Are you developing Rock Pi 6 with A78/A55 with G78MP24 and eGPU support,
Just to beat MediaTek Genio 1200? 
Will be available in Q3 of this year, time to jump directly Rock Pi 6 lol
Introduce ROCK 5B - ARM Desktop level SBC
PD can provide 12v but at what ampage 2.1mm/5.5mm jack is 10 amp @ 12v whilst PD is now this confusing array of differing specs and connector upgrades.
PD 1/2 can only supply 2 amps @ 12v and what devices can supply and what there actuall specs are is far from clear.
If I go on Amazon and go for a quick Amazon choice 100 watt PD then I am paying ÂŁ50.
Quick 1st grab again but 8amp 96 watt as close enough ÂŁ15
PD power is both expensive as the above is PD3.0 not 3.1 but many are 2.0 and 1.0 with much lower amperageâs as add another ÂŁ10 for a 100watt cable.
Sometimes I honestly do think PD USB is not as plain sailing as some think or that cost effective than a plain old 2.1mm/5.5mm jack âcctvâ style psuâŚ
Its a consumer grade PSU that likely may not be that great of a deal for a dedicated SBC PSU.
There seems a lot of sales speak behind PD power that I can use on any device as yes I could but it happens to be plugged in my SBC and neededâŚ
I am sort of undecided but I have tried to source for 12v PD and a splitter and thought why is this so sodding hard and expensiveâŚ
Also the cctv with the ac lead 1st -> smps -> dc lead has a much longer reach than with PD is going to be a 1 - 2m max to smps and thats it, with most brick plugs.
Again a quick grab with an ac lead but like ÂŁ79 and doesnât even have the actual charging lead!
The alternative ÂŁ15 job done does tend to make you question things and I know its going to negotiate 12v as that is all its got.
No, itâs not. Unless you are buying from Aliexpress from no-name brand.
Also, are you serious? DC barrels just horrible
and where you can find 1/2 PD? Right, even the most cheap phone charger support at least QC.
Yeah, you totally need 100W for SBC. Rock5 doesnât have power output. And itâs incredibly hard to find portable lightweight UPS for 12v. While for Type-C i have this one https://aliexpress.com/item/1005002004123046.html
Still this 
How is this connected to Rock5?
Well, Rock5 is also consumer grade product.
A lot of usefulness*
Barrel DC is truly old relic of past
1 Like
2.1mm/5.5mm jack is 10 amp @ 12v
10A requires different DC connector, the DC connector on SATA HAT supports 10A, very big.
2 Likes
Watch how many forum posts we get when powering multiple peripherals as yeah 100 watt is OTT but my example was about price and what I was saying is you can get 100watt 12v dc cctv/led type psuâs for very low prices and be absolutely sure of 12v and peak headroom.
PD your going to get such an array that no its not completely clear.
2.1mm/5.5mm is the size, Jack and all 2.1/5.5mm are approx same size as that is there size such as this these the 10amp is merely 0.5mm longer than the 5amp if that is what you mean as very big, they are bigger than current USB C (not by a lot though) and guess that is the answer.
But it does force more expensive PD style PSUâs but if that is all that will fit that is all that will fit as do like the Pico ITX format.
If I had a 10amp 2.1mm/5.5mm and 100 watt âcctvâ type psu I wouldnât need a sata hat or expensive PD psu as just the single low cost one would suffice, is what I have been thinking.
Also as the Arm board progress with the PCIe that 12v might also be used for other peripherals as well such as GPUâs⌠But I forget how tiny that Pico Itx format is really but PD is a mweh to me and extra expense for little else that what is a relatively tiny size reduction.
for PD, I do buy quite a few power supply before
Basically for PD, you can expect up to 5A
PD 1 is kinda ânon-existenceâ, or I would have bought one too⌠I want PD running on USB-A socket 
for PD 2, it should have negotiable voltage at 5V, 9V, 12V, 15V and 20V, and it is the most common PD protocol version I think. again, ânormallyâ you can use a unmarked âstraightâ USB-C cable and that would support up to 3A (also depends on cable quality), while I do see USB-C failed to negotiate higher voltage (guess it is the cable missing many pins and wires).
USB-C cable in itself is also âkinda funâ⌠you can have the worse cable like Iâs said, which cannot go pass 5V; then you can have power cable that do up to 20V@3A (or 5A if it has e-marker chip in it); then you can have power + USB âdata transferâ cable; then you can have power + USB + DP cable (maybe HDMI too, not very sure as I use DP only). I remember my Pi 4 has problem with e-marker cables, for instance; but the most annoying issue with my Pi 4 is that I cannot find a reliable way to supply 5V to its USB-C⌠voltage drops to like 4.3V, and thus making my Pi 4 running very unstable, no matter what cable I use.
Back to the PSU, there are many âcheapâ ones from China (I bought some from Taobao) ranging from 20W to 120W at reasonable prices. I remember someone from Radxa said before Rock 5 would use perhaps 60W max? That means a PD PSU that can do 20V@3A, no special cable, should be sufficient for Rock 5. 12V @5A will also be fine, but 5A means you need e-marker cables I guess. There are plenty of GaN based 65W PSU thatâ s cheap nowadays⌠I think they are around US$15 + shipping (I think I got one cheap 2-port for US$10 + S/H only).
In terms of a DC connector, would it be good if we can have a 12V at the I/O instead? Or, may we use the PoE 4-pin header to âsomehow support thatâ?
That solves the majority of my thoughts as I am thinking a constant decent amperage 12v bus is likely going to be a âthingâ.
I guess it could be the reverse and a hat that provides 5v to the GPIO but 12V at the I/O instead for me is preferable, but guess its dependent on the utilised type-c connector as how much connector dictates volts/amps.
I think with the Pi4 its use the Pi USB C PSU as its 3.0 amp and a great price as some rave about how great it is for low cost.
I think @tkaiser once said it was raspberries best product and he his a pretty good reviewer of product.
Erm, and why so? You still need HAT to convert PCIe to SATA. Just to remind you. Motherboard doesnât not supply 12v to disks. Also to remind you, NVMe and SSD doesnât require 12v.
And my example is that you donât need 100V. And you can have enough with any QC3.0 phone adapter.
No it can not. GPU requires much more than 100W. Also itâs totally canât be used with RK chip because of architectures.
No I donât.
There are many GPUs that still run on ATX PCIe 75watt (GTX 1650) and likely will always be and much work has been done with resizable BAR on ARM that GPUs on ARM might very much become a thing.
Really? And where is power sata here? Ah yes. There is none. And you still need to additional cables and external power to get it.
That is exactly why we are talking about 12v! Doh!
You or totally missing point or refuse to see it. You. CANâT. get. power sata. from. MOTHERBOARD.
Being a dual-slot card, the NVIDIA GeForce GTX 1650 SUPER draws power from 1x 6-pin power connector, with power draw rated at 100 W maximum.
And board i guess need to power up from air in this case
Lols, bless. I think you may find it could be you missing a point and why some of us are making a point for a permanent 12v rail.
TDP 75 W
Power Connectors None
Same with GTX 1050 / TI and many others because standard PCIe on a ATX mobo is 75watt without need for external power and has been always.
TDP is how much power itâs output in terms of thermal. That have connection to how much it MAY requires. But thatâs not maximum
Read it power connectors none the rest is to power a x86 cpu and all the peripherals a mobo might contain and yeah that could be 250watt and thats a guesstimate for a PC PSU and nothing to do solely with the gpu.
TDP stands for Thermal Design Power, in watts, and refers to the power consumption under the maximum theoretical load
What does it say?
Because you stuck in old age and refuse to use modern technology? Your point of cost is invalid, since you donât need 100W in Rock5 case (or any other SBC out there). Your point about this
is bullshit. 10 years ago - maybe. Now? You are kidding me. Your point about power length or
go and buy ATX powersupply and micro-ITX board with Pentium. As for length. Yeah. Totally no. PD takes that thing in account.
Surprise, surprise ARM board also requires power.
Yeah strange isnât it as with 25 watt it would sort of be perfectâŚ