IBM Thinkpad A21m 2633-GTG memory
Maximum Memory: 512mb
Base Memory: 64mb (Removable)
Upgrade Sockets: 2 (2 banks of 1)
ThinkPad A21 contains two memory sockets, one of which can be upgraded by the user. To upgrade the standard memory, some disassembly may be required. Each socket can use a 256MB.
64Mb Part Number: 20L0254, 20L0264
128Mb Part Number: 20L0255, 20L0265
256Mb Part Number: 33L3069, 33L3070
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