• Solder-down SODIMMs?

    From Don Y@21:1/5 to All on Tue Jul 30 21:57:33 2024
    I can get some packaging advantages using COTS SODIMMs
    in a design. Cost can be a wash with soldered-down
    component memory.

    Downsides of using COTS memory *modules* is they
    entice users to remove/replace/upgrade/dick-with.
    And, typically come with the added cost of a socket
    (which is usually rated at just a handful of insertions).

    Anyone tried soldering-down SODIMMs (or SIMMs/DIMMs)
    in a production design? And, doing so in a way that
    doesn't forfeit the equivalent amount of real-estate?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jasen Betts@21:1/5 to Don Y on Sat Aug 3 13:26:49 2024
    On 2024-07-31, Don Y <blockedofcourse@foo.invalid> wrote:
    I can get some packaging advantages using COTS SODIMMs
    in a design. Cost can be a wash with soldered-down
    component memory.

    Downsides of using COTS memory *modules* is they
    entice users to remove/replace/upgrade/dick-with.
    And, typically come with the added cost of a socket
    (which is usually rated at just a handful of insertions).

    Anyone tried soldering-down SODIMMs (or SIMMs/DIMMs)

    Not going to work with any kind of DIMM as the contacts on both
    sides serve diferent purposes.

    It could work with simm

    in a production design? And, doing so in a way that
    doesn't forfeit the equivalent amount of real-estate?

    You could solder them in a slot I guess, if you can handle high-rise
    and deal with the routing issues.

    But why not solder ram chips instead? you have to find room for the
    chips, but you save on the space taken up by the connector.

    --
    Jasen.
    🇺🇦 Слава Україні

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to Jasen Betts on Sat Aug 3 12:18:14 2024
    On 8/3/2024 6:26 AM, Jasen Betts wrote:
    On 2024-07-31, Don Y <blockedofcourse@foo.invalid> wrote:
    I can get some packaging advantages using COTS SODIMMs
    in a design. Cost can be a wash with soldered-down
    component memory.

    Downsides of using COTS memory *modules* is they
    entice users to remove/replace/upgrade/dick-with.
    And, typically come with the added cost of a socket
    (which is usually rated at just a handful of insertions).

    Anyone tried soldering-down SODIMMs (or SIMMs/DIMMs)

    Not going to work with any kind of DIMM as the contacts on both
    sides serve diferent purposes.

    Yes, a colleague has sent photos of his approach to that.
    But, he's only looking to support *one* DIMM. I've started
    a "test" layout so we can put a few on the shaker table and
    see how they fare...

    It could work with simm

    in a production design? And, doing so in a way that
    doesn't forfeit the equivalent amount of real-estate?

    You could solder them in a slot I guess, if you can handle high-rise
    and deal with the routing issues.

    But why not solder ram chips instead? you have to find room for the
    chips, but you save on the space taken up by the connector.

    I'd have to put the RAM chips (or something else) on a daughter
    card (or four) to fit the space constraints. So, why not buy
    them already mounted on said cards (instead of trying to sort
    out what OTHER components can be off-boarded)?

    This also lets the rest of the design remain intact as
    the RAM complement changes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)