2023-06-13 23:50:00
PCIe connectivity is something that has significantly limited the interaction between computers, cards, and other equipment within data centers, and for this reason, in the last five years, efforts have been redoubled to accelerate the development of specifications. Although the consumer sector is in the PCIe 5.0 version, data centers are already testing PCIe 6.0 and the PCI SIG has the PCIe 7.0 specification in advanced development. They have now released, as planned, draft 0.3.
This specification will once again double the speed of PCIe 6.0, which is also twice the speed of PCIe 5.0. The bandwidth for a full duplex connection (simultaneous sending and receiving) PCIe 7.0 ×16 will be 512 GB/s, compared to 64 GB/s for PCIe 4.0.
The PCI-SIG plan is to double the speed of the PCIe connection every three years, which is an ambitious roadmap and one that it probably won’t be able to sustain at some point. But neither do they want the PCI-SIG to happen again as with the step from PCIe 3.0 to 4.0, which took seven years to approve, and a few more to reach the market.
Along with this 0.3 specification of PCIe 7.0, PCI-SIG has also announced new cabling specifications for PCIe 5.0 and 6.0 that will be published by the end of this 2023. The idea is to be able to use the PCIe connection in long-distance cables, which you need your own specification as the PCIe signal degrades quickly. Being able to use it in cables gives flexibility to the PCIe connections between cards within the same server, but also makes the connection between different servers in the same rack more flexible.
Via:
AnandTech.
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