How much RAM does the IBM ThinkPad R400 support?

The ThinkPad R400 supports up to 8GB of memory across 2 slot(s), up to 4GB per slot.

What type of memory does the ThinkPad R400 use?

It uses DDR3 SODIMM memory modules.

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IBM ThinkPad R400Memory Upgrades

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System specifications for IBM ThinkPad R400

Specifications reported for the IBM ThinkPad R400.

Memory type: DDR3
Form factor: SODIMM
Memory slots: 2
Maximum memory: 8GB
Max per slot: 4GB
Rated speed: 1066 MT/s
Processor: Intel Core 2 Duo Processor Intel GM45 Chipset

Good to know

Faster modules automatically run at your system's maximum supported speed.
Maximum capacity per slot is inferred from total capacity ÷ number of slots.

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Checks the drivers on your IBM ThinkPad R400, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.

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Your system

IBM ThinkPad R400Memory Upgrades

Change system Auto-detect

6 guaranteed-fit options

This option is out of stock.

System specifications for IBM ThinkPad R400

Specifications reported for the IBM ThinkPad R400.

Memory type: DDR3
Form factor: SODIMM
Memory slots: 2
Maximum memory: 8GB
Max per slot: 4GB
Rated speed: 1066 MT/s
Processor: Intel Core 2 Duo Processor Intel GM45 Chipset

Good to know

Faster modules automatically run at your system's maximum supported speed.
Maximum capacity per slot is inferred from total capacity ÷ number of slots.

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

IBM ThinkPad R400Memory Upgrades

Choose your upgrade

System specifications for IBM ThinkPad R400

Software

IBM ThinkPad R400Memory Upgrades

Choose your upgrade

System specifications for IBM ThinkPad R400

Software