Have a look at this big beautiful early 486 motherboard I saved from scrap. : r/vintagecomputing
MB-486-CONTAQ 012093 U4L2-0 Socket 3 82C596, intel 486DX-33, 8Mb Edo Ram U.S.A - Retro PC Store
DOS Days - OPTi Hybrid i386/486 Motherboard (1992) - Part 1
52G7017 IBM Ps/vp 486 Motherboard (Refurbished)
File:486 Baby AT VLB motherboard view.jpg - Wikimedia Commons
Tube Time on Twitter: "so i got this 486 motherboard, and it came with a 486DX2-66. i happen to have a couple of 486DX4-100 chips, so let's give it a little upgrade!