This Machine can take ECC or non-ECC memory. When you mix ECC with
non-ECC, the ECC function will be disabled. For the ECC memory see
"Hewlett Packard Kayak XM600 550 (ECC) Memory"
This Machine may require a BIOS upgrade to use 8 device 256MB, 4 device 128MB, or 2 device 64MB Rambus modules.
Important Note:
SDRAM was available on some XM600 models shipped before May 2000. In order to upgrade this system with Rambus RDRAM you must first remove the SDRAM and then the memory expansion module. For further details click here
