OK - so Scythe sent me another set of brackets, install is now complete and working fine. So, for anybody wanting to do a motherboard swap, I can confirm that, in my case at least, everything went just fine. I did end up keeping my NC360T card and hooking up my WAN/LAN wires to the exact same ports (keeping the motherboard's NICs for future expansion or what not), but pfSense just fired up as if nothing had happened.
Two questions, though :
1. I used to see the CPU temp in the dashboard, with my AMD CPU. I don't anymore with the X3430. Is there a reason for this? Can I restore it?
2. Is there such a thing as ipmitool in pfsense? My searches seem to indicate there is, but a simple command to reset the IPMI password, which worked fine on FreeNAS (ipmitool -I open user set password 2 ADMIN, to reset to the default "ADMIN" for example) didn't work in pfSense - device not found or some such. I didn't try modifying fan parameters with ipmitool, just figured I'd ask you guys first.
Totally unrelated : anybody else seeing arpwatch as a red "X" on the dashboard ever since update to 2.2.3?
Cheers!