If you're looking for a boost in performance, you may want to upgrade your RAM. If you have inadequate amounts of RAM, some of the processes could be handed to the hard drive, slowing your machine immensely. Depending on your use, a replacement or upgrade in RAM could increase system performance. More RAM allows for multiple processes to be ran quickly and efficiently.


No parts required.

Flip over the laptop so the bottom is facing up.
  • Flip over the laptop so the bottom is facing up.

  • Unscrew the two black 5mm screws on the memory panel with your Phillips #0 screwdriver.

  • These screws are attached to the panel and are not made to be removed.

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Push the metal clips away from the RAM.
  • Push the metal clips away from the RAM.

  • Slide out and lift the RAM.

  • When replacing ram be sure to align correctly and remove carefully to avoid damage.

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To reassemble your device, follow these instructions in reverse order.

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Tristan Broughton

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Cal Poly, Team 6-13, Maness Spring 2015 Member of Cal Poly, Team 6-13, Maness Spring 2015


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This is only part of the game. There is another slot located under the keyboard. Lenovo wants this slot to be used first when only one of the two are needed.

cosy69 - Reply

It may require a BIOS update (or not) but the Lenovo T420s supports 16GB of RAM.

Bryan Montford - Reply

This is not the Lenovo Thinkpad T420. You can Tell by the RAM memory Slot Cover and the Position the RAM is put into its slot. the T420 RAM is Vertical Compared with being Horizontal in this Picture. that includes the cover also. Then the Battery Slot is a Dead Giveaway clue. The T420 Battery slot is in the middle. and this Picture has the battery slot to bthe left. Sorry Not Even Close. None of the screws he removes are on the T420. so this is Completely Useless. Thanks

Keith Cloward - Reply

@Keith Cloward

This is a guide for the T420S, not the T420.

Eric Van de Kerckhove - Reply

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