PCIe is a popular expansion card interface for desktop and laptop computers, as well as some embedded devices. PCIe slots come in different sizes, but what does that mean for your computer?
PCIe slots are measured in millimeters, so the smallest PCIe slot is 25mm wide, and the largest is 75mm wide. The slots also have a height of 18mm.
Some laptops have two PCIe slots that are the same size (25mm), while others have two PCIe slots that are different sizes (50mm and 75mm).
The important thing to remember is that PCIe cards will not fit into a slot that is not the correct size. If you want to use a PCIe card in a slot that is not the correct size, you will need to purchase a PCIe card adapter.
There are also some cases where the laptop may not have any PCIe slots at all, in which case you will need to purchase a new laptop.
