COMPUTER FUNDAMENTALS

Detailed explanation-1: -Peripheral Component Interconnect Express (PCIe or PCI-E) is a serial expansion bus standard for connecting a computer to one or more peripheral devices.

Detailed explanation-2: -PCIe, or peripheral component interconnect express, is an interface standard for connecting high-speed input output (HSIO) components. Every high-performance computer motherboard has a number of PCIe slots you can use to add GPUs, RAID cards, WiFi cards, or SSD (solid-state drive) add-on cards.

Detailed explanation-3: -PCI Express is a serial connection that operates more like a network than a bus. Instead of one bus that handles data from multiple sources, PCIe has a switch that controls several point-to-point serial connections.

Detailed explanation-4: -PCI is a parallel interface whereas PCIe is a serial interface. PCI uses individual buses for each of the devices connected to it instead of a shared one like what PCIe uses. The difference in speed between standard PCI interface and 16 slot PCIe is large.