General Knoppix support for those who've read the FAQ at the Wiki
Gigabyte AMD B550 UD AC Gaming Motherboard - AMD B550 Chipset - AM4 Socket - AMD
$79.99
ASUS H110M-R Motherboard Intel 6th/7th Gen LGA1151 DDR4 Micro-ATX i/o shield
$42.00
Gigabyte Z370P D3 ATX Z370 LGA1151 Motherboard (Support Intel 6/7th 8th 9th)
$59.99
[REFUR] MSI B450M-A PRO MAX AM4 AMD B450 SATAIII USB3.2 Micro-ATX Motherboard
$55.99
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$96.01
MSI A320M-A PRO AM4 AMD A320 USB3.2 Gen1 Micro-ATX Motherboard
$52.99
Asrock Z390 Phantom Gaming 4S/AC Wifi 8th/9th Gen Intel 1151 Motherboard Bulk
$43.27
ASUS Prime Z390-A LGA 1151 Intel Z390 SATA USB 3.1 ATX Motherboard NO I/O
$99.00
MSI PRO B650M-P AM5 Ryzen 7000 DDR5 SATA 6G 2x M.2 7.1 Audio mATX Motherboard
$94.99
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$80.71