Celeb Glow
general | February 28, 2026

What does "on MB" mean in the context of laptop memory?

I'm looking at Lenovo laptops, and the two memory options for one machine are "8GB PC3-12800 DDR3L on MB" and "16GB PC3-12800 DDR3L on MB". What does "on MB" mean in this context? Does this mean "on motherboard" and mean that the memory is embedded in the motherboard (and therefore more difficult or impossible to upgrade by buying laptop RAM sticks separately)?

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1 Answer

Short answer

Yes, it means it's built into the motherboard so you can't upgrade it!

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