In fact, in recent months, the USB Promoter Group announced that USB4 will guarantee a doubling of the supported data transfer rate, going from 40 Gbps to 80 Gbps.
Well, with USB4 v2 the bar could be raised to reach higher peaks: users could thus reach 120 Gbps although there seems to be a "limitation".
While waiting for the USB Promotor Group to reveal the specifications of USB4 v2, the Angstronomics staff did some research, discovering that the new standard will likely add support for one-way data transfer up to 120 Gbps.
The new technology is expected to bring support for the Ultra High Bit Rate (UHBR20) DisplayPort 2.0 protocol, allowing users to connect a PC or mobile device to an 8K (144Hz) display using a USB4 v2 cable or docking station.
Except that if you send a video over a 120 Gbps connection, it will reduce the device's ability to receive data at high speed, reaching 40 Gbps.
This is because the USB Type-C connector has two pairs of high speed data links, two for sending data and two for receiving: USB4 v1 supports 20 Gbps per lane, which means that you can send and receive. up to 40 Gbps simultaneously while USB4 v2 will double that to 40 Gbps per lane, for a total of 80 Gbps of bi-directional bandwidth.
But USB also supports an asymmetrical configuration and therefore, instead of 2 transmit and 2 receive links, you can have 3 transmit and 1 receive only links: this means that instead of sending 80 Gbps in both directions, you can send 120 Gbps to a display or other device and only receive 40 Gbps.
To find out more, we just have to wait a few weeks: in the autumn, in fact, the USB Promotor Group should provide new details.
Written by Matteo with love from Italy