General Knoppix support for those who've read the FAQ at the Wiki
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
$33.39
MSI H81M-P33 Desktop Motherboard Intel MicroATX Socket LGA1150 USB 3.0 W/IO
$26.99
Motherboard AM4 A520m WIFI 4 slots Ryzen Gigabyte D3SH BEST PRICE
$50.00
ASRock B550M Pro SE AM4 DDR4 SATA 6Gb/s 1 PCIe 4.0 x16 Micro ATX Motherboard
$84.99
Asus Prime H310M-A R2.0 Intel LGA 1151 DDR4 Desktop Motherboard
$54.99
ASUS PRIME B250M-C/CSM LGA1151 6TH/7TH GEN CPU MOTHERBOARD - w I/O & i3-7100 CPU
$49.00
MSI H81I LGA1150 MINI-ITX DDR3 Desktop Motherboard With I/O Shield
$32.99
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$112.95
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$99.95