486 dx2 socket, also says 486DX on the bios chip, not sure about the make/model, fit a cpu and see if it posts, it should give you some info on screen.

Something from Pine technology zoo

https://theretroweb.com/motherboards/s/pine-t … hnology-pt-426v

https://theretroweb.com/motherboards/s/jpn-co … mb-486-dx-33-um

Thanks for the replies, seems odd that there a location that looks like it was for a socket but there’s nothing there and it says 486SX whereas the socket itself says 80487SX.

radiokid wrote on 2024-04-22, 16:29:

Thanks for the replies, seems odd that there a location that looks like it was for a socket but there’s nothing there and it says 486SX whereas the socket itself says 80487SX.

It's for variants of the board that come with a 486SX soldered in that empty location which you can later upgrade by installing a 487 in the socket, which is just a 486DX that disables the soldered CPU and takes over. Intel just made the upgrade process needlessly convoluted.

In your case, since there is no soldered CPU, it just acts as a regular 486 socket.

TheMobRules wrote on 2024-04-22, 16:49:

radiokid wrote on 2024-04-22, 16:29:

Thanks for the replies, seems odd that there a location that looks like it was for a socket but there’s nothing there and it says 486SX whereas the socket itself says 80487SX.

It's for variants of the board that come with a 486SX soldered in that empty location which you can later upgrade by installing a 487 in the socket, which is just a 486DX that disables the soldered CPU and takes over. Intel just made the upgrade process needlessly convoluted.

In your case, since there is no soldered CPU, it just acts as a regular 486 socket.

Yeap! 100%

TheMobRules wrote on 2024-04-22, 16:49:

radiokid wrote on 2024-04-22, 16:29:

Thanks for the replies, seems odd that there a location that looks like it was for a socket but there’s nothing there and it says 486SX whereas the socket itself says 80487SX.

It's for variants of the board that come with a 486SX soldered in that empty location which you can later upgrade by installing a 487 in the socket, which is just a 486DX that disables the soldered CPU and takes over. Intel just made the upgrade process needlessly convoluted.

In your case, since there is no soldered CPU, it just acts as a regular 486 socket.

You are a star, thanks so much for the explanation!

486DX with 33MHz bus and 5v voltage only