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USB4 Specification Announced: Adopting Thunderbolt 3 Protocol for 40 Gbps USB
- walterbell 8y agoWill it be possible to connect a Thunderbolt 3 Macbook or Intel Ice Lake PC via USB-C cable to a USB 4.0 device and obtain 40Gbps throughput?
- wlesieutre 8y agoArticle says "The USB4 specification will be based on the Thunderbolt protocol that Intel has contributed to the USB Promoter Group. The new interface will use USB Type-C connectors and will maintain backwards compatibility with USB 2.0, USB 3.2, and Thunderbolt 3 interfaces", so bet on probably. But maybe not, they might only mean that a USB4 computer can use a TB3 device. I expect they'll continue the trend of inscrutable capability differences in USB-C ports, cables, and devices. To get the USB4 40GBps mode (effectively TB3) it's still going to be a more expensive active Thunderbolt-style cable, not a vanilla USB cable. Which means that standard markings for those cables will (hopefully?) be part of the USB4 spec. Unfortunately, knowing USB-IF the major change from the TB3 to USB4 spec will be to drop the current Thunderbolt symbol on the ports and cables and replace it with a new variation of USB-super-hyper-mega-speed symbol to make cables as confusing as possible.
- jsgo 8y agoor port color. We've used blue and red at least, guess it is time for green (in which case, confusion for the Razer Blade users).
- walterbell 8y agowe use yellow for power/charging
- wlesieutre 8y agoYellow IIRC means "provides power even when the computer is sleeping." It'd be harder to do markings like this on USB-C ports though. They don't have a big visible chunk of plastic in the middle.
- jsgo 8y agoI was being a bit facetious with the initial suggestion, honestly. Mostly poking at color being used as a universal indicator, and then you have a case like Razer where they introduce green to be complementary to their laptop's color scheme. Beyond just switching to brand + version number (ie [USB logo] 4, [thunderbolt logo] 3, etc.), I don't know of a great way to really go about this. Otherwise you end up with the super speed championship edition thing you posted, which isn't going to help anyone really. I think the color one was a great idea on their part in that you didn't have to look too close to see which port you were plugging into, but all it takes is one detractor to deviate from it (say if MSI came out with a gaming laptop with red USB2 ports), and then the whole idea is shot.
- DaiPlusPlus 8y agoApple will never use coloured ports.
- jsgo 8y agopulling my MacBook Pro out of my backpack to look, it looks like they aren't fans of iconography to say what a port is capable of either. Can't remember if my old 2013 MBP had the icons or not, but my current one for sure doesn't.
- wlesieutre 8y agoAll ports on Apple's laptops behave the same for charging - they'll continue to provide power while sleeping, but won't start providing power. If you want to use it as a battery in your backpack while it's closed you have to plug your phone in, wake the computer up, then put it back to sleep. At least that was the case last time I tested it. For the most part they don't need colors because all of the ports are the same. One recent exception was that the 2016/2017 MBPs had inconsistent Thunderbolt bandwidth because they didn't have enough PCIe lanes. IIRC left side had full 40Gbps ports but the right side had 20Gbps. The 2018 version has full speed on all four. EDIT - another potential point of confusion, they don't mark Thunderbolt ports vs USB-C ports. On any given device they're all the same, but they expect you to know that the 12"-mini-macbook is just USB-C while the Pro and Air are all Thunderbolt. So yeah, it'd be helpful to have some symbols on the laptops. They do label ports on their desktops. I assume this comes down to Ive not wanting labels on his beautiful chunk of aluminum where someone might accidentally see them while using it.
- sambroner 8y agoWow, "only starts charging while awake" really explains some confusing mornings waking up to a dead laptop.
- wlesieutre 8y agoTo clarify, I'm talking about using the laptop as a power source to charge other devices (phones, tablets, etc) off your laptop's USB ports. If you plug them in while the laptop is asleep they won't start charging. If you plug them in while the laptop is awake they'll start to charge, and they'll keep going if the computer goes to sleep later. If you laptop isn't charging itself while plugged in to the wall you have other problems.
- klodolph 8y agoProbably depends on the specs of the cable, and other factors like which port you plug into, cable length, etc. Some people are complaining about how this doesn't match expectations, which are that you get the same speed just by using the right shape of cable (and don't care about cable specs). I think that the reality is that this is really pushing the envelope, and 40 Gbit/s isn't that far from typical memory bandwidth (order of magnitude). There are only so many lanes of PCIe to go around, and you're going to end up with some ports getting more than others. We already have problems in Ethernet land with the different cat 5e / cat 6 / cat 7 cables, where bandwidth autonegotiation is mandatory. Most people just want it to work, and if you want your full bandwidth you have to pay attention to the exact specs of every device in the signal path because you can't be sloppy the way you could with 100BASE-T or even 1000BASE-T. That's a bit of a rant, but I just think that some of the problems with user experience in this area are just down to the fact that this really is a lot of bandwidth to try and push through an external cable, and you end up with the simultaneous goals of having high bandwidth, lots of ports, having all ports be the same, and not charging an arm and a leg for a laptop. Sacrificing bandwidth on a couple ports makes sense to me, in this context. Seems like the user experience pays, cause I'm not sure how I'm supposed to know which ports have bandwidth.
- sp332 8y agoArs Technica just wrote an article about the confusing names of USB versions https://arstechnica.com/gadgets/2019/02/usb-3-2-is-going-to-make-the-current-usb-branding-even-worse/ https://arstechnica.com/gadgets/2019/02/usb-3-2-is-going-to-... and now they have another one about this name. https://arstechnica.com/gadgets/2019/03/thunderbolt-3-becomes-usb4-as-intels-interconnect-goes-royalty-free https://arstechnica.com/gadgets/2019/03/thunderbolt-3-become...
- izacus 8y agoI feel like hand-wringing around that is a bit overexaggerated - at the end of the day the differences really matter for only really tiny subset of devices that need those 10GBit+ transfers and in that case you can guide yourself by the "SuperSpeed 10Gbit" "Superspeed 20Gbit" logos on the actual box. For everything else the protocols are forward and backward compatible, so you just plug in the cable and it works.
- gambiting 8y agoSo remind me, why can you walk into any apple store, pick up a new MacBook and a 5K LG monitor, and when you plug in the monitor using the USB-C cable that was bundled with the MacBook it just won't work at all? My point is - the standards might be back and forward compatible. But the cables and ports definitely aren't - and your average consumer has absolutely no way of knowing. They look absolutely identical on the outside and when they don't work it's for completely non-obvious reasons.
- bazooka_penguin 8y agoThe cables should have a ss or ss 10 or ss 20 label on them. The end devices should too I believe.
- gambiting 8y agoApple cables and ports have no logos on them whatsoever. Just plain white/silver if metal.
- chkaloon 8y agoNot USB 3.2 Gen 2x2x2?? Come on, consistency people!
- wlesieutre 8y agoIt ought to be USB 3.3 Gen 2x2x2, and USB 3.2 Gen 2x2 will be retroactively updated to USB 3.3 Gen 2x2 because everything is always the newest version of USB.
- penagwin 8y agoBest part is all USB 3 ports get to be rebranded as USB 3.3 as well.
- wlesieutre 8y agoI'm honestly surprised that they haven't rebranded USB 2 into USB 3.2 Gen 0 and USB 1 into USB 3.2 Gen -1.
- Gys 8y agoThe consistency is in being not consistent (unfortunately)
- excalibur 8y agoThey're always free to skip ahead to the next major version on a whim. But for consitency's sake it should be something like USB 4.0 Gen 4x4.
- goalieca 8y agoI’d love to ditch HDMI (even on my television!)
- cbg0 8y agoTo what avail really? You'll just be changing one cable for another. Also, HDMI 2.1 spec is 48gbps so USB4 wouldn't really be compatible with the latest HDMI version.
- anticensor 8y ago4k TV is 26.52 Gbps at 16:9 aspect ratio, 100fps.
- goalieca 8y agousb-c cable is much slimmer than HDMI (important for my cable management) and the port is much smaller so it's easier to run through the wall. It would be nice to plugin the laptop or computer i have to the TV or projector without lugging around an hdmi port. A comptuer with a handful of usb-c ports would be preferred over one with a few usb-c, and hdmi, a sound port, ...
- phkahler 8y agoI'm actually really happy with HDMI. It doesn't change much, has good compatibility and doesn't confuse a video cable for anything else. To me its universality makes it better than display port. My next PC will likely have 2 HDMI ports and that will make me very happy. Lots of USB for other stuff but the speed won't be an issue there - no need for USB 4 data rates because... who needs it?
- nintendo1889 8y agoOddly, DisplayPort had no royalties and the later revisions had chaining support. So HDMI won over the PC world but DisplayPort and DVI didn't win over the TV world, possibly due to not having DRM by default, afaik. On a tangent, I did see a ~2004 DVI projection-screen tv at a thrift shop once but I couldn't figure out how to get it to output audio. Then it hit me, it uses regular old RCA cables!
- davnicwil 8y agoAs someone who knows next to nothing about how USB actually works and just uses it, what goes into making each USB generation faster? At the physical layer, is it the materials in the cables are getting better? Or new ways of using the same materials? At the protocol layer, is it newly developed computer science theory being applied or is it just old fashioned pragmatic engineering iteration, looking at usage and making the existing protocols more efficient with tricks and shortcuts etc?
- randyrand 8y agoNope. Much simpler. Just enabling the use of the other data lanes that were already in the cable waiting to be used one day. USB-C has 4 differential twisted pair data lines.
- deleted 8y ago[deleted]
- artiscode 8y agoThat sort of explains why USB cables have been getting more expensive. More copper.
- chris_mc 8y agoProbably more like "better tolerances" or something like that. The labor/time put into a cable is the most pricey part, raw materials are probably only a few cents, even if you double the copper into it.
- gumby 8y agoand more silicon. These cables are more than just wire.
- metaphor 8y agoIt's more the process of qualifying technology that's increasingly faster with every generation than the cost of raw materials.
- 8y ago
- penagwin 8y agoHere's an idea, let's make different connector shapes depending on the cable/connector's capabilities, lets do one for connectors that support display, one for power, one for thunderbolt, that way they're easy for the average consumer to identify! Oh wait that's the issue USB was supposed to solve in the first place....
- jsgo 8y agoMy hope is that Type-C is going to be all of those things so that in the future, I only need one kind of cable (until the inevitable new plug that supplants it, but hopefully universally used as well). Currently, I have to pay attention to a USB3 Type-C cable vs a Thunderbolt 3 cable as there is a difference (I was shopping for a long TB3 cable and was unable to find one. Instead, seems the longer ones tend to be USB3 Type-C cables).
- gumby 8y agoThat's because TB has length restrictions slower USB protocols do not. Don't forget higher power PD cables (it can go up to 100 W!) should have higher gauge wires as well.
- jwr 8y agoThis is not a realistic expectation, unless you are OK with your "one cable" being 0.5m long. The "one-cable" thing is a dream, unfortunately.
- CharlesW 8y ago"Active Thunderbolt 3 cables support Thunderbolt at 40Gbps data transfer at lengths of up to 2m. Optical cables are targeted later, with lengths of up to 60m." https://blog.startech.com/post/thunderbolt-3-the-basics/ https://blog.startech.com/post/thunderbolt-3-the-basics/
- izacus 8y agoThey are, of course, significantly stupidly expensive and would cost more than many devices using USB as connecting protocol.
- MichailP 8y agoDoes this also mean that soon every computer will be making noise/radiating waves around 40GHz? Can someone with more depth in this area shine some light on this?
- MichailP 8y agoOne more question. Does this also mean that soon every computer will become software defined radio up to 40GHz?
- the8472 8y agoNo, they combine multiple lanes at a lower clock rate. Additionally, the cables are twisted pair, which among other things minimizes emission. And high-speed cables are also supposed to be shielded.
- zzzcpan 8y agoUSB cables are supposed to be shielded.
- 781 8y agoPCI Express is already working at those data rates.
- DaiPlusPlus 8y agoComputer cases are electrically insulated.
- dingaling 8y agoAs any radio amateur will tell you, PC shielding in the wild is generally poor. Plus the vast majority of PC RFI is radiated via the connected cables ( be that USB or the power cable ) or the monitor which form broad-spectrum antennas. A PC and its appendages is a horrendous radio squawk-box and should be kept away from anything RFI-sensitive. The FCC 'must not cause harmful interference' clause is pretty worthless.
- gigatexal 8y agoRoyalty free is the huge boon here.
- bubblethink 8y agoIntel said that a couple of years ago, and yet you won't find an AMD laptop/desktop that supports thunderbolt.
- zanny 8y agoOne, what AMD laptop? Two, I'd be interested to know if AMD bans board manufacturers from including TB or if they just don't do it because their heuristics say users don't care or want it. I'd imagine now with the rise of USB-C it would be the latter. Before that AMD was stuck on a 5 year old desktop platform that probably couldn't run thunderbolt ports even if board makers wanted to include it.
- fwip 8y agoA couple of newer laptops are coming with Ryzen processors. Off the top of my head, the Huawei Matebook D has an AMD option. Intel has just now opened Thunderbolt up (the topic of this article), despite the announcement coming two years ago.
- bubblethink 8y ago>Two, I'd be interested to know if AMD bans board manufacturers from including TB or if they just don't do it because their heuristics say users don't care or want it No, AMD boards already include the required TB hardware. They just can't enable it (yet) for whatever technical or legal reasons. Someone hacked them to enable it (https://www.youtube.com/watch?v=uOlQbP63lDQ https://www.youtube.com/watch?v=uOlQbP63lDQ)
- dogma1138 8y agoThere is no required hardware needed for Titan Ridge to work other than a PCIe expansion slot, you need UEFI drivers for it but that's pretty standard for anything today.
- koala_man 8y agotl;dr: Intel made Thunderbolt 3 royalty free in 2018, so now it's essentially being adopted as USB4. I had to look up what the point of 40Gbps was, and the industry evangelization site https://thunderbolttechnology.net/ https://thunderbolttechnology.net/ explains that it will allow driving one 5k display or two 4k displays, which is not possible with the 20Gbps offered by USB 3.2 or Thunderbolt 2. This also helps external GPUs, where TB2/USB3.2 is the equivalent of 2.5 PCI-e 3.0 lanes, while TB3/USB3 is 5. With that, it seems the goal is to be a viable alternative to PCI-e and HDMI, rather than just improve on today's USB3 speeds for existing device classes.
- artiscode 8y agoDoes 40Gbps mean two 4K displays daisy chained?
- lxmcneill 8y agoIn theory, yes. Since driving one 60hz 4k display at 4:4:4 chroma takes roughly 18gbps then daisy chaining 2 displays should be possible.
- monocasa 8y agoYeah. One 4k60 screen is between five and six gbps.
- nfriedly 8y agoYes, or with a hub.
- syn0byte 8y agoIt just means on the spec sheet its enough bandwidth for 2 4k streams. (HDMI 1.4 4k@60FPS == ~18Gbps)
- gumby 8y agoThunderbolt is PCIe so instead of a backplane you can use a cable. So basically anything you'd use PCIe for (drives, external GPUs etc) you can use TB for.
- nintendo1889 8y agoI am starting to see computers with USB C on the host side. The future of one single connector to rule them all will be here soon. Wait a minute, we already had that, it was usb 2.0?!?!
- mac01021 8y agoI never saw anyone hooking up a monitor via USB 2.0
- reaperducer 8y agoI've seen them for sale on Amazon and elsewhere. I always thought they'd be neat to throw in a supplemental kit bag for a second display on the go. I think some of the smaller ones were even bus powered.
- DaiPlusPlus 8y agoThose are USB 3.0-based DisplayLink connectors. Any supposed USB 2.0-based display connectors (I’ve never seen any, I’m just speculating) would have been some VNC-like contraption involving an emulated frame buffer on the host.
- nintendo1889 8y agoI've seen those usb 2.0 display adapters and I never used one but I heard that they had low refresh rates and/or low resolution, due to the 5 volt limits. I personally use a usb 2.0 NIC so that I can be packet capturing on multiple switch/vlan/ingress or egress at the same time.
- bluedino 8y agoThey weren't that great but we had them 15 years ago. VTLink. Dual monitors for laptop users, PC or Mac.
- vel0city 8y agoI've used bus-powered USB 2.0 display adapters in the past, even up to 1920x1080. They're usually a software-based renderer writing to a frame buffer on the USB device. Big updates or lots of USB traffic meant dropped/torn frames, and lots of extra CPU power used to drive it. It worked well for word processing and light web usage, but you wouldn't be watching an HD movie on it.
- alacombe 8y agoThis is a poisoned gift, there was a twitter conversation posted a couple weeks ago about the cluterf*ck that thunderbolt is... quite a scary read :-/ https://twitter.com/whitequark/status/1097777102563074048 https://twitter.com/whitequark/status/1097777102563074048
- monocasa 8y agoHonestly, most of this addresses that, by opening the spec and getting rid of royalties.
- artiscode 8y agoHonestly, I'm waiting for old USB(USB A, USB B) to be deprecated and USB C become the new universal USB. As in ATM machine, you get the drill. Current USB cable situation is a mess - my phone is USB C, but it came with a USB A to USB C cable. Good thing I can connect it to my 2017 MacbookPro using it's original USB C charging cable! However then I can't charge. Sometimes I use a USB C to female USB A dongle to use my phone's USB A male to USB C. And the whole thing has become expensive, good USB C cables seem to be made out of gold. Life would become so much easier if everything was USB C to USB C
- gumby 8y ago> good USB C cables seem to be made out of gold USB type C cables are active (they have silicon in them and handshake themselves with the host rather than simply being wire (possibly plus a resistor) as with old USB cables.) Cost will come down as volume goes up. Currently the only way to buy a cheaper cable is to buy a noncompliant and possibly dangerous one. > Life would become so much easier if everything was USB C to USB C I would agree with the added caveat of "... and if you could tell by inspection what sort of cable you have: speed, power, and protocols supported -- and some way to verify conformance"
- Dylan16807 8y agoMost of the cables aren't going to have anything more than a few-cent chip that lists the capabilities.
- gumby 8y agoThat's true; a few cents of chip and a couple of cents more complex assembly, propagated through the supply chain. (there's a little bit of handshake for PD, billboard etc but I agree with your point that the cost will be pennies). Once they become ubiquitous I imagine the usual forces will drive the cost way down so we'll end up with something like the current mix of good and crap cables. Hopefully nobody will advertise 100 W over 30 gauge wire, but probably...!
- metaphor 8y ago
- gumby 8y ago> ... it will not be exactly Thunderbolt 3 as its functionality will likely be different. I don't understand how this isn't simply ratifying/renaming current TB3-on-Type-C-connectors and this cryptic sentence in the page doesn't help. Anybody know? This isn't to say that such a renaming might not be a good idea! But it would be nice to know if my current Type C ports with TB and DB support were in fact already "USB 4.0." Also: speaking of nomenclature: notice that according to the press kit slide show, USB 3.1 Gen 2, USB 3.2 Gen 2x2, and USB4 all have the same "Alternative Branding": "Super Speed+". Madness!
- modeless 8y agoIs it an unpopular opinion that USB is already fast enough and has enough features and USB implementers should instead work on cost reduction and compatibility so that we can all move away from USB 2 and pre-type-C connectors?
- p1esk 8y agoIs it fast enough for 4K120 or 8k displays?
- izacus 8y agoUSB or the alternate modes over USB-C connector?
- p1esk 8y agoThe modes don't matter if bandwidth is not there. Ultimately, I just want every monitor and TV to support a single universal interface, fast enough for the highest resolution/refresh rate. I don't care how it's called or how it works. If "USB 4.0" can be it, great.
- StreamBright 8y agoDo we need 8K displays at all? https://www.youtube.com/watch?v=ehvz3iN8pp4 https://www.youtube.com/watch?v=ehvz3iN8pp4 https://www.youtube.com/watch?v=VxNBiAV4UnM https://www.youtube.com/watch?v=VxNBiAV4UnM
- p1esk 8y agoI haven't actually seen an 8k monitor yet, but a couple weeks ago I was at an Apple store and checked out 5k monitor. PDF text was noticeably sharper and at the same time smoother than on my 4k monitor at home. Both are relatively recent 27" IPS panels made by LG. So I don't know if I will be able to tell the difference between 5k and 8k in 27" size, but I know that 4k is not enough.
- dwringer 8y ago
- matthewmacleod 8y agoSo… maybe I'm missing the details, but is this just basically rebranding TB3 as USB4? That would make a lot of sense, if so. Edit: Ah, I missed "it will not be exactly Thunderbolt 3 as its functionality will likely be different". That's a clear as mud, then.
- cm2187 8y agoI'd be curious about 40Gbps for what cable length. TB3 is great, you can in theory dock a laptop with a single cable that will do charging, 10gbe, USB hub, etc, but with a max 50cm cable, which makes it quite "un-lappable". I'd love to do the same with a 2m cable.
- gumby 8y agoCopper thunderbolt limit is 3 m. Optical thunderbolt can go much farther (naturally) but I've never seen it in the wild -- it might even have been abandoned by now.
- cm2187 8y agoBut you can't charge a laptop with an optical cable. As for copper, I understand you don't get 40gbps with a 3m cable (though not a specialist).
- gumby 8y ago> But you can't charge a laptop with an optical cable. I don't think that matters. If you care about full PCIe through a cable you presumably are charging through a different port. > As for copper, I understand you don't get 40gbps with a 3m cable Actually you do with TB: that's the spec and you can find independent verification via a web search.
- tgsovlerkhgsel 8y agoYou can, however, charge it with a combined cable that uses copper to bring power to the laptop (and optical converter), and optics to transfer the data.
- gumby 8y agoGood idea, wonder if anyone will ever make one!
- Marsymars 8y agoCalDigit makes a 2m 100W TB3 cable. No backwards USB compatibility though, it's only Thunderbolt.
- WhitneyLand 8y agoWhat's optional? That's the most important thing to know is what's optional in the spec. That could make it great or a major pain. I'm referring to how many features the specification defines as "optional" for manufactures and that the USB organization requires for logos. This is why even USB-C is a nightmare. Consider a USB-C cable or device port. It could be charge only, data only, monitor support. There are even more permutations and sub-features. Oh, you wanted charging and found one that has it? Know how much power it enough or overkill? It could provide 15 watts, 100 watt, etc. Think you'll just google the specs page? Sure, they never miss providing any of these details or make any mistakes. Whether USB4 means one thing with nothing optional (or at least a very small number of combinations), will probably determine how much you like it or get annoyed by it. HP even made it worse with a laptop USB-C port that could technically be used for certain docking functionality but tried to fud-deny allowing it for marketing reasons.
- elagost 8y agoI very much agree with you. I've deliberately avoided USB-C for this very reason. It's not that hard - I don't buy new gear very often, and I'm still using an old 5th-gen iPod every day - but there will be a day when I don't have much of a choice anymore. Bluetooth headphones, external hard drives, game controllers, media players, phones... The worst part about USB-C is that it can be implemented so wrong it bricks your device! A Google engineer for a while was testing cables and not infrequently they worked poorly, not at all, or outright fried devices. Granted this was years ago, but now with DisplayPort and Thunberbolt 3 over the same connector, the situation has become even more vague. https://plus.google.com/+BensonLeung/posts/jGP5249NppF https://plus.google.com/+BensonLeung/posts/jGP5249NppF https://www.reddit.com/r/Nexus6P/comments/3robzo/google_spreadsheet_for_usbc_cables_with_benson/ https://www.reddit.com/r/Nexus6P/comments/3robzo/google_spre...
- cesarb 8y ago> The worst part about USB-C is that it can be implemented so wrong it bricks your device! The miswiring that bricked his device, swapping GND and VBUS, could also happen with older USB plugs. There's nothing specific to USB-C about it, USB plugs have a defined polarity for the power pins since the very first version of the standard.
- Budabellly 8y agoThis is quite meaningful for external graphics solutions, PCI peripheral devices, and other modular pc components.
- aboutruby 8y agoOfficial announcement: https://usb.org/sites/default/files/2019-03/USB_PG_USB4_DevUpdate_Announcement_FINAL_20190226.pdf https://usb.org/sites/default/files/2019-03/USB_PG_USB4_DevU...
- zapzupnz 8y agoUSB 4? You sure they don't mean USB 3.4 Revision 4 UltraSpeed HyperBus XP for Workgroups 3.11 Xtreme Edition?
- bits 8y agoWhoa. Does the addition of Thunderbolt imply that all USB4 host systems are exposed to DMA attacks[0]? Doesn't this open up every USB system (all systems?) to arbitrary, uncontrolled memory access including silently flashing new firmware/microcode to system components? 0: https://en.wikipedia.org/wiki/DMA_attack https://en.wikipedia.org/wiki/DMA_attack
- stephen_g 8y agoThat's what the IOMMU is for. USB4 being Thunderbolt could therefore be a good thing, because it will force operating system vendors to actually set that up correctly, making the hardware more secure generally. The option also exists to require approving or whitelisting devices before they are allowed to work over Thunderbolt.
- wongarsu 8y agoOn my system (Dell XPS running Windows) I have to manually approve new Thunderbolt devices and cables. The driver prompts you to accept or ignore them. I assume this is implemented to prevent DMA attacks.
- snazzycalynx 8y ago"The detailed USB4 specification will be published in the middle of 2019 and half-assed, cheap hardware that only implements a subset of the total features list in order to cut corners on cost but still use the new name should appear in 2030 behind flimsy out-of-spec connectors and loose, easily damaged cables." I had to add a few things to manage expectations and more accurately reflect reality, but I think we've got it now.
- Halluxfboy009 8y agoCan it make DP1.4 and HDMI 2.1 obsolete?
- akvadrako 8y agoYou need one of those to send video, but they could be layered over Thunderbolt / USB4.