Reading 128mb ram but it is actually a 256mb ram

By PV458
Jul 2, 2009
  1. Hi, I have a Dell Latitude LS H400ST with PentiumIII 398mhz processor. It came originally with 128mb ram and a 6 gb Harddrive. I just bought a 256mb ram stick and installed it, but it is still only reading 128 ram, and it is acting the same as always. Please help, I contacted Dell and they said it will only run 128mb but they offer a 256mb stick for MY computer (Based on my Service Tag). I need help.
  2. wolfram

    wolfram TechSpot Paladin Posts: 1,967   +9

    Well yeah could be a BIOS limitation, or a bad stick. That happened to me, I bought a 512MB stick and was reading 256MB only. Turned out I had to RMA it :-(

    If you can, try it out on another PC :)
  3. FoReWoRd

    FoReWoRd TS Rookie Posts: 204

    128 might be the max the motherboard can handle
  4. Rick

    Rick TechSpot Staff Posts: 4,573   +65

    You need to purchase 'low density' memory, and your best bet is a dual rank module.

    It looks like this:

    Not like this...
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