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so did you get the switch? What is idle power consumption without anything plugged in?

still capped at 2.5, with the latest Fedora has to offer (6.7.0-0.rc0.20231106gitd2f51b3516da.9.fc40.x86_64) 07:00.0 PCI bridge: ASMedia Technology Inc. ASM2824 PCIe Gen3 Packet Switch (rev 01) (prog-if 00 [Normal decode]) LnkCap: Port #0, Speed 2.5GT/s, Width x2, ASPM L1, Exit...

More on a PCIe switch, found this thread [PATCH v9 00/14] pci: Work around ASMedia ASM2824 PCIe link training failures — Linux RDMA and InfiniBand development so there is a hope that it will work with 6.5 kernel

(I don't see point in spamming forum with extra repeatable descriptions). It doesn't make sense to me either to limit downstream link speeds/lanes but that's what lspci shows (however server spec says '10 x PCIe Gen3 x1 GPGPU cards'). Maybe there is a way to re-configure switch (it would be...

Also PCIe ASPM is also disabled and I haven't noticed an option in BIOS to enable it (lspci says that it's supported but actual state shows it as disabled).

it's how (2.5GT/s) PCIe switch board is wired in Gigabyte server (which is fine for GPU mining/AI config), SlimSAS 8i port on motherboard itself reports 8GT/s x 8 lanes. (see lspci output attached to my 1st post).

looks like ones I've seen on aliexpress for ~2 cheaper another cheaper adapter with more choice of power connectors. 4i slot is connected to 4xSATA SSD backplane in original server, so it should work.

I'd say 2.5 GTs -> 2.5 Gbit, so just barely enough for a 2.5Gbit nic. I think I saw 1 slot on switch board to have 2x lanes advertised (but I might be mistaken). Board marked with red is a power distribution pcb, PCIe switch is beneath metal plate (see attached picture). to use 8i slot for...

Instead of just the MB, I got whole Gigabyte G431-MM0 rig (figured I'd get all the cables with it and maybe convert it to NAS, it has 2.5x4 hotplug sata bays connected to SlimSAS 4i connector to start with and plenty of space to somehow mount 3.5 drives). So it looks like SlimSAS 8i port has...

here is dirty rebase of @okrasit patches, that I use with 5.17-5.18 kernels https://drive.google.com/file/d/1CHrAIIakIkAuSDMYVoMUUZsvBW7Kryqs/view?usp=sharing