Intro
Peripheral Component Interconnect Express (PCIe) is a high-speed interface that connects components like graphics cards, SSDs, and network cards directly to the CPU.
PCI express is mostly divided by the number of lanes a slot has. This goes from the most basic x1 to x2, x4, x8, and all the way up to x16. Each additional lane is another path for the transmission of data, exponentially increasing the transfer spee
PCIe SSD
Unlike SATA, which is limited by design to slower data transfer rates, PCIe has multiple data lanes—typically x2 or x4 lanes for M.2 SSDs—allowing much higher bandwidth. This means data can travel at a much faster rate, dramatically improving tasks that require quick access to data, such as system boots, software launches, and large file manipulations https://www.seagate.com/blog/types-of-ssd-sata-nvme-m2-u2-and-pcie/