China launches HDMI and DisplayPort alternative — GPMI boasts up to 192 Gbps bandwidth, 480W power delivery
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PCs can use >1KW.
I don't know why you'd power a PC over DisplayPort though. New 8k monitors do go up to 190W, so we could exceed 240W if we try hard enough.
So if you have a beefy psu you should be able to power your monitor off tbe DP?
Or does carrying power limit data throughput?
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Running that much power next to a data line sounds like a terrible idea for signal integrity, especially if something shorts to said data lines. It just sounds sketchy or filled with so many asterisks that it's functional impossible to reach their claimed throughput.
See, IDK anything about data and power and cables but I dislike the vibe when I dock my laptop with that itty bitty USB-C connector that does power and 2x monitors and networking and peripherals.
I did buy the bonkers expensive proper cable from lenovo, and it does generally just work, but maybe once every few weeks I have to unplug & re-plug.
More power and more data through the same cable just seems daft.
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the GPMI cable comes in two flavors — a Type-B that seems to have a proprietary connector and a Type-C that is compatible with the USB-C standard
I actually copied this from the article to come here to the comments and have a whinge about all the different USB-C standards, and here you are explaining the reason why.
Don't get so excited. Read my comment again.
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So if you have a beefy psu you should be able to power your monitor off tbe DP?
Or does carrying power limit data throughput?
It might? I think USB uses data lanes for power delivery above some point, and I wouldn't be surprised if DP does the same.
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It might? I think USB uses data lanes for power delivery above some point, and I wouldn't be surprised if DP does the same.
Hi! I actually work at a major electrical connector company, so maybe I can shed some light on this.
I have no idea.
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Hi! I actually work at a major electrical connector company, so maybe I can shed some light on this.
I have no idea.
I used to work with electrical engineers, and whenever I asked about details, they'd shrug and say, "black magic?" Checks out.
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Gigantic 80" screens generally draw something like 120W
In HDR mode they can draw a lot more than that for short peaks
My 50" 1080p LCD draws over 200w...
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I used to work with electrical engineers, and whenever I asked about details, they'd shrug and say, "black magic?" Checks out.
Based on this pin configuration, there's only two dedicated power pins, which isn't very good for large wattages. The rest are twinax signal pairs separated by ground to reduce crosstalk.Usually when connectors are designed for power delivery, they'll use bigger contacts to reduce the contact resistance (signal contacts tend to be small so you can fit more of them in the same space). I'm guessing the original DP connector form factor wasn't made with such high power in mind, so it would make a lot of sense to use the spare signal pins for power delivery in this case. Running too much power through too few small pins can damage the contacts, by either by instant-welding the contact surfaces or by overheating the connector (see NVIDIA GPUs) ((also high voltages can cause arcing, which even in the best case will seriously degrade any connector)).
Take all of this with a huge grain of salt cause I just learned this stuff like a month ago, and my department has nothing to do with any of it. Just though someone might find it interesting.
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So if you have a beefy psu you should be able to power your monitor off tbe DP?
Or does carrying power limit data throughput?
The way it works for power over Ethernet — and I assume USB power delivery must work the same way — is that it does not reduce bandwidth because they run the power and the signal over the same wires at the same time.
There is a a power injector at one end and a filter at the other end that separate out the high-frequency signal and the DC (no-frequency) power into different wires.
This is essentially the same thing as they’re already doing for multi-frequency stacking on those same wires (and on fiber) to get the crazy bandwidth in the first place. DC power is just one more low (very very low) frequency running on the same stack.
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If it's not usb-c it's banned in EU. Because we stopped there and we won't go forward.
I think you could have a second connector in addition to a main USBC.
Honestly we need higher capacity for screen cables for PC. Both HDMI and display port are limiting performance because of their low, 40-80gbps, bandwidth. Their performance maxes out at 4k120hz with uncompressed HDR color. You can't use 8k screens or multiple 4k screens without lowering quality.
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noo we need yet another standard!
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I think you could have a second connector in addition to a main USBC.
Honestly we need higher capacity for screen cables for PC. Both HDMI and display port are limiting performance because of their low, 40-80gbps, bandwidth. Their performance maxes out at 4k120hz with uncompressed HDR color. You can't use 8k screens or multiple 4k screens without lowering quality.
Where I work, everyone has 2 4k screens.
You can use two cables to connect them, you know...And every one of them has either put their scaling up to 150% or simply set them to 2k, because you cannot read a damn thing on them.
More than 4k is a theoretical need for a veeeery small market
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Where I work, everyone has 2 4k screens.
You can use two cables to connect them, you know...And every one of them has either put their scaling up to 150% or simply set them to 2k, because you cannot read a damn thing on them.
More than 4k is a theoretical need for a veeeery small market
Graphics cards only come with one HDMI port though. The LG OLED is popular for 4k screens because it ticks all the boxes and is much cheaper than equivalent gaming monitors, but that means it doesn't support dp.
And it means that you have to upgrade the graphics card just for the cable even if it is still relatively new. The point is that we shouldn't be held back by just a cable .
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If it's not usb-c it's banned in EU. Because we stopped there and we won't go forward.
Please don't make stuff up.
Other stuff isn't banned and the law already has allowances for emerging standards.
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It's likely dc current which without the alternating magnetic fields will not degrade the signal as bad. But I whole heartedly agree with you on power delivery. What could possibly need/use that much power‽
its super nice to plug a laptop into a screen and have the cable double as a charging cable for the laptop
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PCs can use >1KW.
I don't know why you'd power a PC over DisplayPort though. New 8k monitors do go up to 190W, so we could exceed 240W if we try hard enough.
A full PC, no, but a set top box definitely yes. And a set top box is plenty of computing power for a thin client, think workstations for accountants.
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Not really that impressive since it seems to be about four times as wide as USB-C
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Imagine putting out a new high bandwidth cable standard in 2025 based on copper
SFP? You mean the every device has slots to plug in different transceiver modules? I guess that would make it more future proof, but I think that will raise the cost, and might confuse ordinary people.
You have to think about the slot-transceiver compatibility and transceiver-medium compatibility then. Hmm... but I guess that would make it more transparent what is going on than having those chips embedded inside the cables, but not sure if we can leave them out, and require the end users to take care of thinking of all these compatibilities themselves or risk fire hazards.
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If it's not usb-c it's banned in EU. Because we stopped there and we won't go forward.
In case anyone is wondering, yes, this is utter nonsense. The EU made USB-C mandatory only as a charger for portable devices like phones, tablets, headphones and mice. That's all. This new standard, unwelcome as it is, has nothing to do with charging phones so there's no reason why it can't be used in the EU.
But let's not allow measley facts get in the way of having a moan at nothing, shall we? Fucking EU. Forcing us to [checks notes] chanre all out things using a single connector, reducing e-waste, and, uh, ensuring there's lots of futureproofing built-in. BASTARDS.
