That is 6x86L using 2.8volts. You need regular 6x86 for that board since it almost certainly won't support 2.8v since it uses FX chipset. Those usually need the voltage module for that. But if your board supports dual voltage, make sure the voltage jumpers are correct.

aitotat wrote on 2023-11-30, 18:49:

That is 6x86L using 2.8volts. You need regular 6x86 for that board since it almost certainly won't support 2.8v since it uses FX chipset. Those usually need the voltage module for that. But if your board supports dual voltage, make sure the voltage jumpers are correct.

According to this I should have J1 as Pins 2 & 5 closed and J12 Pins 2 & 4 closed, But here is the problem. On my board I have shorted jumpers 1 & 3 with soldered wired. So I can change J1 but not J12.
Should I dare to desolder that wire and short the other 2 pins?

My guess is that your board revision doesn't have necessary VRM for other than 3,3V. That is why there is no jumper but soldered wire.

aitotat wrote on 2023-11-30, 19:33:

My guess is that your board revision doesn't have necessary VRM for other than 3,3V. That is why there is no jumper but soldered wire.

What would happen if I solder the wire on 2nd position? According to the manual, those should be 2.8V.

Can I burn the board this way?

Cyrix chips use more electricity than Intel, occasionally the 166+ would be borderline on early boards overloading the vrm.

Also Using straight 3.3v could fry the 2.8v chip

There is also a compatibility issue with the 2x multiplier on early boards in that 2x was physically wired wrong for socket 7 chips

rmay635703 wrote on 2023-11-30, 20:35:

Cyrix chips use more electricity than Intel, occasionally the 166+ would be borderline on early boards overloading the vrm.

Also Using straight 3.3v could fry the 2.8v chip

There is also a compatibility issue with the 2x multiplier on early boards in that 2x was physically wired wrong for socket 7 chips

I already tried 3.3V with this cyrix, but as it still beeps, I hope it is still alive.

What if I wire this other pins that should be 2.8V? Can I fry the board?

Actually shorting the other pins made my Cyrix to boot 😀
Turned it on just for short, now I need to test for stability.

boby wrote on 2023-12-01, 12:53:

Actually shorting the other pins made my Cyrix to boot 😀
Turned it on just for short, now I need to test for stability.

which pins did you short to get it work???

MyJules wrote on 2024-03-28, 14:29:

boby wrote on 2023-12-01, 12:53:

Actually shorting the other pins made my Cyrix to boot 😀
Turned it on just for short, now I need to test for stability.

which pins did you short to get it work???

There were 2 pins shorted with wire and 2 other empty pins, next to it. Not really the pins, more like holes in the board.
I removed the wire, and put it to the other 2 pins.

IMPORTANT: my pins layout might be different from yours. For my board I found that those pins are suposed to have different voltage then the shorted ones, so I give it a try.
Unless you have the same board, you should be careful.

Hope this helps

thx 😀