So if you rely on the automatic voltage recognition, it could be possible that it starts with a lower voltage, when with the P.MMX it starts at 125 MHz, this is normal, but if you switch to the jumpers manually, if you select for example 2.9V , you must have about 2.9V (+ or - 0.1V), does this tell you if it works or is there a problem?
Since the voltage becomes lower, according to what you have measured, if this is indeed the case, you could try the P.MMX at 200 MHz, and instead of 2.8V you can select 2.9V or even 3.2V, but I advise you to try the 2.9V, check the VCORE voltage, if it is low it should also be low at 3.2V, but pay attention to the temperatures, the ideal would be a k6 233, that has 3.2V from the factory, and can also work at 2.9V (perhaps not very stable).

PC@LIVE wrote on 2024-01-11, 20:20:

So if you rely on the automatic voltage recognition, it could be possible that it starts with a lower voltage, when with the P.MMX it starts at 125 MHz, this is normal, but if you switch to the jumpers manually, if you select for example 2.9V , you must have about 2.9V (+ or - 0.1V), does this tell you if it works or is there a problem?
Since the voltage becomes lower, according to what you have measured, if this is indeed the case, you could try the P.MMX at 200 MHz, and instead of 2.8V you can select 2.9V or even 3.2V, but I advise you to try the 2.9V, check the VCORE voltage, if it is low it should also be low at 3.2V, but pay attention to the temperatures, the ideal would be a k6 233, that has 3.2V from the factory, and can also work at 2.9V (perhaps not very stable).

As I've written at the latest message. Manual setting gives 0.7V below what it should be.I've set 3.2V and it gives 2.6V and Pentium MMX works.

But When I set 2.9V for K6-2-333(it needs 2.2V), board gives 1.3V approx. And whatever voltage I set manually it gives 1.3.

fsinan wrote on 2024-01-14, 10:43:

PC@LIVE wrote on 2024-01-11, 20:20:

So if you rely on the automatic voltage recognition, it could be possible that it starts with a lower voltage, when with the P.MMX it starts at 125 MHz, this is normal, but if you switch to the jumpers manually, if you select for example 2.9V , you must have about 2.9V (+ or - 0.1V), does this tell you if it works or is there a problem?
Since the voltage becomes lower, according to what you have measured, if this is indeed the case, you could try the P.MMX at 200 MHz, and instead of 2.8V you can select 2.9V or even 3.2V, but I advise you to try the 2.9V, check the VCORE voltage, if it is low it should also be low at 3.2V, but pay attention to the temperatures, the ideal would be a k6 233, that has 3.2V from the factory, and can also work at 2.9V (perhaps not very stable).

As I've written at the latest message. Manual setting gives 0.7V below what it should be.I've set 3.2V and it gives 2.6V and Pentium MMX works.

But When I set 2.9V for K6-2-333(it needs 2.2V), board gives 1.3V approx. And whatever voltage I set manually it gives 1.3.

Surely there is something wrong, in your last message the problem is clearer, but before putting your hands to the soldering iron and disconnecting something, there is one last test to do, if you go back to automatic recognition, enter the BIOS and check the VCORE, if it is for example 2.8V (in reality it would be less), can you try changing this value from BIOS?
It would be an attempt at a slight overvolt, if for example you put 3.2V check the real value (measured with the tester on VCC), then also check on the inductor next to it, they must be the same.

At auto bios voltage setting can not be changed. Fixed at 2.8V but giving out 2.2V.

Changed all 4 capacitors around the cpu but it didnt change anything.

Flashed 2.0, 2.3 and 2.6 no change.

There is smething wrong but I can not find.

fsinan wrote on 2024-01-27, 20:03:

At auto bios voltage setting can not be changed. Fixed at 2.8V but giving out 2.2V. […]
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At auto bios voltage setting can not be changed. Fixed at 2.8V but giving out 2.2V.

Changed all 4 capacitors around the cpu but it didnt change anything.

Flashed 2.0, 2.3 and 2.6 no change.

There is smething wrong but I can not find.

Well if changing the capacitors didn't change anything, the problem of low voltage still remains, I honestly don't know how that circuit is made, and even knowing it, I couldn't understand if it works normally, the ideal would be to have a similar motherboard for compare the voltages.
At this point what to do?
But one check I would do is measure the 3.3 5 and 12V lines, exactly how much do you measure?
If you find a big difference, it would explain why you measure low VCore voltages.