nemo , search in this forum as someone did a tutorial on how to upgrade the motherboard 486SV2G into a 486SV2GX4
at the top right of yout board you see missing voltage regulators, with that and other components you can turn it into a full 486SV2GX4
I own 2 boards a 486SV2GX4 and a 486SV2G, but the components are not available where i live so my only choice is to buy them on aliexpress in order to upgrade my 486SV2G.
I also updated bios of 486SV2GX4 to latest version so it supports amd x5 133mhz, which requires a flash UV eraser and an external usb flasher.