Article · Wikipedia archive · Last revised Jun 15, 2026

RAM pack

RAM pack, RAMpack, RAM expansion cartridge, RAM expansion unit (REU), memory expansion pak and memory module are some of the most common names given to various self-contained units or cartridges that expand a computer, games console or other device's own internal RAM in a user-friendly manner.

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Jun 15, 2026
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Sinclair ZX81 with 16 KB "RAM pack" expansion attached at the rear source ↗

RAM pack,12 RAMpack, RAM expansion cartridge, RAM expansion unit (REU),3 memory expansion pak4 and memory module5 are some of the most common names given to various self-contained units or cartridges that expand a computer, games console or other device's own internal RAM in a user-friendly manner.

Such units are generally designed to be installable by an end-user with little technical knowledge, often simply by plugging them into an expansion or cartridge slot easily accessible at the rear of the machine (e.g. the Sinclair ZX81 or the VTech Laser 2006), or via a user-accessible hatch (e.g. the Atari 800's CX852 and CX853 modules or the Nintendo 64 Expansion Pak7).

The ZX81 16K RAM expansion gained particular notoriety for the "RAM pack wobble" problem89 because it was top-heavy and only supported by the edge connector. This could lead to it falling out, crashing the ZX81 and losing any program or data currently in the computer's memory.

Examples of such memory expansions include:

References

References

  1. http://fjkraan.home.xs4all.nl/comp/zx80/rampack.html Deprecated link archived 2013-02-22 at archive.today (shown as "RAM pack" on 1–3 KB unit itself)
  2. http://www.jupiter-ace.co.uk/hardware_rampacks.html (shown as "RAM pack" on manual)
  3. John Christian Lønningdal. "Commodore Retro Heaven". Retro.lonningdal.net. Retrieved 2014-03-25.
  4. "Nintendo 64 Expansion Pak". IGN. December 15, 1998. Retrieved February 22, 2023.
  5. "ATARI 1064 Memory Module". Rhod.fr. Retrieved 2014-03-25.
  6. "Disk smith vz200 with ram expansion". 2007-07-31. Retrieved 2014-03-25 – via WikiMedia Commons.
  7. "Customer Service | Nintendo 64 - Installing the Nintendo 64 Expansion Pak". Nintendo. Retrieved 2014-03-25.
  8. "Sinclair User 13 - Hardware World". Archived from the original on 2012-02-07. Retrieved 2012-06-14. (cf. "...stops any RAM pack wobble..." referring to problems with the original Sinclair unit)
  9. "Sinclair User 18 - Hardware World". Archived from the original on 2011-06-14. Retrieved 2012-06-14. ("...another solution to RAM pack wobble...")