NVMe (Non-Volatile Memory Express) is a fast way of connecting an SSD to the computer, using the same high-speed bus (PCIe) that the graphics card uses. It's the modern default for new SSDs in desktops and laptops.
How it compares
- Hard drive (HDD): the slow baseline. Mechanical, loud, cheap per GB.
- SATA SSD: a big jump over an HDD, but limited to the slower SATA connection.
- NVMe SSD: dramatically faster than a SATA SSD, especially for opening apps, booting, and large files.
You won't feel NVMe's raw speed in everyday browsing, but the difference is very noticeable for boot times, loading big games, and copying large files.
Do you need to know it?
Not really — you just buy an NVMe SSD and it slots into an M.2 slot on the motherboard. If you're upgrading an old PC that still has a hard drive, an NVMe SSD is the single biggest speed improvement you can make.
An old HDD → NVMe SSD is the classic "makes my old PC feel brand new" upgrade. Check the motherboard has an M.2 slot first.