What RAM is compatible with the ThinkPad ThinkPad T400?

The ThinkPad ThinkPad T400 supports up to 8GB of DDR3 PC3-8500 1066MHz RAM across 2 slot(s). Compatible modules are listed above with live pricing.

Can I upgrade the RAM in my ThinkPad ThinkPad T400?

Yes, the ThinkPad ThinkPad T400 supports RAM upgrades. The device has 2 RAM slot(s) and supports a maximum of 8GB.

RAM for ThinkPad ThinkPad T400 (2764)

Name: RAM for ThinkPad ThinkPad T400 2764
Brand: ThinkPad

Model Years: 2008–2010

Max RAM: 8GBRAM Slots: 2RAM Type: DDR3 PC3-8500 1066MHz

✓ RAM Upgradeable

Compatible RAM for the ThinkPad ThinkPad T400

Crucial 4GB DDR3-1066 SODIMM

CT51264BC1067

HIGH

DDR3 PC3-85001066MHz4GBSO-DIMM

Crucial 4GB DDR3-1066 SODIMM

8 listings

Kingston 2GB DDR3-1066 SODIMM

KVR1066D3S7/2G

HIGH

DDR3 PC3-85001066MHz2GBSO-DIMM

Kingston 2GB DDR3-1066 SODIMM

10 listings

RAM Upgrade Guide for the ThinkPad ThinkPad T400

This device uses DDR3 PC3-8500 at 1066MHz. Maximum supported capacity is 8GB.

This model has 2 RAM slots. Installing matched pairs (dual-channel) gives the best performance — use identical capacity modules in both slots.

Always power off and unplug your device before installing RAM. Ground yourself to avoid static discharge.