The rate of PCIe (Peripheral Component Interconnect Express) varies depending on the edition.

1.PCIe 1.0

1. It has a one-way transmission rate of 2.5Gbps (gigabits per second) per lane. This means that its bidirectional transfer rate (because data can be transmitted in both directions) is 2.5Gbps×2 = 5Gbps. The number of channels is typically expressed in terms of x1, x2, x4, x8, x16, and x32. For example, PCIe 1.0 x1 has a bandwidth of 2.5Gbps, while PCIe 1.0 x16 has a bandwidth of 2.5Gbps×16×2 (bidirectional) = 80Gbps.

2.PCIe 2.0

1. PCIe 2.0 doubles the rate on top of PCIe 1.0. Each lane is capable of 5Gbps unidirectional transmission and 10Gbps bidirectional transmission rate. For a PCIe 2.0 x8 interface, the bandwidth is 5Gbps×8×2 = 80Gbps.

3.PCIe 3.0

1. Compared to PCIe 2.0, the speed is doubled again. Each lane has a one-way transmission rate of 8Gbps and a bidirectional transmission rate of 16Gbps. For example, a PCIe 3.0 x16 interface has a bandwidth of 8Gbps×16×2 = 256Gbps.

4.PCIe 4.0

1. Each lane has a one-way transmission rate of 16Gbps and a bidirectional transmission rate of 32Gbps. The PCIe 4.0 x16 interface is capable of bandwidth of 16Gbps ×16×2 = 512Gbps, which provides more power for high-performance devices such as high-speed solid-state drives (SSDs) and high-end graphics cards.

5.PCIe 5.0

1. Each lane has a one-way transmission rate of 32Gbps and a bidirectional transmission rate of 64Gbps. In the case of PCIe 5.0 x16 configuration, the bandwidth can reach 32Gbps ×16×2 = 1024Gbps, which can meet the extremely high data transfer rate requirements, such as high-speed communication in data centers and next-generation graphics processing.

6.PCIe 6.0

1. Each lane has a one-way transmission rate of 64Gbps and a bidirectional transmission rate of 128Gbps. This further increases the speed of data transmission, but the equipment also has higher requirements in terms of hardware design and cost.

PCIe's high transfer rate makes it widely used in various high-speed device connection scenarios, such as graphics cards, solid-state drives, high-speed network cards and other devices to connect to motherboards.