PLDA, which earlier this year showed PCI Expresss 5.0 and Compute Express Link to work in the fifth version of the protocol, followed Synopsys by announcing the first design of the XpressRICH controller supporting PCI Express 6.0.
The bandwidth of lines in the PCIe 5.0 standard is 32 GT / s, and the stable joint operation of two cards at such a high speed was successfully demonstrated by PLDA earlier; however, the physical layer controller in the demo system was from Broadcom.
New modulation scheme doubles PCIe 6.0 bandwidth without switching to optical connection
The final PCIe 6.0 specifications should be adopted by the end of this year, but PLDA already has an IP-design for the controller capable of operating at 64 GT / s. To achieve this speed, it was necessary to change the signal modulation scheme from NRZ to PAM4, and forward error correction and integrity check (CRC) were also added.
Basic structure of the core of the new PCIe controller developed by PLDA
In modern data centers, power consumption is an important parameter, and the new XpressRICH series controller supports dynamic control of the number of active interface lines – in economy mode, traffic can be carried over fewer lines. Configurations from 1 to 16 lines are available. Fine power and clock control is also available.
The new development has support for SR-IOV, can work with virtual PCIe channels, is fully backward compatible with previous versions of PCI Express, and can optionally contain hardware encryption blocks according to the AES-GCM standard. More information about the PLDA XpressRICH PCIe 6.0 controller can be found on the company’s website. Availability in silicon is expected in the fourth quarter of this year. But already the samples are capable of operating at frequencies up to 2 GHz using the 5 nm process technology.
PCI-SIG Consortium plans to double throughput every 3 years
However, any noticeable influence of PCI Express 6.0, for sure, will pick up much later, as is happening now with the PCIe 4.0 and 5.0 standards – you will have to wait for the development of the new standard by leading developers and manufacturers of processors and other components. Without them, the new bus will be an interesting exotic, albeit in demand: in particular, there are already 800 Gbps network solutions that could benefit from the transition to PCIe 6.0.
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