General Knoppix support for those who've read the FAQ at the Wiki
ASRock B550M Pro SE AM4 DDR4 SATA 6Gb/s 1 PCIe 4.0 x16 Micro ATX Motherboard
$84.99
MSI H81M-P33 Desktop Motherboard Intel MicroATX Socket LGA1150 USB 3.0 W/IO
$26.99
Gigabyte GA-Q170M-D3H-GSM LGA1151 DDR4 Desktop Motherboard (No I/O Plate)
$39.99
Asrock Z390 Phantom Gaming 4S/AC Wifi 8th/9th Gen Intel 1151 Motherboard Bulk
$33.50
Asus PRIME Z370-A LGA 1151 ATX DDR4 DIMM HDMI Intel Motherboard Only | White
$74.99
Asus H81M-C Intel LGA1150 DDR3 Desktop Motherboard MicroATX Socket H3
$23.99
Asus Prime H310M-A R2.0 Intel LGA 1151 DDR4 Desktop Motherboard
$54.99
Gigabyte Z370P D3 ATX Z370 LGA1151 Motherboard (Support Intel 6/7th 8th 9th)
$59.99
GIGABYTE B760M AORUS ELITE AX Micro ATX LGA 1700 DDR5 Motherboard Only
$88.00
MSI MPG Z490 Gaming Plus LGA 1200 Motherboard FOR PARTS#141 Z33/3
$16.99