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PCUpgradeDex answers one question: what fits this exact machine? You pick your laptop, desktop or motherboard and see how many memory slots it has, the type of memory it takes and the most memory people run in it, the SSD it takes and how fast its slot is, and for laptops the battery and charger. Desktops and motherboards also show the processor socket and graphics card slots.

The answers come from 221,414 hardware reports of real machines in the Linux Hardware Database and from ENERGY STAR certification data, counted by the rules on How we check. When the reports don't agree, the page says that instead of picking a side.

The site is independent. It isn't affiliated with Lenovo, Dell, HP, ASUS, Acer or any other maker, and maker names are used only to identify their machines.

We earn a commission when you buy through the Amazon links, at no extra cost to you. That never changes an answer. See the affiliate disclosure.