PCIeProtokoll

PCIeProtokoll

The PCIeProtokoll (Peripheral Component Interconnect Express Protocol) is a communication standard used for high-speed data transfer between components inside a computer, primarily connecting the motherboard to peripherals such as graphics cards, SSDs, and network cards. Developed by Intel and standardized as PCI Express (PCIe), it has become the predominant interface for internal expansion cards.

PCIe operates on a serial point-to-point architecture, allowing direct communication between devices and the motherboard without involving a central hub. The protocol supports multiple lanes, with each lane consisting of two differential signaling pairs for transmission and reception. Common configurations include x1, x4, x8, and x16 lanes, which determine bandwidth and transfer speeds.

The protocol employs a packet-based data transfer mechanism, where information is segmented into frames, including headers, payloads, and cyclic redundancy checks for error detection. It utilizes a layered architecture that manages physical signaling, data link, and transaction layers, ensuring reliable transmission.

PCIe supports high data throughput, with each lane capable of up to 1 GB/s in each direction in PCIe 3.0, and even higher speeds in subsequent generations. It also provides support for features like hot-plugging, power management, and error reporting, enhancing system stability and flexibility.

Overall, the PCIeProtokoll has become the standard for internal computer communication, combining high performance with flexibility and scalability, making it essential for modern computing hardware.