Sonnet eGFX Developer Edition (350) won't power on: Is it compatible with all* Thunderbolt computers, or just Macs?
(By "all" I mean properly equipped computers with 11th or 12th gen Intel processors and Thunderbolt 3 or 4: Dell, Lenovo, HP, etc. and not just Macbooks)
I picked up a Sonnet Developer Edition (350) off of eBay, and I can't get it to power on. I've tried it with a handful of simple PCIE cards (i.e. Ethernet, NVME, SATA, etc) as well as two Radeon 6600XT based cards. I've tried it with my Dell Latitude 5420 (11th gen i5 i5-1145G7) and HP G8 Zbook (12th gen i7). I also tried connecting a 650 watt power supply in place of the built-in 350 watt supply. I'm using the Thunderbolt cable that came with the unit, though I also tried two other Thunderbolt certified cables.
I will note that when I turn it on and plug it in to a computer, the fan inside the power supply starts spinning. Also, if I do a 'dmesg' command on my Dell, I can see that the kernel sees the Sonnet as a USB device. So SOME things are happening, just not ALL the things.
On Sonnet's YouTube video, someone made a comment about there being a 3-pin header with a jumper, that he switched around to get it to work. I see two 3-pin headers but no jumpers.
Should I assume this is just a DOA unit and try to get my money back from the seller? I've read that this is a common issue across the entire line, but there aren't many actual solutions.
Given you've tried other TB3 cables and tested it across multiple TB3 systems, would be inclined to agree unit is DOA and seek a replacement.