gzcat FILE.img.xz | dd of=/dev/da0 bs=64k && sync
hm have you tried doing a memtest? I'm not actually fantastic at networking. but im actually very good with hardware if BSD is indicating watchdog errors than the fault may actually lie with the overall system stability. The previous edition working could have simply been coincidence. Can you take this machine offline to run extended diagnostics? Are you able to get any thermal measurements from the CPU? Does SMART indicate drive failure?
I have a similar type case, except backwards.Superserver with a Atom C2758F in it, four SSD's (two SATA, one SATA-DOM and a PCI-E 4X card.Only has one fan, next to the one in the PSU, and keeps everything in normal temperature ranges.If that NIC really is getting so hot, it's the card and not the case/cooling.The NIC doesn't have a heatsink, let alone active cooling, as far as I can tell?Then it shouldn't overheat.
Good catch depnding on config hot to tough may totally be within specification. Even the power regulators for your CPU are rated far above what you can physically touch. That doesn't rule out it might be a contributing factor but if it works in another system then thats a good indication its not the issue.Can you perhaps try the card in a bench machine or another desktop system with that 90º riser card? its possible there is a damaged trace of the riser is simply faulty (fails continuity).Otherwise I would be interested in memtest results. and a bios reset. which a flash should do for you depending on board. so that we may be able to scratch off power saving/other features from interrupting the bus in an odd way.