If that can do 50mhz and has a 1x multiplier setting, it would be a perfect platform for a DX-50. It's a later model than the boards that were originally used with the DX-50, so it should be stable at 50mhz. I would like to see how a DX-50 system stacks up in benchmarks against a DX2-66. My guess is they aren't that far apart due to the faster bus. I know the IDT Winchip 225 is faster overall then the 240 because it uses a 75mhz bus speed vs 60 for the 240. I would imagine similar results for the DX-50.

Looks like you're right nforce4max, it is a Shuttle HOT-419. Here is a link to AmoRetro.de with a pic of the board for comparison. Here is a link to an older topic here at VOGONS where retro games 100 tries out a revision 1.1 of the board. Finding a bios eprom for it will be a challenge, for sure (I simply have no idea).

If you want to know how DX-50 compares to DX2/66 just read old copies of PCMagazine and PCWorld. They're roughly equal.

I don't know if I'd waste time with 50MHz on a board like that though. Very few boards could do 50MHz properly. By properly, I mean not having to drop in all kinds of wait states to make the system stable. The SiS EISA baord I haven't isn't effective at 50MHz because a properly timed 33MHz system gives similar memory scores.

It has a DX-50 installed woot but when I study the pics for the Hot-419 I notice very small differences that confuse me, I got a damaged board that has a eprom and the same chipset but that opti is a revision A so that trick might not work at all.

Got the board going! Pulled the bios from the ruined board and gave it a go then it came up on the first try. Now it has a late award bios 🤣 so no ami craziness. Still got a lot of tweaking before it really runs right but am on the right track.