Editor’s take: Reaching 80 Gbps of bandwidth over copper cabling is a formidable feat, however passive cables able to these speeds might be restricted to underneath 1 meter. In the meantime, the naming conference is as horrible as you’d anticipate for a USB specification, as much less technically-inclined shoppers would possibly confuse it with USB 2.0, a regular launched over twenty years in the past that tops out at 480 Mbps.
The USB Promoter Group announced the USB4 Model 2.0 specification, a major replace that can allow information charges as much as 80 Gbps over USB-C cables and connectors. For comparability, each Thunderbolt 4 and USB4 Model 1.0 solely assist a most bandwidth of 40 Gbps bidirectionally.
A brand new bodily layer (PHY) structure allows the usual’s elevated information charges, which can reportedly work utilizing present 40 Gbps USB Sort-C passive cables and newly-defined 80 Gbps USB Sort-C lively cables. The brand new specification might be backward appropriate with earlier USB revisions, together with USB4 Model 1.0, USB 3.2, and USB 2.0, in addition to Thunderbolt 3.
The brand new normal contains up to date information and show protocols to make the most of the elevated bandwidth higher. It additionally permits USB 3.2 information tunneling to exceed 20 Gbps. The most recent DisplayPort and PCIe specs are supported, which seemingly means DisplayPort 2.0 and PCIe 5.0 (PCIe 6.0 solely got here out earlier this 12 months).
The USB Promoter Group, comprised of Apple, HP, Intel, Microsoft, Renesas Electronics, STMicroelectronics, and Texas Devices, says the brand new normal ought to be revealed someday earlier than the USB DevDays developer occasions deliberate for November. So we most likely will not see units supporting the up to date specification till subsequent 12 months.
Attributable to this replace, we would begin seeing extra docks and hubs choosing USB4 as an upstream connection over Thunderbolt. With as much as twice the bandwidth of Thunderbolt 4, it ought to allow extra shows and units to be linked concurrently. It additionally allows charging speeds as much as 240W, whereas Thunderbolt is proscribed to 100W.