I have acquired an HP X4000 workstation which appears to use the Tyan
Thunder i860 S2603 motherboard with a 4 slot memory extension board.
The problem is that only certain RDRAM sticks seem to work in this
system (strangely enough they seem to be the HP branded memory). Other
PC800-45 ECC memory is either not recognized or in the case of the
Kensington memory shipped in the system, only 1/2 of the stated memory
size is seen (i.e. , a 256mb stick is seen only as a 128mb stick).
Internet searches have not been particularly fruitful, other than
finding a list of about 1/2 dozen recommended types on the Tyan website.
Since I was always under the impression that one PC800 ECC RDRAM stick
was the same as any other, I am a bit puzzled. Can anyone reduce my
state of ignorance here?
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