Upgrading Main Memory Modules - HP Kayak XA 05xx 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 Registered ECC SDRAM
memory module be added to a second DIMM slot to upgrade the
memory?
No, it cannot. Registered memory modules are not supported.
To upgrade the memory, you can only use either, 100 MHz
ECC or Non-ECC SDRAM unbuffered memory modules.
HP Kayak XA Series 0503 and 0541 PC Workstations are equipped with a
100 MHz Front Side Bus (FSB), and therefore uses only 100 MHz
unbuffered ECC or Non-ECC SDRAM memory modules. Memory modules
running at 66 MHz are not supported by the 100 MHz FSB.
The main memory controller supports three DIMM sockets: Mem 1, Mem 2
and Mem 3. Each socket can host a 168-pin SDRAM memory module,
running at 100 MHz, supporting unbuffered memory modules only. These
are available in 32 MB, 64 MB, 128 MB and 256 MB unbuffered ECC SDRAM
and non-ECC memory modules. A maximum of 768 MB using multiples
(3 x 256MB) unbuffered memory may be installed.
Upgrading Main Memory Modules
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