I have a Lenovo Thinkpad T420 Core i5 2520M. What is the maximum memory I can have - 8 GB or 16 GB? - Quora
![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.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
![HD] Reinstalling the Keyboard/2nd RAM Slot on a Lenovo Thinkpad T420 T410 T400 X220 X200 Edge W - YouTube HD] Reinstalling the Keyboard/2nd RAM Slot on a Lenovo Thinkpad T420 T410 T400 X220 X200 Edge W - YouTube](https://i.ytimg.com/vi/YEFAZ0Sdztw/maxresdefault.jpg)
HD] Reinstalling the Keyboard/2nd RAM Slot on a Lenovo Thinkpad T420 T410 T400 X220 X200 Edge W - YouTube
![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/51VR4-D226L.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
![16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com 16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com](https://m.media-amazon.com/images/I/71z2T6h7ikL._AC_UF894,1000_QL80_.jpg)