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PCIe 5.0 specifications have been officially announced, bringing its peak bandwidth to 128GB/s

By Wong Chung Wee - on 4 Jun 2019, 11:05am

PCIe 5.0 specifications have been officially announced, bringing its peak bandwidth to 128GB/s

Image source: PCI-SIG

The official PCI Express 5.0 specifications have been announced by PCI-SIG (Peripheral Component Interconnect Special Interest Group). It effectively doubles the peak bandwidth of current PCIe 4.0 from 64GB/s to 128GB/s via x16 configuration.

Image source: PCI-SIG

PCIe 5.0 delivers 32GT/s raw bit rate, and also implements “electrical changes to improve signal integrity and mechanical performance of connectors”. It’s backward compatible with PCIe 4.0, 3.x, 2.x and 1.x. According to PCI-SIG, the new specification increases performance in market segments that include “artificial intelligence, machine learning, gaming, visual computing, storage and networking.”

Due to the 7-year delay between the ratification of PCIe 4.0 and PCIe 3.0 standard, the official announcement of PCIe 5.0 specifications supercedes the availability of PCIe 4.0-based products. There’s light at the end of the tunnel as there were PCIe 4.0-based SSDs announced at the recently concluded Computex 2019.

PCIe 5.0 Specification Highlights

  • Delivers 32 GT/s raw bit rate and up to 128 GB/s via x16 configuration
  • Leverages and adds to the PCIe 4.0 specification and its support for higher speeds via extended tags and credits
  • Implements electrical changes to improve signal integrity and mechanical performance of connectors
  • Includes new backwards compatible CEM connector targeted for add-in cards
  • Maintains backwards compatibility with PCIe 4.0, 3.x, 2.x and 1.x

For now, only the AMD X570 chipset, to be paired with the upcoming Ryzen 3000 series processors, support PCIe 4.0 natively. With PCIe 4.0 products just announced, end consumers will likely have to wait a few years before PCIe 5.0-based products see the light of day.

Source: PCI-SIG via Businesswire