General Knoppix support for those who've read the FAQ at the Wiki
Asus H110M-C LGA 1151 DDR4 SDRAM Desktop Motherboard w/ I/O shield
$39.95
GIGABYTE GA-X99-UD4P MOTHERBOARD, M.2 SATA3, LGA2011-3, DDR4, & I/O Shield
$69.99
Asrock Z390 Phantom Gaming 4S/AC Wifi 8th/9th Gen Intel 1151 Motherboard Bulk
$40.84
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$80.71
Gigabyte Ultra Durable B550 GAMING X V2 Desktop Motherboard
$84.99
ASUS Prime Z390-A LGA 1151 Intel Z390 SATA USB 3.1 ATX Motherboard NO I/O
$99.00
ASUS PRIME H310M-C R2.0 Motherboard M-ATX Intel H310 LGA1151 DDR4 SATA3 DVI VGA
$39.95
GIGABYTE GA-Q87M-D2H Intel Q87 LGA1150 HDMI USB 3.0 mATX Motherboard Tested
$39.94
MSI PRO B650-P WiFi AMD AM5 DDR5 WiFi 6E ProSeries Motherboard
$96.01
Alienware 15 R3 17 R4 Complete Motherboard i7-7820HK GTX 1070M - PARTS
$85.00