Power Supply HDPlex 500w GaN

Analogue Blacksheep

King of Cable Management
Dec 2, 2018
835
692
For future reference if you are going to use this in builds/case designs:
HDPLEX 400W HiFi DC-ATX - 160mm x 51.5mm x 26mm
HDPLEX 400W AC-DC Ver 3.0 - 180mm x 55mm x 40mm (198mm x 55mm x 40mm with Mount)
HDPLEX 200W - 170mm x 55mm x 25mm
HDPLEX 500W - 200mm x 55mm x 40mm
FlexATX - 150mm x 81.5mm x 40.5mm
TFX - 175mm x 85mm x 65mm

So if anyone has used the HDPLEX 400W AC-DC (NFC S4M, etc) you might be able to replace it with this, although you will need to factor in cables.
 

k0n

Cable-Tie Ninja
Jul 3, 2019
218
285
The length of 200mm+AC wire is a little difficult... it took me a moment to realize that it is perfect for a expansion module for my k3.93L XD



360x60x237mm (5.12L) and 750W...
 

protocolsix

Chassis Packer
Dec 24, 2022
17
8
Is there any way of using this power supply in a build with GPU with a 16-pin power connector (12VHPWR)? For example, the relatively small MSI 4070 Ti Ventus 2X.

I suppose the obvious alternative is daisy chained 250W GaN HDPlex and using one of the octopus 2x 8pin to 16 pin adapters.
 

k0n

Cable-Tie Ninja
Jul 3, 2019
218
285
I'm still blown away by how this dumb connector ever came to be... How do we transfer more power? Let's reduce the pins from 16 (2x 8Pin) to 12 and make each pin smaller! Probably the same geniuses that decided to just not use 25% of the 8Pin.

...

Not affected currently (4070 Twin Edge) but I would get a 12vhpwr cable (extension/adapter/cable for some modular psu) and cut the non 12vhpwr end of, make it the right length and put a 6 Pin on.

The 4 sense pins I would leave unused. Makes wiring easier and tells the card to not expect to much out of this connection.
 
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msystems

King of Cable Management
Apr 28, 2017
787
1,381
Is there any way of using this power supply in a build with GPU with a 16-pin power connector (12VHPWR)? For example, the relatively small MSI 4070 Ti Ventus 2X.

I suppose the obvious alternative is daisy chained 250W GaN HDPlex and using one of the octopus 2x 8pin to 16 pin adapters.
HDplex 250w do not have load balancing, so their outputs should never be paralleled into a gpu's pci cables. The sync function is simply a relay of ps_on signal to boot up the second one at the same time. They do not communicate voltage or load with each other in any way. What you could do though is use a molex pin remover and remove one of the adapter's 8-pin inputs and replace it with an 8-pin EPS housing (which has 1 less GND so have to daisy chain one of the Sense wires). Then a single 250w gan could just power the 12vhpwr
 
Last edited:

protocolsix

Chassis Packer
Dec 24, 2022
17
8
HDplex 250w do not have load balancing, so their outputs should never be paralleled into a gpu's pci cables. The sync function is simply a relay of ps_on signal to boot up the second one at the same time. They do not communicate voltage or load with each other in any way. What you could do though is use a molex pin remover and remove one of the adapter's 8-pin inputs and replace it with an 8-pin EPS housing (which has 1 less GND so have to daisy chain one of the Sense wires). Then a single 250w gan could just power the 12vhpwr
Thanks, this is helpful. I figured it would make sense to dedicate one 250W to the GPU.

In the case of a single 500W unit, I'm thinking if the CPU has only moderate power requirements (e.g. 100W), it would be possible to use two of the CPU connector pins and the SATA 12v pin for the 12VHPWR like this diagram:



My understanding is there could be a few different scenarios, but I think they should all work:
  1. The motherboard has only a 4-pin CPU EPS input. Easy: just use a 4-pin CPU power cable.
  2. The motherboard has an 8-pin CPU EPS input, but will allow just a 4-pin connector to be plugged in. Also easy.
  3. The motherboard has an 8-pin CPU EPS input, but requires an 8-pin connection. I see some 4-pin to 8-pin CPU adapter cables online which might be questionable, but I think this should probably be okay as long as the CPU doesn't require much power.
I think in this scenario, I'd be using a <37mm low profile CPU cooler so there's no way the CPU would be drawing much load.
 

msystems

King of Cable Management
Apr 28, 2017
787
1,381
The motherboard doesn't know or care how many cables are actually in use on the EPS, so all that matters is sufficient amperage is supplied for the processor. For 65w rated processors you can use the 4 pin without any issues.