One thing about HPs- they are very picky with the manufacturers that make the memory modules. You stated that no matter what slot the new memory was in- it still registered as 128MB- did it change positions oh the position.. eg:
DIMM 0 - 128MB
DIMM 1 - 0 MB
and then when swapped:
DIMM 0 - 0MB
DIMM 1 - 128MB
or was it identical both times?
Also, you said it stayed the same when installed simeltaneously with the older RAM, do you mean it was still a total of 128MB or was it 256MB (128x2)?
DIMM 0 - 128 MB
DIMM 1 - 128 MB
when installing additional memory on my computer, the computer only recognizes half of the new memory. i installed 256 mb of pc133sdrdimm into an hp pavillion 500s computer. the computer had 128 mb sdram in it. the new ram is recognized as 128 mb whether it is installed simultaneously with old ram or alone. i checked bios and it simply shows the new ram as 128 mb regardless of the installation slot.
os: windows xp
model: hp pavillion 500s -- bought november 2001
1.2 ghz intel celeron processor
old ram: 128 mb sdr dimm
new ram 256 mb pc133 sdrdimm -- pny
according to hp website (also pny and crucial), the max ram on this computer is 512 mb.
i need to see if there's anything i am missing/doing wrong ... or just anything i can do to help the upgrade process.
the only thing i can think is that my motherboard simply is maxed out at 256mb