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takyon [soylentnews.org] writes:

PCIe 5.0 [wikipedia.org] is coming [tomshardware.com]:

The industry has been stuck on PCIe 3.0 for roughly seven years, and even though the first support for PCIe 4.0 on the desktop will land soon in AMD's third-gen Ryzen chips and the first PCIe 4.0 SSDs just cropped up [tomshardware.com], the industry is already adopting PCIe 5.0. The new standard doubles throughput over PCIe 4.0, yielding a data rate of 32 GT/s.

Today PCI-SIG, the organization that defines PCIe standards, announced that it ratified Version 0.9 of the PCI Express 5.0 specification, signaling that end devices will come to market in the near future. (Companies design end devices as early as revision 0.4 and often launch with 0.9.)

[...] PCIe 4.0 brings 64GBps of throughput, while PCIe 5.0 will double that to 128GBps. Both revisions still use the 128b/130b encoding scheme that debuted with PCIe 3.0. PCI-SIG representatives said they are satisfied with the 20% reduction in overhead facilitated by the 128b/130b encoding, and further encoding refinements to reduce the current 1.5% overhead are subject to a diminishing point of returns.

PCIe 5.0 also brings other features, like electrical changes to improve signal integrity, backward-compatible CEM connectors for add-in cards, and backward compatibility with previous versions of PCIe. The PCI-SIG also designed the new standard to reduce latency and tolerate higher signal loss for long-reach applications.

Previously: PCIe 4.0 to be Available This Year, PCIe 5.0 in 2019 [soylentnews.org]

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