PCI Express 6.0 spec is finalized, doubling bandwidth for SSDs, GPUs, and more

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PCI Special Interest Group (PCI-SIG) Ultimate version 6.0 of the PCI Express standard, the communication bus that allows everything inside your computer to communicate. The new version of the device comes nearly three years after the PCI Express 5.0 spec was finalized, and version 6.0 once again increased the bandwidth of the PCIe lane from 32GT/s (8GB/s in total, or 4GB/s in each direction). doubles it. to 64GT/s (16GB/s, or 8GB/s in each direction). For a full 16-lane PCIe 6.0 connection, this amounts to as much as 256GB/s of total bandwidth, compared to 32GB/s or 64GB/s of the now-common PCIe 3.0 and 4.0 connections.

Like previous PCIe versions, PCIe 6.0 will “maintain backwards compatibility” with all current PCIe versions so that your PCIe 4.0 GPU or SSD will continue to operate in the PCIe 6.0 slot and vice versa. PCI-SIG brags about the longevity of the specification a blog post By Debendra Das Sharma, PCI-SIG board member: “An interconnect technology is considered successful if it can sustain three generations of bandwidth improvements in a decade. The PCI architecture far exceeds that mark.”

PCI Express speed comparison.  Note that these bandwidth numbers are bidirectional—if you're only sending or receiving only data, you'll only have half the bandwidth.
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To boost its speed, PCIe 6.0 uses a new type of signaling called “Pulse Amplitude Modulation 4” (PAM4), which allows for faster data transfer than previous non-return-to-zero (NRZ) signaling. allows for. error rate. To compensate, PCIe 6.0 includes technologies such as forward error correction (FEC) to correct errors and cyclic redundancy checking (CRC) to ask for packets to be resend if errors are not corrected. PCI-SIG says this combination of technologies should catch all errors without adding latency to the connection.

Consumer systems are just starting to support PCIe Express 5.0—Intel’s 12th-generation Core processors provide 16 PCIe 5.0 lanes, and AMD plans to support PCIe 5.0 with its upcoming Zen 4 architecture and Ryzen 7000-series CPUs. making plans. For now, PCIe 4.0 remains the most commonly used version for high-end SSDs and current-generation GPUs, and most budget PCIe SSDs still use PCI Express 3.0, which is more widely used by older systems. is supported by and still very fast for most things. Recognizes PCI-SIG Its PCIe 6.0 FAQ That newly conceived bandwidth is not necessary for most consumer applications, it is instead offered as an upgrade to data centers and artificial intelligence and machine learning systems.

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PCI-SIG expects PCIe 6.0 products to hit the market within 12 to 18 months.

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