Log HDPLEX 500W GaN support 12V-2x6? + 525W ok?

[Arktik]

Slightly optimistic build, I know. I aim to make custom sandwich-style case with steel and aluminium.
Part List:

7950X3D
ID-Cooling Is-30a
Honeywell PC thermal pads
96GB RAM DDR5-6000 CL30
X670E-I Strix (removing heatsink buffoonery)
T700 2TB
Palit GamingPro 4080S (smoll PCB)
500W HDPLEX GaN


So, my current power budget is this:

CPU - 105W
fans+cpu cooler - 15W
RAM - 100W
MB - 30W
SSD - 10W
GPU - 265W


total - 525W

Will 525W MAX be okay for this build on the HDPLEX GaN?
Also, will using the daisy-chained PCIe connector be ok for the 12V-2x6 connector? (GPU comes with 2x8 pins to 16pin)

 

[puffdotbusiness]

I run a similar build without issues. 7800X3D/4080S. Your problem will be powering the GPU's 12vhpwr as well as that CPU from the PSU's outputs. It's possible but it might require funky custom cables.

 

[hrh_ginsterbusch]

So, my current power budget is this:

CPU - 105W
fans+cpu cooler - 15W
RAM - 100W
MB - 30W
SSD - 10W
GPU - 265W


total - 525W

Will 525W MAX be okay for this build on the HDPLEX GaN?
Also, will using the daisy-chained PCIe connector be ok for the 12V-2x6 connector? (GPU comes with 2x8 pins to 16pin)

Like, you dont run all of this simultanously. Also, synthetic benchmarks are no real life situation.

Eg. with an all-core encode, its just the CPU being challenged, and a bit of the RAM. Or with gaming, your GPU wont typically pull all the 265W (and with a bit of fine-tuning, eg. UV, it wont even need to), and your CPU will just help out when needed. But even if it would be maxed out, thats still waaay below the 500 W threshold. And so on.

And also, the HDPlex GaN 500W specifications state:

500W(600W Peak)

Which is exactly the OCP of 120% (Over-Current Protection) they state there as well. So even if your system suddenly gets instable AF, and would use the fully maximum 525W, you'd be safe.

cu, w0lf.

 

[Arktik]

I did not see the 600W peak. Thanks for your help

 

[boof]

I run a similar build without issues. 7800X3D/4080S. Your problem will be powering the GPU's 12vhpwr as well as that CPU from the PSU's outputs. It's possible but it might require funky custom cables.

I’m looking at a potential build and have the problem you’re talking about. Any more details on how you got around this?

 

[puffdotbusiness]

I’m looking at a potential build and have the problem you’re talking about. Any more details on how you got around this?

The simple solution (and what I did) is to use a J-Hack m2426 to feed power to the CPU from the GaN’s 24-pin (limited to 75W of course) and then create a custom cable to take power for the GPU’s 12vhpwr from both the GaN’s single PCIe output and single EPS output.

There is a jankier way to do what you want without a J-Hack but it involves taking cpu power from the leftover 12v and ground pins on the GaN.