PCIeBandbreite

PCIeBandbreite, or PCIe bandwidth, refers to the maximum rate of data transfer that a Peripheral Component Interconnect Express (PCIe) interface can achieve. PCIe is a high-speed serial computer expansion bus standard used to connect various hardware components, such as graphics cards, solid-state drives, and network interface cards, to a computer's motherboard. The bandwidth of a PCIe connection is determined by several factors, including the PCIe generation and the number of lanes used.

Each generation of PCIe offers a significant increase in bandwidth compared to its predecessors. For example, PCIe 3.0 offers approximately 1 GB/s per lane, while PCIe 4.0 doubles this to around 2 GB/s per lane, and PCIe 5.0 further doubles it to approximately 4 GB/s per lane. The number of lanes, denoted as x1, x4, x8, or x16, also directly multiplies the bandwidth. A PCIe x16 slot, for instance, has 16 lanes, providing 16 times the bandwidth of a single lane.

Understanding PCIe bandwidth is crucial for optimizing system performance. Components that require high data throughput, such as high-end graphics cards and NVMe SSDs, benefit greatly from interfaces with higher bandwidth. Insufficient bandwidth can lead to performance bottlenecks, where the component's capabilities are limited by the speed of its connection to the rest of the system. Therefore, selecting components and motherboards with compatible and sufficient PCIe bandwidth is important for achieving optimal system performance.