Source: CSDN
Two years ago, when Intel announced the new generation of Thunderbolt 4 (hereinafter referred to as Thunderbolt 4) interface standards, it said: "Not all USB4s can be on the same level as Thunderbolt 4."
Now it seems that the order of this sentence is in the sentence Maybe it's going to be reversed: Earlier this month, the USB promotion team officially announced USB4 v2.0, which can provide data transfer rates up to 80 Gbps (equivalent to 10GB/s) through USB Type-Ch - not only twice that of USB4 , which is twice that of Thunderbolt 4 (both have 40Gbps speeds).
(Picture from pcgamer)
Some people may not understand it. Although many devices are equipped with Type C interfaces, the interface technologies used are slightly different, such as USB4 and Thunderbolt 4.
USB4 and Thunderbolt 4 are both next-generation interface technologies, and are very similar in many aspects: if both use Type-C interfaces, they can achieve data transmission speeds up to 40Gbps, and are all built based on the underlying protocol of Thunderbolt 3... Overall, , the two are complementary and compatible.
In order to further reflect the difference between Thunderbolt 4 and USB4, Intel once conducted an official popular science in 2020:
"The "lower limit" of Thunderbolt 4 has been greatly improved - it defines strict product functions, verification testing and certification requirements, Even more demanding than Thunderbolt 3. Therefore, devices that support Thunderbolt 4 are easier to get an excellent experience.
In short, you just need to remember that Thunderbolt 4 is by far the most comprehensive interface protocol, so you can feel at ease when you see it Buy Buy Buy. And USB4 still needs to be carefully identified - not all USB4s can be on par with Thunderbolt 4. "
seems to be for the "anger" that was obviously trampled back then. The official USB4 v2.0 announced this time is not only for data transmission The rate doubles to 80 Gbps, while the USB Type-C and USB Power Delivery (USB PD) specifications will also be updated for higher levels of data performance.
Netizens are not very enthusiastic about USB4 v2.0
In fact, since USB 3.1 Gen 1 (originally called USB 3.0), basically the speed of each generation of USB has doubled: USB 3.2 Gen 1 has 5 Gb ps The transmission speed of USB 3.2 Gen 2 is 10Gbps, USB 3.2 Gen 2 × 2 is 20Gbps, USB4 v1.0 is 40Gbps, and the same is true for USB4 v2.0 today.
According to the official introduction of the USB promotion group, the updated USB4 v2.0 has the following characteristics:
is based on the new physical layer architecture, and the upcoming USB Type-C active cable will transmit data at speeds of up to 80 Gbps. At the same time, the speed increase is also applicable to existing USB-C passive cables that currently reach 40 Gbps.
updates data and display protocols to better utilize the increased available bandwidth, including: USB 3.2 devices will exceed their peak of 20 Gbps, DisplayPort and PCI Express devices may also reach higher performance peaks.
is backward compatible with USB4 v1.0, USB 3.2, USB 2.0 and Thunderbolt 3.
For the launch of USB4 v2.0, Brad Saunders, Chairman of the USB Promotion Group, is looking forward to it: "The updated USB4 specification once again follows the USB tradition, doubles data performance, thus providing a higher level of functionality to the USB Type-C ecosystem . Solutions that make the most money from this speed enhancement include higher performance displays, storage, and USB-based hubs and docking stations. "
All these specification updates are expected to be held in the USB DevDays Developer Event Series this November It was released before, and this update is currently mainly aimed at developers, and it will take some time to promote it on a wide range of scale.
Unexpectedly, unlike Brad Saunders' excitement, many netizens are not very enthusiastic about USB4 v2.0.
" It would be great if lightning energy was completely merged with USB, so we can cancel the two standards and leave only one. "
" I haven't paid attention to this kind of thing for many years. Is this data true? I can really Do you dump 50GB of data onto laptop in 5 seconds? "
" To be honest, we really don't need twice the transmission speed now. "
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