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Posts: 14
Registered: ‎10-28-2009
Location: USA
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IBM ThinkCentre S50 8183-32U (Memory Compatibility) Help!

[ Edited ]

I'm looking to upgrade my IBM ThinkCentre S50 8183-32U;

Here is what I know:


333Mhz DDR SDRAM (PC2700)
184 pin DIMM sockets (2GB Max)


What I don't know is if the RAM that is compatible with this machine is High Density, Low Density, or both...  Could someone please explain and fill me in?  Smiley Sad


Please reference the following:

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Posts: 14
Registered: ‎10-28-2009
Location: USA
0 Kudos

Re: IBM ThinkCentre S50 8183-32U (Memory Compatibility) Help!

Oh come on!  No one knows for sure?  Smiley Sad  So far I have verified that low density memory will work, however I haven't verified high density yet.  I've asked multiple webstores about the compatibility but the response is always either verifiying what I already know, or linking me to "IBM tested and compatible Memory" that they sell for 80% more money than normal memory.  Ugh!  What is this crap!?

What's DOS?
Posts: 1
Registered: ‎02-23-2012
Location: USA
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Re: IBM ThinkCentre S50 8183-32U (Memory Compatibility) Help!

Did you ever figure this out?  I have the same question.  Where did you find out that low density is compatible?


In the following link, it appears that low and high density are used to refer to the amount of RAM on each chip.


On wikipedia, density seems to relate to chip configuration and high density is only compatible with 10% of motherboards.


I guess the answer is here where it says that IBM only uses low density:



"In summary:-

  • LOW DENSITY modules have 100% compatibility with ALL systems and ALL chipsets as it fully follows JEDECguidelines.
  • HIGH DENSITY modules only have 10% compatibility and are VERY SLOW as it breaks all JEDEC guidelines.

This is also why almost all Branded-Name systems such as Apple/MAC, Compaq/HPDell and IBM only uses LOW DENSITY modules."


In this case it seems it's not worth gambling on the cheap price that high density always seems to have.