2 new Samsung Wallstreet 256MB memory modules, only showing 128MB each

[mkinn]

Just bought 2 new Samsung 256MB 3.3V PC133 144 pin non-ecc SDRAM SODIMM modules, installed them, and only got 256MB instead of 512MB. Working fine for 2 hours so far. I read something about needing low density memory modules, but I cannot find any. Is there anybody selling these? Anybody want to get rid of some? Need 2, but would buy 4 if available. 2 machines. I wish there was some way to modify the CPU module to use these, but can't find anything on that, either. I'm using a 233Mhz CPU module in a 300 PDQ, waiting on parts to fix the 300Mhz CPU module.

 

[croissantking]

You have a couple of options here:

- find low density 256MB RAM modules with 8 chips on each side (preferred). e.g. Crucial CT32M64S4W7E.16FGYU.

- get 512MB modules, which should be recognised as 256MB each.

 

[Byrd]

The most compatible SDRAM So-DIMM modules for these were the double-height, single sided modules - have a look around for second-hand modules that look the part. It was very common for random brands to not work in the Wallstreet which is known to be quite picky with RAM.

 

[croissantking]

I wish there was some way to modify the CPU module to use these, but can't find anything on that, either.

It’s a hard addressing limit of the memory controller, so no way to get around that.