Gaming PC

USB 4 Version 2’s Secret 120 Gbps Mode Has a Catch

When the USB Promoter Group unveiled its USB 4 version 2 specification last week, which has data transfer speeds of up to 80 Gbps, it didn’t reveal any plans to run 80 Gbps over existing cables. But apparently, there’s more to it than that. USB 4 delivers even better performance, supporting up to 120 Gbps aggregate bandwidth.

The USB Type-C connector has 4 lanes configured in a 2 Tx + 2 Rx symmetrical arrangement and operates at 20 Gbps per lane for USB 4, providing 80 Gbps bi-directional bandwidth . USB 4 version 2 increases data transfer rate per lane to 40 Gbps and aggregate bandwidth to 80 Gbps with PAM-3 encoding (both directions). Anglonomics (opens in new tab) Citing a document from Keysight, a leading manufacturer of test equipment.

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