@Rhyalus_RSA On systems that require more power than their USB-C/TB3 docks can provide, Dell specifically recommends connecting the system's own power adapter alongside the dock. I would expect that the system would run from whichever power source offers more power, but I admittedly haven't tested connecting a high-powered dock and a low-powered barrel style connector, and of course it would make no sense at all to do that in the first place.
If you're only getting 60W to the PC through the dock, you might be using a USB-C cable that's only rated for 60W. To get more than that, you'd need a USB-C cable rated for 100W, but as of this writing, the only USB-C cables that are rated for 100W and support USB 3.x data as you'd want for a docking station connection (as opposed to a pure charging connection) are only available in lengths up to 1 meter / 3 feet. But I've run 14" Latitude 7000 Series systems designed for 65W sources from 60W sources before and I've never had a problem. If there's an impact on performance and/or battery charging, it's not noticeable to me in everyday use.
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Hey - thanks for the solid reply. Actually, the cable is ok - it is the USB hub that reports that it only puts out 60W - so there is nothing for me to change up to increase the supply.
The 7400 tech specs says that it wants 65W (and it comes with a barrel power adapter that is 65W).
I agree though, - running at 60W seems to be ok. Running it with both the PD and barrel connector seem to be ok as well.
I also assume there is some protection against additional wattage. I have been running it this way for months without any apparent ill effects.
If anyone ever comes across a Dell "official" recommendation, please let me know.
And Dear Dell Support who always posts an offer for help in these strings but never gives any - either post the answer here or please go away.
jphughan
9 Legend
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14K Posts
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March 5th, 2021 10:00
@Rhyalus_RSA On systems that require more power than their USB-C/TB3 docks can provide, Dell specifically recommends connecting the system's own power adapter alongside the dock. I would expect that the system would run from whichever power source offers more power, but I admittedly haven't tested connecting a high-powered dock and a low-powered barrel style connector, and of course it would make no sense at all to do that in the first place.
If you're only getting 60W to the PC through the dock, you might be using a USB-C cable that's only rated for 60W. To get more than that, you'd need a USB-C cable rated for 100W, but as of this writing, the only USB-C cables that are rated for 100W and support USB 3.x data as you'd want for a docking station connection (as opposed to a pure charging connection) are only available in lengths up to 1 meter / 3 feet. But I've run 14" Latitude 7000 Series systems designed for 65W sources from 60W sources before and I've never had a problem. If there's an impact on performance and/or battery charging, it's not noticeable to me in everyday use.
DELL-Cares
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March 5th, 2021 09:00
Hi,I see you’re looking for technical assistance. If you require our help, you could initiate a private/direct message with us,Please enter the Service Tag / Express Service code / Order Number in the text format for which you need assistance. and we’d be glad to assist you.
Rhyalus_RSA
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March 5th, 2021 12:00
Hey - thanks for the solid reply. Actually, the cable is ok - it is the USB hub that reports that it only puts out 60W - so there is nothing for me to change up to increase the supply.
The 7400 tech specs says that it wants 65W (and it comes with a barrel power adapter that is 65W).
I agree though, - running at 60W seems to be ok. Running it with both the PD and barrel connector seem to be ok as well.
I also assume there is some protection against additional wattage. I have been running it this way for months without any apparent ill effects.
If anyone ever comes across a Dell "official" recommendation, please let me know.
And Dear Dell Support who always posts an offer for help in these strings but never gives any - either post the answer here or please go away.
R