it is recommended that memory is
configured over 2 memory carriers.
If a 100BT I/O card (NIO or GSC) is installed then DO NOT USE LASI LAN.
External HP-PB I/O Card Configuration
Figure D-1 shows the card slots and slot numbering scheme at the back of the HP-PB card cage. The HP-
PB I/O card guidelines listed in Table D-1. are provided to optimize system performance for HP 9000
systems. Table D-2. contains optimization guidelines for HP 3000 systems.
Configuring the HP-PB I/O Card Cage for 9x9KS/K-Class System Performance
Although the workload of each configuration will be different depending on such factors as the type of
application, number of users, etc., there are a few general guidelines for I/O card configurations. These
guidelines can be used as a starting point for constructing a reasonable configuration, but your configuration
may require more stringent limits or less demanding limits depending on the specific workload
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