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PCI Express 5.0 specification announced - Doubles peak bandwidth of PCIe 4.0
By Neil Soutter on May 30th, 2019 at 12:38pm - original article from game-debate

No sooner are we all getting excited about the newfound PCI Express 4 capabilities of the new crop of AM4 motherboards do PCI-SIG go and announced the PCIe 5.0 specification.

PCI-SIG has confirmed the PCIe 5.0 spec has been completed and sent out to its members. The headline change with PCI Express 5.0 is a doubling of the peak transfer bandwidth thanks to its new interconnect technology. This makes it around four times faster than the PCIe 3.0 technology which is commonplace today.

Development of the PCIe 5.0 took around 18 months, delivering IO improvements which allow for up to 32 GigaTexels/s raw bit rate and up to 128GB/s via an x16 configuration.

“For 27 years, the PCI-SIG has continually delivered new versions of I/O standards that enable designers to accommodate the never-ending increases in bandwidth required for next-generation systems, while preserving investments in prior generation interfaces and software,” noted Nathan Brookwood, a research fellow at Insight 64.

PCI Express 5.0 specification performance

“Over that period, peak bandwidth has increased from 133 MB/second (for the first 32-bit parallel version) to 32 GB/second (for the V4.0 by16 serial version), a 240X improvement. Wow! The new PCIe 5.0 standard doubles that again to 64 GB/second. Wow2. We have come to take this increased performance for granted, but in reality, it takes a coordinated effort across many members of the PCI-SIG to execute these transitions so seamlessly.”

PCIe 5.0 Specification Highlights

  • Delivers 32GT/s raw bit rate and up to 128GB/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