PCI Express 7.0 standard announced: it will arrive in 2025

In 2025, the next generation of the PCI-Express (or PCI-E) standard will arrive . Announced by PCI-SIG (the consortium that develops and maintains the PCI-Express standard), this is version 7.0 which brings with it a data output up to 512 GB / s (bi-directional) using a 16 bus. channels (16x).

PCI Express

The announcement comes on the 30th anniversary of the standard, as communicated by the PCI-SIG itself:

For the past 30 years, PCI-SIG has been at the forefront of technological innovation. Our PCI Express (PCIe) specification has retained its de facto preferred interconnect location and a crucial component in computers. At the PCI-SIG Developers Conference 2022, we celebrated our 30th anniversary with the announcement of the next evolution in PCIe technology: the PCIe 7.0 specification. The upcoming PCIe 7.0 specification is expected to once again provide a speed boost in three years, expanding the data rate of the recently released PCIe 6.0 specification to 128 GT / s. The PCIe 7.0 specification is scheduled for release to members in 2025.

Thrilling speed for the new 7.0 standard

The new standard brings with it a higher bandwidth, double the previous standard (64 GT / s for the 6.0 standard vs 128 GT / s for the 7.0 standard), with the following characteristics:

  • Offers raw bit rate of 128 GT / s and up to 512 GB / s bidirectionally via x16 configuration
  • Use of PAM4 signaling (Pulse Amplitude Modulation with 4 levels).
  • Focus on channel parameters and coverage
  • While continuing to deliver low latency and high reliability
  • Energy efficiency improvement
  • Maintain backward compatibility with all previous generations of PCIe technology

Such high speed values ​​preclude greater difficulty in physical implementation. Motherboard manufacturers will certainly have to deal with a greater work of optimizing the connection lines , which will certainly have to be smaller than the current ones to ensure excellent signal quality. An increase in the costs of motherboards is therefore expected due to the greater investment by the manufacturers.

At the moment on the market we find only some Intel platforms with support for the PCI Express 5.0 standard. From AMD they will arrive towards the end of 2022. During the next few years we will therefore see the release of motherboards with support for 6.0 and then reach 7.0 in 2025.

Features of PCI Express

Peripheral Component Interconnect Express (PCI Express), officially abbreviated to PCIe, is a standard for serial bus interface expansion for computers . Designed for faster and faster speeds, it replaces the old PCI, PCI-X and AGP standards.

It is based on a serial data transfer, unlike the parallel one of the PCI, which simplifies the PCB layout of the motherboards and consists of a series of channels . The most current standards offer up to 16 independent channels. This allows considerable modularity, as more channels can be aggregated to increase the available bandwidth or to support particular configurations, such as the use of two or more video cards; furthermore, the bandwidth of each channel is independent from that of the others .

It therefore replaces the old PCI, the bus standard developed by Intel in the early 90s . It came on the market in 1993 to connect the CPU with the most varied internal peripherals of the computer through the motherboard. The transmission speed of the PCI interface has remained anchored at 132 MBytes / s over the years, generated by a data transmission with a 32-bit clock frequency of 33 MHz.

Although the PCI interface has marked a significant step forward in the evolution of PCs, both for the low cost and for the good (and initially sufficient) performances that have decreed its mass diffusion, the first limits were not felt very much. later in systems such as servers and workstations, where very high speed is required for data transmission.

The article PCI Express 7.0 standard announced: it will arrive in 2025 was written on: Tech CuE | Close-up Engineering .