Official Nintendo 64 Expansion Pak
The Expansion Pak allows the random access memory (RAM) of the Nintendo 64 console to increase from 4 megabytes (MB) to 8 MB of contiguous main memory. With the help of an included key, the Expansion Pak fits into the slot that is below a removable panel on the top of the N64 console. Grab it quick to improve your Nintendo 64's performance!
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