PCI Express 6.0 is fast, but maybe TOO fast – Digi.no

PCI Express 6.0 is fast, but maybe TOO fast – Digi.no
PCI Express 6.0 is fast, but maybe TOO fast – Digi.no
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PCI Express 6.0 is fast, but maybe TOO fast

The specification for PCIe 6.0 became ready in 2022, and in 2024 Nvidia’s GB100 became the first graphics processor to support the standard, which should be able to transfer a full 121 GB per second – in both directions. Now it turns out that these are speeds that can cause overheating, writes Tom’s Hardware.

Furthermore, Intel will work on a Linux driver that allows the PCIe bus to reduce the speed if it gets dangerously hot, either in the form of reducing the transfer rate per channel, or decreasing the number of channels – for example from 16 to eight, four or two .

Traditionally, each generation of the PCIe standard has been doubled in speed each time. Version 1.0 started with 4 GB/s for a 16-channel configuration (each way), while 2.0 got 8 GB/s. Version 3.0 then got 16 GB/s, while 4.0 got 32 GB/s. PCIe 5.0 is the fastest that is in relatively common use today, and has a maximum speed of 64 GB/s distributed over 16 channels.

The PCIe 7.0 standard is on track for development during 2025 and is planned to be able to support up to 256 GB/s each way, with a 16-channel link. Granted, of course, that overheating does not become an insurmountable problem.

The article is in Norwegian

Tags: PCI Express fast fast Digi .no

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