| ▲ | sofixa 12 hours ago |
| Not really comparable. With Intel's confusing socket naming, you can buy a CPU that doesn't fit the socket. With USB, the physical connection is very clearly the first part of the name. You cannot get it wrong. Yeah, the names aren't the most logical or consistent, but USB C or A or Micro USB all mean specific things and are clearly visibly different. The worst possible scenario is that the data/power standard supported by the physical connection isn't optimal. But it will always work. |
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| ▲ | GuB-42 22 minutes ago | parent | next [-] |
| It will always work if you want 500 mA at 5V and if 480 Mbps is sufficient (assuming everything is USB2 compatible nowadays). But sometimes the extra power or extra data transfer is not an option. For charging a laptop for instance, you typically need 20V, if your charger doesn't support that, you can't charge at all. And then there is Thunderbolt, DisplayPort, Oculink, where the devices that use these features won't work at all in an incompatible port. And I am not aware of device that strictly requires one of the many flavors of USB 3 or 4, but I can imagine a video capture card needing that. Raw video requires a lot of bandwidth. |
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| ▲ | Arrowmaster 11 hours ago | parent | prev | next [-] |
| I don't think the port names is what they were referring to. The actual names for each data transfer level are an absolute mess. 1.x has Low Speed and Full Speed
2.0 added High Speed
3.0 is SuperSpeed (yes no space this time)
3.1 renamed 3.0 to 3.1 Gen 1 and added SuperSpeedPlus
3.2 bumped the 3.1 version numbers again and renamed all the SuperSpeeds to SuperSpeed USB xxGbps
And finally they renamed them again removing the SuperSpeed and making them just USB xxGbps USB-IF are the prime examples of "don't let engineers name things, they can't" |
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| ▲ | zx8080 10 hours ago | parent | next [-] | | > USB-IF are the prime examples of "don't let engineers name things, they can't" While not disagreeing, I'd ask for a proof it's not a marketing department's fun. Just to be sure. Engineers love consistency. Marketing is on the opposite side of this spectra. | |
| ▲ | PunchyHamster 8 hours ago | parent | prev [-] | | > USB-IF are the prime examples of "don't let engineers name things, they can't" Engineers don't make names that are nice for marketing team. But they absolutely do make consistent ones. The engineer wouldn't name it superspeed, the engineer would encode the speed in the name |
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| ▲ | numpad0 3 hours ago | parent | prev | next [-] |
| Users aren't supposed to be (choosing && swapping) CPUs by themselves between these identical sockets(LGA2011 v0 through v3). These are supposed to be bought in trays and kitted in a shop. So reusing same parts for cost saving should not cause issues. Consumer oriented sockets(LGA115x) has different notches and pin counts to prevent this issue - actually, some of "different" sockets in consumer oriented sockets with "different" chipsets are actually identical, and sometimes you see Chinese bastardized boards that use discarded server-marked chips and pins-fudged hacker builds online that should not be possible according to marketing materials, so there is their own rabbit hole there. |
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| ▲ | halapro 10 hours ago | parent | prev | next [-] |
| > But it will always work Not at all. If you want to charge your phone, it might "always work", but if you want to use your monitor with USB hub and pass power to your MacBook, you're gonna have a hard time. |
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| ▲ | nativeit 9 hours ago | parent [-] | | Look for the USB hub that costs several times more than the rest, and that’s the correct one for your use case. | | |
| ▲ | halapro 5 hours ago | parent [-] | | You're missing the point. Of course "the most expensive one" will cover it, but price alone should not be a differentiator. |
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| ▲ | dataflow 11 hours ago | parent | prev | next [-] |
| > The worst possible scenario is that the data/power standard supported by the physical connection isn't optimal. But it will always work. I don't know what "always work" means here but I feel like I've had USB cables that transmit zero data because they're only for power, as well as ones that don't charge the device at all when the device expects more power than it can provide. The only thing I haven't seen is cables that transmit zero data on some devices but nonzero data on others. |
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| ▲ | dtech 10 hours ago | parent [-] | | I don't think those cables are in spec, and there are a lot of faulty devices and chargers that don't conform to the spec creating these kinds of problem (e.g. Nintendo Switch 1). This is especially a problem with USB C. You can maybe blame USB consortium for creating a hard spec, but usually it's just people saving $0.0001 on the BOM by omitting a resistor. |
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| ▲ | nottorp 10 hours ago | parent | prev | next [-] |
| > the data/power standard supported by the physical connection isn't optimal How polite. It can be useless, not "not optimal". Especially since usb-c can burn you on a combination of power and speed, not only speed. |
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| ▲ | LoganDark 11 hours ago | parent | prev [-] |
| > But it will always work. I can't find a USB-C PD adapter for a laptop that uses less than 100W. As a result, I can't charge a 65W laptop from a 65W port because the adapter doesn't even work unless the port is at least 100W. It does not always work. |
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| ▲ | zx8080 10 hours ago | parent | next [-] | | I've noticed that GAN PD's 100w and 65w adapters output is actually less (both do not charge my laptop) than lenovo 65w charger (the one with a non-detachable usbc cable). Cable does not matter, tried with many of them including ones providing power from other chargers. It seems totally random, and you cannot rely on watts anymore. | | |
| ▲ | malfist 10 hours ago | parent | next [-] | | There's a fair number of misleading our outright wrong specs if your buying from amazon or the like. And even if you're buying brand name, the specs can be misleading. They often refer to the maximum output of all the ports, not the maximum output of a port. So a 100 watt GAN charger might be able to deliver only 65 watts from it's main "laptop" port, but it has two other ports that can do 25 and 10 watts each. Still 100 watts in total, but your laptop will never get it's 100 watts. Not every brand is as transparent about this, sometimes it's only visible in product marketing images instead of real specs. Real shady. | |
| ▲ | SEMW 7 hours ago | parent | prev | next [-] | | > Cable does not matter, tried with many of them including ones providing power from other chargers. That might not necessarily be the right conclusion. My understanding is: almost all USB-C power cables you will enounter day to day support a max current of at most 3A (the most that a cable can signal support for without an emarker). That means that, technically, the highest power USB-PD profile they support is 60W (3A at 20V), and the charger should detect that and not offer the 65W profile, which requires 3.25A. Maybe some chargers ignore that and offer it anyway, since 3.25A isn't that much more than 3A. For ones that don't and degrade to offering 60W, if a laptop strictly wants 65W, it won't charge off of them. So it's worth acquiring a cable that specifically supports 5A to try, which is needed for every profile above 60W (and such a cable should support all profiles up to the 240W one, which is 5A*48V). (I might be mistaken about some of that, it's just what I cobbled together while trying to figure out what chargers work with my extremely-picky-about-power lenovo x1e) | |
| ▲ | unsnap_biceps 10 hours ago | parent | prev [-] | | I have a dell laptop that uses a usbc port to charge, but doesn't actually use the PD specification, but a custom one, so my 65w GAN charger falls back to 5v 0.5a and isn't useful at all. I'd bet dollars to donuts that your Lenovo is doing similar shit. | | |
| ▲ | zx8080 8 hours ago | parent [-] | | No. It can charge from my monitor PD just fine. And wow, I'll keep away from Dell, thanks. |
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| ▲ | seszett 11 hours ago | parent | prev [-] | | For this specific issue I'm surprised, I have used all kinds of USB PD chargers for my laptops and all of them but one are less than 100W, with no problem at all. The ones I use most are 20W and 40W, just stuff I ordered from AliExpress (Baseus brand I think). |
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