Kinda odd question here. Requires a little background to explain why I’m doing this.
My main PC is microATX, and I generally have two pci-e cards attached - gpu + 10gbit nic. I love, love, love this case. It’s all mesh, and has the PSU up front, keeping free space on the bottom to attach fans to shoot cool air directly into the gpu intake fans.
I finally pulled the trigger on a platform upgrade from AM4->AM5. Since I often do pretty large file transfers to an external SSD, I decided to go x870 (for the USB4 ports).
Unfortunately, there are no microATX x870 (or even x670) motherboards in production anywhere. So I went mini-ITX instead.
Since those boards all have just one pci-e slot, I decided to frankenstein my own 2nd internal pcie-slot with a cablecc oculink pci-e host adapter, and cannibalized one of the m.2 slots on the motherboard for use with an m.2->oculink adapter.
This setup seems to work great - I get full 10gbit ethernet speeds, and the OS is none the wiser that the card isn’t attached to a normal motherboard slot.
Well I lied a little - it works great UNTIL I HIT THE POWER BUTTON. Then, on shutdown, all hell breaks loose. Once the OS tells the motherboard to power down, it looks like the PSU is unable to (since the cablecc card has a little power switch in the on position, and shares the 24-pin PSU power via. a splitter). This inability to comply with the shutdown signal results in all the fans (CPU, chassis, and GPU) spinning like mad until I physically disconnect the PSU power cable.
The case has the PSU up front, with an extender cable on the back panel for the wall socket power cable, so I don’t even have physical access to the PSU power switch.
I’m starting to fear my only option is to put the system on its own AC splitter and just hit the red switch every time I need to shut down.
Unless the hive mind here can come up with a better solution???