![A-Tech 8GB RAM for Lenovo THINKPAD T420 4177 | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Module at Amazon.com A-Tech 8GB RAM for Lenovo THINKPAD T420 4177 | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Module at Amazon.com](https://m.media-amazon.com/images/I/71I0JSeXBFL.jpg)
A-Tech 8GB RAM for Lenovo THINKPAD T420 4177 | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Module at Amazon.com
![CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com](https://m.media-amazon.com/images/I/71eVw9HLcEL._AC_UF894,1000_QL80_.jpg)
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com
![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/71Vz3D01fSL._AC_UF894,1000_QL80_.jpg)
OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com
![Lenovo ThinkPad T420 4178 - Intel Core i5 2520M / 2.5 GHz - vPro - Win 7 Pro 64-bit - HD Graphics 3000 - 4 GB RAM - 500 GB HDD - DVD-Writer - 14" 1366 x 768 (HD) - Walmart.com Lenovo ThinkPad T420 4178 - Intel Core i5 2520M / 2.5 GHz - vPro - Win 7 Pro 64-bit - HD Graphics 3000 - 4 GB RAM - 500 GB HDD - DVD-Writer - 14" 1366 x 768 (HD) - Walmart.com](https://i5.walmartimages.com/seo/Lenovo-ThinkPad-T420-4178-Intel-Core-i5-2520M-2-5-GHz-vPro-Win-7-Pro-64-bit-HD-Graphics-3000-4-GB-RAM-500-HDD-DVD-Writer-14-1366-x-768-HD_926404cc-06dc-4a01-96ab-8a6851085977_1.9888f36ff8eec98fd47751ef0812d4e6.jpeg)
Lenovo ThinkPad T420 4178 - Intel Core i5 2520M / 2.5 GHz - vPro - Win 7 Pro 64-bit - HD Graphics 3000 - 4 GB RAM - 500 GB HDD - DVD-Writer - 14" 1366 x 768 (HD) - Walmart.com
![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.jpg)
OFFTEK 4GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad T420 (DDR3-12800) Laptop Memory at Amazon.com
![Restored Lenovo ThinkPad T420 Laptop i5-2520M 2.50GHz 8GB RAM 320GB HDD Win 10 Home (Refurbished) - Walmart.com Restored Lenovo ThinkPad T420 Laptop i5-2520M 2.50GHz 8GB RAM 320GB HDD Win 10 Home (Refurbished) - Walmart.com](https://i5.walmartimages.com/asr/54997856-5e0a-4300-8d85-cd36a1251401_1.6dfa821db43f467a4a3144505f286e79.jpeg)
Restored Lenovo ThinkPad T420 Laptop i5-2520M 2.50GHz 8GB RAM 320GB HDD Win 10 Home (Refurbished) - Walmart.com
![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_UF894,1000_QL80_.jpg)