Thunderbolt 3 and USB Converge With New 40 Gbps USB4 Specification
The USB Promoter Group standards body today announced the pending release of a new USB4 specification.

USB4 converges the Thunderbolt and USB protocols as part of Intel's goal to make Thunderbolt available on a royalty-free basis, which should result in wider and cheaper availability of Thunderbolt accessories like docks and eGPUs.
As USB4 is based on Thunderbolt 3, it offers data transfer speeds up to 40 Gbps, which is twice as fast as the bandwidth of the latest USB 3.2 Gen 2x2 specification. USB4's underlying Thunderbolt 3 protocol also means the specification supports up to two 4K displays or one 5K display over a single cable.
The simplest way to view USB4 is as Thunderbolt 3, but royalty free for manufacturers. Intel will continue to offer Thunderbolt 3 on a standalone basis with a few advantages over USB4, including more support with reference designs and technical issues for manufacturers, according to The Verge.
USB4 will use the USB-C connector design and will be backwards compatible with USB 3.2 and USB 2.0 specifications.
The USB4 specification is on track to be published around the middle of 2019. Over 50 companies are actively participating in the final stages of review of the draft specification, which should include Apple, Intel, and Microsoft, but it might take a few years until the first USB4 devices are released.
Popular Stories
As previously rumored, the next-generation iPhone 15 Pro and iPhone 15 Pro Max will feature a unified volume button and a mute button, according to leaked CAD images shared in a video on the Chinese version of TikTok and posted to Twitter by ShrimpApplePro.
Instead of separate buttons for volume up and volume down, the iPhone 15 Pro models are expected to have a single elongated button for...
Apple says iOS 16.4 is coming in the spring, which began this week. In his Sunday newsletter, Bloomberg's Mark Gurman said the update should be released "in the next three weeks or so," meaning a public release is likely in late March or early April.
iOS 16.4 remains in beta testing and introduces a handful of new features and changes for the iPhone. Below, we have recapped five new features ...
A first-generation iPhone still sealed inside its box sold for $54,904 at auction, which is more than $54,000 over the original $599 price tag of the device when it was released in 2007.
The original iPhone was put up for sale by RR Auction on behalf of a former Apple employee who purchased it back when it first came out. Back in February, an original, sealed iPhone sold for over $63,000,...
The iOS 16.4 update that is set to be released to the public in the near future includes voice isolation for cellular calls, according to notes that Apple shared today.
Apple says that Voice Isolation will prioritize your voice and block out the ambient noise around you, making for clearer phone calls where you can better hear the person you're chatting with and vice versa.
Voice...
While year-over-year iPhone upgrades are not always groundbreaking, new features can begin to stack up over multiple generations. For example, the iPhone 15 Pro will be a notable upgrade for those who still have a three-year-old iPhone 12 Pro.
If you are still using an iPhone 12 Pro and are considering upgrading to the iPhone 15 Pro when it launches later this year, we have put together a...
Apple's high-end iPhone models have started at $999 in the U.S. since they first launched back in 2017 with the iPhone X, but could this finally be the year that starting price sees an increase?
This week also saw some more rumors about Apple's upcoming headset and the company's explorations in the booming AI industry as well as the release of a new round of beta updates, so read on for all...
Samsung today kicked off a special "Discover Samsung" event, which will be a week-long savings event focusing on Samsung monitors, smartphones, TVs, appliances, and more. While some deals will stick around the entire week (through March 26), others will refresh every day.
Note: MacRumors is an affiliate partner with Samsung. When you click a link and make a purchase, we may receive a small...
Top Rated Comments
USB4.0 Gen 2 = USB 3.1 Gen 2
USB4.0 Gen 3 = USB 3.2 20Gbps
USB4.0 Gen 4 HyperSpeed 40 = Thunderbolt 3