Is it possible to power the Framework Desktop from DC? Like 12 or 24V?
Maybe with one of the https://hdplex.com/ DC-ATX power supplies?
Sure, why not, as long as it supplies at least 400W of power.
for DC I think yes, this one have lot of power (500W as recommended) :
For a small passive AC there is:
The important piece of information is that the FW Desktop PSU is a standard FlexATX 400W power supply.
So I’d assume that any other FlexATX >= 400W power supply would work including those by HDPLEX.
Can’t see the price
If the question is being asked because the goal is to power it permanently by DC power that is one thing. If it is just while travelling or occasionally, it would be easier and safer to use a high quality inverter.
It would be an expensive fix if the DC power supply chosen was not manufactured or designed to the same standards as FlexATX power supplies.
For an embedded system scenario (like a portable instrument or field use in a Pelican case, etc.) supplying clean power for the different rails through an ATX would be a better long term solution unless you can find an off the shelf part that is built to the same standards at FlexATX.
The goal is to power it permanently by DC power.
I don’t understand. Are the FlexATX standards different from the ATX standards (besides the physical size)?
HDPLEX doesn’t mention FlexATX anywhere on their DC-ATX power supply pages. Do you mean it’s risky to use them to power the Framework Desktop?
The Framework Desktop specifications refer to FlexATX as the “form factor” of the power supply, suggesting that the term only defines the physical size.
Ahh pardon my leaving out some key words in that statement:
Supplying clean power for the different rails through an ATX [connector] would be a better long term solution unless you can find an off the shelf part that is built to the same standards as [a Quality ATX power supply]
The answer to your first question is FlexATX refers to the phyiscal size yes.
I saw the page on HDPLEX’s product and it is a custom size for its intended purpose and likely no the same physical dimensions as FlexATX.
The most important piece is the power supply design has incorporated many of the protections and standards that are found in quality power supplies for computers. Lower quality power supplies have traditionially damaged components many more times than their worth.
No.
No that just means their power supply is a different size and you may have problems fitting it into the Framework Desktop case. How good their power supply is (i.e. how stable the voltages are, how good the protections against short circuit are, …) is another question, but generally DC-DC is simpler than AC-DC and their products look to be good quality, purely based on the website.
Thanks.
I asked HDPLEX about the size and they told me
And their 800W DC-ATX PSU is even longer (170 mm).
Does anyone know a DC PSU that would fit?
Maybe X7-ATX-500 16V to 28V Input 500 Watts Output Long Strip DC-DC ATX Power Supply | Pico-Box. I’ve asked them about the size. They also have a 320W DC PSU. Would it work?
Where can I find the FlexATX PSU size specs?
There’s at least the PSU specs provided by Framework:
Dimensions: 150.0*81.5*40.5mm(L/W/H)
They said:
Would the ATX 2.1 power interface be a problem?
Having looked through the thread, I would ask where are you getting the DC from? My reason for asking is that if you could supply around 90-100VDC then the supplied PS would take that, it wouldn’t have to be an AC supply into it.
it look there is 2x12V separated line with 260W on each … so may be to low if we can’t combine it on the same CPU-EPS…
For the HDPLEX DC is a little longueur, but it is a full modular so may be it can fit …
160(L) x 52 (W) x 31 (H) mm vs 150(L) x 81.5(W) x 40.5(H) mm
there is place for ventilation in front…
An off-grid 24V battery system (actually 22-29V depending on the state of charge). I’m trying to avoid the loss of the inverter and maybe also reduce the loss inside the PSU.
Interesting, I had no idea that an AC-DC power supply would work with a DC input.
I’m not sure if I can find a 24V to 90-100V DC-DC converter though, or if the total loss would be significantly less than with the inverter.
I don’t see anything about combined 12V rails in their datasheets, so I guess it’s not possible. All their 12V rails seem to be limited to 240-260W.
That’s very interesting, I hadn’t seen those pictures. There is indeed quite a bit of space on the side of the PSU for the cables. The HDPLEX power supply seems to have the connectors on top, so that side space can certainly be used by the replacement power supply. A quick measurement from the picture suggests that there’s about 10mm between the PSU and the tube thing, that would be perfect!
This PSU doesn’t seem to be ATX 3.0 though, but it looks like there’s only a single 12V rails supporting 540W.
The 8 pins CPU EPS connector seems to be limited to about 300W, but the CPU seems to use 120W max according to the Framework Desktop specs page, and the GPU has a TDP of 45-120W according to Wikipedia.
So it looks like it could work.
Pico-box asked me if
the 12VHPWR connector from the FlexATX PSU is used by the Framework desktop motherboard
Does anyone know the answer?
They say:
If the 12VHPWR connector is not used, you can use our DC-ATX PSU.
the 12vhpwr connector is used on high end graphics cards (that incidentally have a tendency to melt… but that’s a separate issue) not motherboards.
looking at the official specs and photos the framework desktop uses 24 pin ATX + 8 pin EPS connectors. no 12vhpwr connector in sight
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Maybe it’s easier to just buy the MB and a case of the “right” size.
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