HP KAYAK XU800 User Manual

Removing, Replacing and Upgrading
Memory in HP Kayak XU800 Models

IMPORTANT NOTE This text was updated in December 2000 and replaces all earlier

information on memory replacement in the HP Kayak XU800.

Replacing SDRAM

SDRAM was available on some XU800 models shipped before May 2000.
Following an announcement made by the Intel Corporation that SDRAM
memory should not be used with the Intel 840 chipset (the chipset used in
the Kayak XU800) HP is replacing all SDRAM memory already shipped with
RDRAM (RAMBUS DRAM) memory.

To determine whether you have SDRAM or RDRAM memory installed,
remove the cover of the PC. SDRAM models of the HP Kayak XU800 carry a
SDRAM Memory Expansion Card as shown below.

To carry out the conversion, you should contact HP Support. You will then
be able to upgrade with RDRAM memory as described here.

RDRAM Memory Expansion Card

SDRAM Memory Expansion Card (must be replaced by RDRAM)

Replacing and Upgrading RDRAM Memory

There is a single Memory Expansion Card connector on the system board
for an RDRAM Memory Expansion Card.

NOTE Do not install a memory module directly into the connector for the

Memory Expansion Card on the system board.

The RDRAM Memory Expansion Card supports 2 or 4 RDRAM Memory
Modules.

Note the following constraints:

• RDRAM modules must be installed in pairs. The first two sockets A0 and

B0, closest to the system board, contain the first pair of modules.
Upgrades are then installed in sockets A1 and B1.

• Pairs must be of identical modules. For instance if A0 contains a 256MB

PC800 ECC RDRAM then B0 must contain a 256MB PC800 ECC
RDRAM. For this reason, all HP memory accessories for the XM800
contain 2 identical modules.

• If sockets A1 and B1 are not used, an RDRAM Continuity Module must

be installed in both sockets.

Removing the
Memory Expansion
Card

Removing and Replacing the Memory Expansion Card

Switch off the display and PC Workstation. Disconnect all power cables

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and any LAN or telecommunications cables.

Remove the PC Workstation’s cover (for further details, refer to the

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User’s Guide).

Remove the HP UltraFlow Airflow Guide to obtain access to the RDRAM

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Memory Expansion Card.

For ease of installation, place the PC Workstation on its side with the

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system board facing upwards.

To access the Memory Expansion Card, remove the retaining bar that is

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in front of it (remove the screw and swing the retaining bar outwards).

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