Don’t understand how ports work now? So is everybody else. We try to figure out what is different between USB 3 and USB 4.
USB stands for Universal Serial Bus. It is the plug-and-play interface that lets a computer talk to peripherals and other devices. It is fast and easy to do. Since it was first made public in 1996, the USB has made life easier for people who use it.
But things have changed since the beginning. There is now more than one way to connect to a USB, which can be confusing. Adding USB 4.0, a new version, could help clear up some of this confusion. So, in this article, we’ve put together a list of the differences between USB 3 and USB 4, as well as the similarities and other questions that come up with them.
Differences Between USB 3 And USB 4
Before getting into the differences between both the USB types we should first understand what exactly are USB 3 and USB 4 and how they work. Then, we will look into the comparison between both.
Explaining The Use and Working Of USB 3
USB 3, or more specifically the USB 3.0 driver, is a USB standard that was made public in 2008 by the USB Implementers Forum (USB-IF). With this specification, the maximum transfer speed went from 480 Mbps to 5 Gbps, which is a huge increase.
When USB 3.1 came out in July 2013, this went up to 10 Gbps. The USB 3.1 standard called for the same kinds of connectors as the USB 3.0 standard (Micro-AB, Micro-B, Micro-A, Type B, and Type A).
After the USB 3.2 standard came out in 2017, this was no longer true. USB 3.2 doubled the maximum transfer rate to 20 Gbps and made the Type C connector the only one that could be used.
Explaining The Use And Working Of USB 4
In 2017, Intel gave USB-IF the details of the Thunderbolt protocol. In 2019, USB 4 was finally released. USB 4 is the newest standard for USB. It is focused on the Thunderbolt 3 standard. So, it works for everything from screens to storage devices to power cables.
USB 4 was a big step up from its predecessors in a number of important ways. It says that the maximum transfer rate is 40 Gbps and that DisplayPort, PCIe, and USB 3.2 can be tunneled, which lets resources be used much more efficiently. It still has some things in common with its predecessors, like using only the Type C form factor and being backward compatible.
Comparison Between USB 3 And USB 4
Each version of USB 3 was better than the ones that came before it, and the same is true for USB 4. Here are some ways in which we’ve compared the two types of USB.
Most people notice first that the types of connectors are different between USB 3 and USB 4. As was said, the USB 3.0 and 3.1 standards called for different types of connectors like Micro-B, Type A, etc. On the other hand, only Type C, also called USB Type-C or USB-C, can be used with USB 3.2 and USB 4.
USB-C calls for a 24-pin connector in the middle, with 12 B pins at the bottom and 12 A pins at the top. With two different SuperSpeed pairs on each lane, USB 4 can support up to 20 Gbps of bandwidth per lane. Also, you don’t have to worry about the right way to put the pins in because they are the same on both sides.
USB 3.0 set a maximum current of 150 mA (0.6 Watt) for low-power devices (one unit load) and a maximum current of 900 mA (4.5 Watt) for high-power devices (up to six unit loads). USB 3.0 ports could also use other USB standards, like the USB Battery Charging Specification, to increase the current available to 1.5 A. (7.5 Watt).
This is taken even further by USB 4. In the standard power range, USB 4 can handle up to 100 Watt (5 Ampere at 20 Volt). In the enhanced power range, it can handle up to 240 Watt (5 Ampere at 48 Volt), which means it can power a lot more devices.
Each new version of USB doubled the speed at which data could be sent, and USB 4 was no different. Theoretically, USB 3, USB 3.1, and USB 3.2 could support data transmission speeds of up to 5, 10, and 20 Gbps, respectively, in an ideal situation.
In the case of USB4, however, there are four different kinds that all have different speeds. USB 4 Gen 21 is used by the most basic USB 4 devices. It can go as fast as 10Gbps. The USB-IF hasn’t approved USB 4 Gen 31, so it can only go up to 20Gbps. On the other hand, USB-IF has approved USB 4 Gen 32, which has a maximum transfer rate of 40Gbps.
Even though USB 3 is still used a lot, it is clear that USB 4 will be the standard for the next few years. We’ve already talked about all the improvements USB 4 has over USB 3. This is clear to both manufacturers and users since USB 3 is being replaced by USB 4 more and more.