What RAM is compatible with the ThinkPad ThinkPad T420?

The ThinkPad ThinkPad T420 supports up to 16GB of DDR3 PC3-12800 1600MHz RAM across 2 slot(s). Compatible modules are listed above with live pricing.

Can I upgrade the RAM in my ThinkPad ThinkPad T420?

Yes, the ThinkPad ThinkPad T420 supports RAM upgrades. The device has 2 RAM slot(s) and supports a maximum of 16GB.

RAM for ThinkPad ThinkPad T420 (4177)

Name: RAM for ThinkPad ThinkPad T420 4177
Brand: ThinkPad

Model Years: 2011–2012

Max RAM: 16GBRAM Slots: 2RAM Type: DDR3 PC3-12800 1600MHz

✓ RAM Upgradeable

Compatible RAM for the ThinkPad ThinkPad T420

Crucial 8GB DDR3L-1600 SODIMM

CT8G3S160BM

HIGH

DDR3 PC3-128001600MHz8GBSO-DIMM

Crucial 8GB DDR3L-1600 SODIMM

8 listings

Kingston 4GB DDR3L-1600 SODIMM

KVR16LS11/4

HIGH

DDR3 PC3-128001600MHz4GBSO-DIMM

Kingston 4GB DDR3L-1600 SODIMM

9 listings

RAM Upgrade Guide for the ThinkPad ThinkPad T420

This device uses DDR3 PC3-12800 at 1600MHz. Maximum supported capacity is 16GB.

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.