Discussion PSU for lightweight 27 inch desktop setup

[Freeman]

My knowledge about the internals of power supplies is very limited and I didn't see a thread online or here on the forum.
I am about to travel and want an extremely lightweight desktop setup I can take with me. So I bought an HP Pavilion 27 Quantum Dot 27-inch Monitor (if you know an even lighter one around that size and a resolution with at least 2560*1440 please tell me) what I want to connect to an Intel NUC with Vega GH.
The monitor weights 3.44 kilo (I will weight it tomorrow after it arrived whithout stand) with its stand which will get replaced by a foldable tripod what will attach to the vesa mount.
Both devices have an external psu so I figuered I could lower the weight by having only one psu which will power both instead of having extra cables and an adapter to get it powered from one outlet. Is there any PSU that can do that or are there any splitters that would transform a normal psu into one with 2 outputs or is that technically just not possible at all?

I will update this thread with pictures of the complete setup when finished.

 

[chx]

The Hades Canyon ships with a 19V 230W power brick, the monitor brick is also 19V 90W.

One thing that comes to mind is https://hdplex.com/hdplex-internal-400w-ac-dc-adapter-with-active-pfc-and-19vdc-output.html I have the damnedest time trying to find the weight of it but Amazon UKclaims a 454g for the 300W. Now, how reliable is that when it's visibly just 1lbs rewritten to grams, I know not. But maybe it is light enough.

If that's the route you take, the barrel connector is the same as the old large HP so converters from that to the new small HP pin are easily available, you need an Y cable somehow. I'd ask hdplex whether they have an idea, if not then you can always convert to 5.5x2.5 https://www.ebay.ca/itm/392891677851 and Y that and then convert to one small and one large HP aka NUC.

 

[Freeman]

The Hades Canyon ships with a 19V 230W power brick, the monitor brick is also 19V 90W.

One thing that comes to mind is https://hdplex.com/hdplex-internal-400w-ac-dc-adapter-with-active-pfc-and-19vdc-output.html I have the damnedest time trying to find the weight of it but Amazon UKclaims a 454g for the 300W. Now, how reliable is that when it's visibly just 1lbs rewritten to grams, I know not. But maybe it is light enough.

If that's the route you take, the barrel connector is the same as the old large HP so converters from that to the new small HP pin are easily available, you need an Y cable somehow. I'd ask hdplex whether they have an idea, if not then you can always convert to 5.5x2.5 https://www.ebay.ca/itm/392891677851 and Y that and then convert to one small and one large HP aka NUC.

thanks for the help! you are talking about the external ac to dc brick, right? that's heavy I guess. will be around double that weight. The weight you pulled up is the internal board (DC-DC). Will still be less weight than two bricks. So that's awesome.
Anyways I got the monitor today and put it on a scale. So the weight of 3.44 kg was misplaced online. That's without stand... that's too bad. What I will do now is sending this thing back and I will exchange it with an HP 27f 4K https://store.hp.com/GermanyStore/Merch/Product.aspx?id=5ZP65AA&opt=ABB&sel=MTO . This thing should weight a little bit less without stand (no info on this online) than the Quantum Dot but will feature 4K and it has a lower power draw to: 42 Watts max and 22 Watts typical. If anyone knows a different more lightweight monitor without stand let me know!
That makes me wonder if I could not just power the thing from the nuc itself trough USB-C Power delivery. As you said the nucs PSU is rated at 230W but the nucs peak power draw is 140W. That would leave a fair amount of headroom to power the monitor. How would this be achievable, if at all?

 

[Freeman]

I guess I will need that USB-C power delivery trigger board what is mentioned here:

 

[chx]

If you want to power a HP device from a USB C charger then I strongly recommend https://shop.slimq.life/collections/cables-1/products/hp-tip-f-cable-no-c0062 . While I have not tested the HP cable I did test their Lenovo one and unlike noname Chinese adapters which I have also tested this one does have the proper resistor showing wattage.

https://www.displayspecifications.com/ has a huge database though it doesn't allow searching for weight :/

Powering the NUC from USB C is not possible but if it's 140W peak then you can use the new relatively small Lenovo 135W, it's just one pound (I see 1.03-1.05 pounds on different websites). I detailed it at
https://www.aliexpress.com/item/32950132174.html this will get you from slip tip to 5.5mm x 2.5mm (this adapter is very hard to find, I always need to look up my own older posts to find it) just pick the right "color" and from there any number of adapters will get you to large HP / NUC tip.

 

[Freeman]

If you want to power a HP device from a USB C charger then I strongly recommend https://shop.slimq.life/collections/cables-1/products/hp-tip-f-cable-no-c0062 . While I have not tested the HP cable I did test their Lenovo one and unlike noname Chinese adapters which I have also tested this one does have the proper resistor showing wattage.

https://www.displayspecifications.com/ has a huge database though it doesn't allow searching for weight :/

Powering the NUC from USB C is not possible but if it's 140W peak then you can use the new relatively small Lenovo 135W, it's just one pound (I see 1.03-1.05 pounds on different websites). I detailed it at
https://www.aliexpress.com/item/32950132174.html this will get you from slip tip to 5.5mm x 2.5mm (this adapter is very hard to find, I always need to look up my own older posts to find it) just pick the right "color" and from there any number of adapters will get you to large HP / NUC tip.

thanks for the effort. I don't know if you understood me correctly but what I wanted to do is to power the monitor from the nuc over usb-c. The nuc itself will get power by an AC-DC brick. As you pointed out there are lighter out there what I will be interested in but 135W won't be enough when I want to power the monitor what will draw the power from the nuc with that thing too. If the monitor pulls 44 watts and the nuc 140w and I might be connecting some other USB devices or have a second internal m.2 ssd I would be looking for nothing less than 190W.
So as far as powering the monitor from the nuc goes over usb-c. If I buy the cable you provided in the first link it wouldn't just work, would it?

 

[chx]

That is almost certainly not possible, does this specific NUC implement the USB C PD protocol as a provider?? That's rare as hen's teeth for anything but the chargers themselves.

The desktop Gigabyte Titan Ridge GC card implements it but it has two PCIe sin pix power inputs for 150W total...

 

[Freeman]

That is almost certainly not possible, does this specific NUC implement the USB C PD protocol as a provider?? That's rare as hen's teeth for anything but the chargers themselves.

The desktop Gigabyte Titan Ridge GC card implements it but it has two PCIe sin pix power inputs for 150W total...

yes it does, I couldn't find out how much wattage it will output but here it at least states under install the latest device drivers that it has USB - C Power Delivery. https://www.intel.com/content/www/us/en/support/articles/000030001/intel-nuc.html
I have an Gigabyte RTX 2070 itx mini running besides me - that thing also has a power delivery over USB-C (up to 27 watts I guess)

 

[chx]

never heard of such a thing let me ask around. (it's a crosspost with /r/intel )

Edit: and the results are in, https://www.intel.com/content/dam/s.../mini-pcs/nuc-kits/NUC8i7HVK_TechProdSpec.pdf says

The board supports two Thunderbolt™ 3 ports sharing up to 40Gbps of data throughput. Each port can support one 4k (60Hz) monitor output, USB3.1 (Gen 2) connection and charging capabilities up to 5V at 3A via the back panel USB Type-C connectors. Item C in figure 7 shows the location of the rear panel USB Type-C ports.

Emphasis mine. No PD.

 

[Freeman]

never heard of such a thing let me ask around. (it's a crosspost with /r/intel )

Edit: and the results are in, https://www.intel.com/content/dam/s.../mini-pcs/nuc-kits/NUC8i7HVK_TechProdSpec.pdf says



Emphasis mine. No PD.

thanks for the work. The text refers only to the thunderbolt ports on the back but not to the usb-c port in the front. Am I correct? I can't find anything written about the front usb-c port though in this PDF?!
The nuc came yesterday, 32GB Ram are already installed. Monitor was ordered yesterday.

 

[chx]

Look, you can insist, reality will insist harder.

 

[Freeman]

Look, you can insist, reality will insist harder.

you're funny. but it's true right? The text of the PDF refers to the backside of the PC. And on the "getting started with" website it states USB-C Power Delivery. Would what is mentioned in the PDF even be named USB-C Power Delivery. I mean yes it delivers power but USB-C Power Delivery is kind of a branding for Ports that can provide a lot of power... am I not just able to test it with an USB-C Trigger board?

 

[chx]

Sure you can test it with a PD meter ...

 

[Freeman]

Asked now Intel Support. They are kind of super weird in their form of answering things.

 

[Freeman]

so I got an answer back from Intel days ago, but they where still referring to the back panel, not the front usb-c port. Anyways since I want to test out other mini itx boards I need to buy a USB-C meter anyways. I read that someone powered a 30W USB-C monitor from the ITX X570 TB3 from asrock over TB3 (which is rated for only 15W) which got me thinking about the two other z490 mini itx boards with TB3.
So I found this. But as far as I am understanding this it is just a meter. Do I still need to attach a trigger to the other side or can the device trigger itself and tell me if it would be able to power a certain device. https://www.reichelt.de/usb-messger...lgGWStn9tU7yJ2EeN1StKoImRnBoCP8sQAvD_BwE&&r=1