Seb15
2 Bronze

WD19 without power supply

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Hallo everyone.

I need a bit of advice.

I have two laptops rigth now. One schenker xmg core 15 (for work) and an old acer v5 (private, from 2015). Both laptops do not support usb pd. I have a 3 monitor setup for remote work (laptops screen plus two FHD 1920x1080 monitors), Plus the usual usb mouse, keyboard and network cable, two times, since I'm to lazy to switch them every day twice.

I'm going to buying a new Dell XPS 15 for myself later this year, but would like to declutter my desk sooner. Since I do not have a pocking station at all, I was thinking of getting the WD19 180W.

Is this a good choise?

I would also really like to not have another power supply lieing behind my desk, as I am dealing with two power supplies already and will still have to deal with for now.

Is it possible to use the DW19 passivly? Meaning, not having it plugged into my outlet via another power supply, and it being powered by my notebooks via usb-a 3.0 (acer, maybe with a usb-c to usb-a adapter) and/or usb-c 3.1 (schenker)?

Does the WD19 180W come with its own (external) power supply?

If not, could I use the power supply of my future Dell XPS 15 with die WD19?

Many thanks in advance for your replys.


Sebastian
(I apologize for my spelling and grammer)

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jphughan
7 Gold

Re: WD19 without power supply

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@Seb15  The WD19 180W comes with a 180W power supply.  When the WD19 is using a 180W power supply, it can pass up to 130W through to the attached system.  Assuming you're looking at the current XPS 15 9500 model, it is designed for a 130W power source if you order a configuration that includes an NVIDIA GPU.  If you order a configuration that only has an Intel GPU, it is designed for a 90W power source, in which case technically you could get the WD19 130W instead, which comes with a 130W power supply and can therefore only pass 90W through to the attached system.  The reason the passthrough amount is lower is because the dock reserves some power supply capacity to run its own internal electronics and provide power to any USB peripherals you might attach.

In terms of whether the WD19 is a good choice, if you'll have an XPS 15 with an NVIDIA GPU, then the WD19 is one of your ONLY good choices because the 130W that it requires is actually above the 100W max of the official USB PD spec.  Dell did something proprietary on some of their docks and systems to stretch the spec to carry 130W over USB-C, but you won't find that implemented on other docks.  Not even all Dell docks support that.  If you use an XPS 15 that is designed for 130W from a power source that offers less than that, you will either need to accept reduced battery charging speed and performance, or else keep the system's own power supply connected as well.

The only other dock you might want to consider instead would be the WD19TB, which is a Thunderbolt 3 dock, compared to the WD19 that only uses regular USB-C.  The WD19TB only comes with a 180W power supply, and the main reason you might want to consider it would be the display setup you plan to run.  The WD19 when paired with the XPS 15 9500 can run dual displays up to 1920x1200 each or a single QHD display (or a single 4K display but only at 30 Hz rather than the standard 60 Hz).  The WD19TB can tap into 4x more video bandwidth than the regular WD19 when paired with the XPS 15, and therefore it can run dual displays up to 4K 60 Hz each or triple displays up to QHD each.

The WD19 and WD19TB cannot be used passively.  You also will not be able to use the XPS 15's own power supply with them, because the XPS 15's power supply uses a USB-C connector.  The docks use Dell's traditional 7.4 mm barrel style connector.  And again, in order to supply the amount of power the system needs, the dock itself needs a higher wattage power source in order to cover the power requirements of the dock itself.  So if your XPS 15 was designed for 130W and therefore came with a 130W power supply, even if you COULD connect that to the dock, you wouldn't be able to get 130W through to your system.

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jphughan
7 Gold

Re: WD19 without power supply

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@Seb15  The WD19 180W comes with a 180W power supply.  When the WD19 is using a 180W power supply, it can pass up to 130W through to the attached system.  Assuming you're looking at the current XPS 15 9500 model, it is designed for a 130W power source if you order a configuration that includes an NVIDIA GPU.  If you order a configuration that only has an Intel GPU, it is designed for a 90W power source, in which case technically you could get the WD19 130W instead, which comes with a 130W power supply and can therefore only pass 90W through to the attached system.  The reason the passthrough amount is lower is because the dock reserves some power supply capacity to run its own internal electronics and provide power to any USB peripherals you might attach.

In terms of whether the WD19 is a good choice, if you'll have an XPS 15 with an NVIDIA GPU, then the WD19 is one of your ONLY good choices because the 130W that it requires is actually above the 100W max of the official USB PD spec.  Dell did something proprietary on some of their docks and systems to stretch the spec to carry 130W over USB-C, but you won't find that implemented on other docks.  Not even all Dell docks support that.  If you use an XPS 15 that is designed for 130W from a power source that offers less than that, you will either need to accept reduced battery charging speed and performance, or else keep the system's own power supply connected as well.

The only other dock you might want to consider instead would be the WD19TB, which is a Thunderbolt 3 dock, compared to the WD19 that only uses regular USB-C.  The WD19TB only comes with a 180W power supply, and the main reason you might want to consider it would be the display setup you plan to run.  The WD19 when paired with the XPS 15 9500 can run dual displays up to 1920x1200 each or a single QHD display (or a single 4K display but only at 30 Hz rather than the standard 60 Hz).  The WD19TB can tap into 4x more video bandwidth than the regular WD19 when paired with the XPS 15, and therefore it can run dual displays up to 4K 60 Hz each or triple displays up to QHD each.

The WD19 and WD19TB cannot be used passively.  You also will not be able to use the XPS 15's own power supply with them, because the XPS 15's power supply uses a USB-C connector.  The docks use Dell's traditional 7.4 mm barrel style connector.  And again, in order to supply the amount of power the system needs, the dock itself needs a higher wattage power source in order to cover the power requirements of the dock itself.  So if your XPS 15 was designed for 130W and therefore came with a 130W power supply, even if you COULD connect that to the dock, you wouldn't be able to get 130W through to your system.

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Seb15
2 Bronze

Re: WD19 without power supply

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@jphughanThank you for your thorough reply.

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