![OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com](https://m.media-amazon.com/images/I/61mlx7jlbVL._AC_UF894,1000_QL80_.jpg)
OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com
![Memory RAM | 4GB - Lenovo ThinkPad T420 T-Series - (OEM-# 55Y3711, 55Y3717, 78Y7385) - 1333MHz, Unbuffered, 1,5V Memory RAM | 4GB - Lenovo ThinkPad T420 T-Series - (OEM-# 55Y3711, 55Y3717, 78Y7385) - 1333MHz, Unbuffered, 1,5V](https://www.compuram.biz/bilder/produkte/ram/ddr3_so-dimm-f2.jpg)
Memory RAM | 4GB - Lenovo ThinkPad T420 T-Series - (OEM-# 55Y3711, 55Y3717, 78Y7385) - 1333MHz, Unbuffered, 1,5V
![T420 still a good daily driver but looking to upgrade. Any good options for college/home? : r/thinkpad T420 still a good daily driver but looking to upgrade. Any good options for college/home? : r/thinkpad](https://preview.redd.it/t420-still-a-good-daily-driver-but-looking-to-upgrade-any-v0-8myq985f4m0a1.jpg?width=640&crop=smart&auto=webp&s=540cd4ea582cdfb291566e57f9b036f9cc9dab25)
T420 still a good daily driver but looking to upgrade. Any good options for college/home? : r/thinkpad
![OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com](https://m.media-amazon.com/images/I/71nBR0kPxZL._AC_UF350,350_QL80_.jpg)
OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com
![Lenovo Thinkpad T420 RAM SSD Hard Drive Optical CD DVD Drive Upgrade Repair Keyboard Replacement - YouTube Lenovo Thinkpad T420 RAM SSD Hard Drive Optical CD DVD Drive Upgrade Repair Keyboard Replacement - YouTube](https://i.ytimg.com/vi/Og-LbtGYFbM/maxresdefault.jpg)