Upgrading Main Memory Modules; Mixing Memory Modules - HP Kayak XU03 User Manual

Upgrading Main Memory Modules

The PC Workstation has 64 MB of Non-ECC SDRAM main memory
installed in one DIMM slot. Can a 256 MB ECC SDRAM memory
module be added to a second DIMM slot to upgrade the memory?
No. To upgrade the memory, you can use 64 MB or 128 MB
memory modules (either ECC or Non-ECC). Or, alternatively,
replace the existing 64 MB memory module and install a 256
MB ECC SDRAM memory module.
Main memory modules are available in 64 MB, 128 MB and 256 MB ECC
SDRAM modules. However, it is important to note that the 64MB and 128
MB modules are non-buffered ECC SDRAM modules, while the 256 MB
modules are registered ECC SDRAM modules. Refer to the table on
for details on how much main memory can be installed on each PC
Workstation.

Mixing Memory Modules

Unbuffered and Registered ECC modules are not compatible with each
other, and cannot be mixed. If these have been mixed, this will be
Error!
detected in the basic pre-boot tests when you boot the system for the
first time. The BIOS checks that the inserted DIMMs are compatible with
RAM type
one another, and if it detects an error, it is reported to the HP MaxiLife.
The error message (shown on the left) will then be displayed on the LCD
status panel. Refer to the following table for DIMM compatibility rules.
Original DIMM Type
Unbuffered ECC
Registered ECC
1.
All DIMMs will function as Non-ECC.
HP XU and XW PC Workstations support only ECC DIMMs.
19
Adding Non-ECC
Yes
Non-ECC
Yes
No
(256 MB)
Adding
Unbuffered ECC
1
Yes
1 1
Yes
No
Upgrading Main Memory Modules
page 5
Adding Registered
ECC (256 MB)
No
No
Yes