Riverbed CX-770, seller accepted my BO of $60 for QTY 2.
No PSU is included but you can find them for around $17 with free shipping (FSP084-DIBAN2 or similar, 12V 7A 5.5x2.5mm center positive)
tl;dr
Here's my write up of the CX-255, which is the same Advantech NAMB-3250MB motherboard but with a lower-spec CPU (Celeron 725C), only 2 DIMM slots, and 3 fewer Ethernet interfaces: Riverbed SteelHead CX 255 | «WatchMySys» Blog
Photo of the NAMB-3250MB from the CX-255:
No PSU is included but you can find them for around $17 with free shipping (FSP084-DIBAN2 or similar, 12V 7A 5.5x2.5mm center positive)
tl;dr
- Xeon E3-1125C v2 (4C/8T Ivy Bridge, 40W TDP), you can easily install OpenWrt x86 or pfSense/OPNsense (BIOS isn't locked down either, supports UEFI/CSM boot), even Windows installs
- 6 GigE interfaces, all Intel (2x i210, 4x from DH89xxCC southbridge)
- Internal PCIe x8 slot (might be only x4 width, but works with a GPU on an extender)
- 4 DDR3 slots (PC3-12800E)
- Cisco rollover cable compatible console port, 115200n8 with BIOS serial redirection
- Idle power consumption should be in the neighbourhood of ~20W (CX-255)
- 40mm fans are noisy but not screamers
Here's my write up of the CX-255, which is the same Advantech NAMB-3250MB motherboard but with a lower-spec CPU (Celeron 725C), only 2 DIMM slots, and 3 fewer Ethernet interfaces: Riverbed SteelHead CX 255 | «WatchMySys» Blog
Photo of the NAMB-3250MB from the CX-255: