* [[Dk'tronics memory expansion|Dk'tronics Memory Expansion and Silicon Disc]] - 64K and 256K expansions
* [[Dobbertin Memory Expansion]]
* [[CPC4MB]] (DIY) - compatible with standard 512 Kbyte expansion (plus extra extended-standard 3.5 MBbyte)
* [[RAM BOX]] 512Kb memory expansion '''(is that lowercase "b" meaning 512kbit=64Kbyte ???)'''
* [[SYMBiFACE II]] - includes (among others) 512K RAM expansion
== Extended-Standard Expansions ==
* [[CPC4MB]] (DIY) - compatible with standard 512 Kbyte expansion (plus extra extended-standard 3.5 MBbyte)
* [[RAM7 2Mb memory expansion]] - compatible with standard 512 Kbyte expansion (plus extra extended-standard 1.5 MBbyte)
== Semi-Standard Expansions ==
== Expansions that are unknown how they work, and if they are standard or not ==
* [[RAM7 2Mb memory expansion]] - is that '''2Mbit or 2Mbyte? what I/O ports''' would be used to access 2MByte?
* [[Data Media SP64]] - all unknown
* [[Phoenix M64]] - all unknown