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USB-C was designed for highly-integrated mobile devices. Motherboard vendors don't want to deal with power delivery and DisplayPort, and users will be confused
by p1mrx 3y ago
USB-C was designed for highly-integrated mobile devices. Motherboard vendors don't want to deal with power delivery and DisplayPort, and users will be confused when that stuff doesn't work.
When a USB-C port is out in space, rather than flat on a desk, C-to-A adapters create a lever arm that increases the risk of damage. Though this can be solved by using adapters with ~100mm of wire in the middle.
- quickthrower2 3y agoI always found that my C to A erred on the side of letting the cable fall out. So no damage but fairly irritating.
- kevin_thibedeau 3y agoPower Delivery was an addendum to USB 2. It is specified for USB-A ports.
- barrkel 3y agoYou aren't going to get 20W of fast phone charging power out of USB 2; you get 2.5W tops. USB 3 gets you to about 5W. Meanwhile USB C goes up to 240W. You're probably never going to get that directly out of a motherboard.
- themerone 3y agoThe majority of USB C ports will never support 240W power delivery.
- gruez 3y ago>you get 2.5W tops False. USB-BC allows up to 1.5A, or 15W and doesn't require usb-c https://en.wikipedia.org/wiki/USB_hardware#USB_battery_charging https://en.wikipedia.org/wiki/USB_hardware#USB_battery_charg...
- xobs 3y agoI haven't ever seen a controller that does the BPSK modulation required for A ports. I suspect the standard was defined, but everyone just decided to do signalling over the CC pins on USB-C and ignore the USB-A standard. If you know of any controllers that implement the spec, I'm very interested in knowing part numbers! If for no other reason than as a historical curiosity.
- eternityforest 3y agoSeems like anyone who would buy anything other than a laptop would be pretty tech savvy, unless they just bought it because of familiarity and habit thinking "Desktops are what we use for home stuff, I don't wanna mess with laptops I don't know much about". I can't really think of why an average user would want one other than gaming, and PC gamers can likely figure out USB cables.
- crote 3y agoMotherboard vendors don't need to deal with PD and DisplayPort. USB-C will work just fine without them - it'll just behave like any regular old USB port.
- p1mrx 3y agoUSB-C is like a regular old USB port, with twice the data lanes (or a mux[1]) and a transistor to turn on the power when requested. In other words, it costs more. [1] https://richardg867.wordpress.com/2020/02/29/usb-c-done-cheap/ https://richardg867.wordpress.com/2020/02/29/usb-c-done-chea...
- userinanother 3y agoHence why they have so few
- Dylan16807 3y agoOn the scale of a motherboard, those things are cheap and provide more value than half the marketing bullet points.
- notatoad 3y agoRight, but if they do that then people will complain that their USB-C port isn’t working, or about how USB-C is so confusing because you never know what a port does. They’ve got a choice between doing nothing and having a few people complain, or doing a bunch of work and spending a bunch of money and still having people complain. One of those is a lot easier.
- pier25 3y agoUSBC is only a connector. It doesn't specify a protocol. On Macs, USBC ports are used for both Thunderbolt and various USB protocols.