Crucial® Memory Advisor results for the IBM ThinkPad X21 Series (Type 2662) Laptop/Notebook.

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device type: notebook

Your ThinkPad X21 Series (Type 2662) System Specs

System specs as shipped by the manufacturer.
Scan your system to view your specific system configuration.

Memory:

SDRAM, PC133

Memory Type: SDRAM, PC133, SDRAM (non-ECC)
Maximum Memory: 320 or 384MB
Slots: 1

All memory slots may be filled, some of the existing memory may need to be removed in order to upgrade.Systems shipped with 64MB of onboard memory have a system maximum of 320MB. Systems shipped with 128MB of onboard memory have a system maximum of 384MB

How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found here.

Memory or DRAM is the "working" memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.

video - installing memory

Guaranteed-compatible upgrades for your IBM ThinkPad X21 Series (Type 2662)

Computer Memory