PC@LIVE wrote on 2021-06-12, 22:45:

Hi, I've seen the pictures but from what I see I can't tell if it's a card that supports the Pentium MMX. The CPU appears to be […]
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Hi, I've seen the pictures but from what I see I can't tell if it's a card that supports the Pentium MMX.
The CPU appears to be a 200MMX, excluding that it is not an original, the only reason it does not go to 200 is that maybe you set the jumpers wrong.
So I would say if you can put an image of the MB, in particular I would like to see the voltage regulators mosfet area, then CPU area, then I would like to see the multiplier and FSB jumpers.
This is to understand if this MB is set correctly for the MMX, the one you had before did not support it.
If this supports it there should be no problem getting it to go to the right frequency (200).

Repo Man11 wrote on 2021-06-13, 00:02:

This information is for a slightly different Biostar VX board, but it sounds as though it would be relevant to this one, so have a look and see if your board is the same or similar enough: https://www.vobarian.com/8500tvx.html

I'm the kind of guy that does a dallas battery mod no problem or even mod an nesrgb on its own but i already lost 2 motherboards in the attempt to get an MMX working, i need to know how to precisely do this mod on my model of motherboard.

A ok then does not support the P.MMX or yes?
If it doesn't support it, you need to figure out how to make the mod to power it properly (add dual voltage).
The images I asked for were used to understand if it was a model born for normal Pentium, many i430VX can support MMX only if dual voltage is available, and from what I understand this card does not support it either.
I'll take a look at the link, but I doubt it's a simple thing to do (mod).

PC@LIVE wrote on 2021-06-13, 19:04:

A ok then does not support the P.MMX or yes? If it doesn't support it, you need to figure out how to make the mod to power it pr […]
Show full quote

A ok then does not support the P.MMX or yes?
If it doesn't support it, you need to figure out how to make the mod to power it properly (add dual voltage).
The images I asked for were used to understand if it was a model born for normal Pentium, many i430VX can support MMX only if dual voltage is available, and from what I understand this card does not support it either.
I'll take a look at the link, but I doubt it's a simple thing to do (mod).

It supports mmx perfectly, i already tested 5 games all of which give me the results of a pentium 166 mmx (like quake running at 42fps) the motherboard is compatible and set for mmx, check the first post.

iraito wrote on 2021-06-13, 19:17:

PC@LIVE wrote on 2021-06-13, 19:04:

A ok then does not support the P.MMX or yes? If it doesn't support it, you need to figure out how to make the mod to power it pr […]
Show full quote

A ok then does not support the P.MMX or yes?
If it doesn't support it, you need to figure out how to make the mod to power it properly (add dual voltage).
The images I asked for were used to understand if it was a model born for normal Pentium, many i430VX can support MMX only if dual voltage is available, and from what I understand this card does not support it either.
I'll take a look at the link, but I doubt it's a simple thing to do (mod).

It supports mmx perfectly, i already tested 5 games all of which give me the results of a pentium 166 mmx (like quake running at 42fps) the motherboard is compatible and set for mmx, check the first post.

Ok that works, but you have to understand how?
From what I understand does it work on single voltage (overvolt), or do you have the correct voltage?
To check it is simple, you can use a tester, black probe inserted in the power supply connector for HD CD-ROM in correspondence with the black wire, set to measure the Volt DC (up to 20V), measure the voltage on the said of the mosfet, one of the three (or two?) measures about 3.3V, the other should measure about 2.8V, if you don't find this voltage the cpu is overvolted, and this could create problems.
If you can make these measurements, then you will have to make attempts at various frequencies to understand if the problem is in the CPU or in the MB, of course you could do them even now but I would like to understand if the CPU has the correct voltage, and if the problem of functioning at 200MHz is due to the overvolt.

This site lists 3 different versions of this motherboard (version 1, 2, 2.1) and they have .txt files for the jumper settings for each. The version # should be somewhere on the motherboard, so make sure of which you have and double check the jumper settings. https://pcrebuilding.altervista.org/52/6/TOTA … 5%2C7+AP-C.html

Repo Man11 wrote on 2021-06-13, 19:53:

This site lists 3 different versions of this motherboard (version 1, 2, 2.1) and they have .txt files for the jumper settings for each. The version # should be somewhere on the motherboard, so make sure of which you have and double check the jumper settings. https://pcrebuilding.altervista.org/52/6/TOTA … 5%2C7+AP-C.html

I have a 2.1 and i just noticed 1 thing, jp1 and jp2 seems to act as if they are always both closed, which would explain the constant 166.

PC@LIVE wrote on 2021-06-13, 19:37:

Ok that works, but you have to understand how? From what I understand does it work on single voltage (overvolt), or do you have […]
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iraito wrote on 2021-06-13, 19:17:

PC@LIVE wrote on 2021-06-13, 19:04:

A ok then does not support the P.MMX or yes? If it doesn't support it, you need to figure out how to make the mod to power it pr […]
Show full quote

A ok then does not support the P.MMX or yes?
If it doesn't support it, you need to figure out how to make the mod to power it properly (add dual voltage).
The images I asked for were used to understand if it was a model born for normal Pentium, many i430VX can support MMX only if dual voltage is available, and from what I understand this card does not support it either.
I'll take a look at the link, but I doubt it's a simple thing to do (mod).

It supports mmx perfectly, i already tested 5 games all of which give me the results of a pentium 166 mmx (like quake running at 42fps) the motherboard is compatible and set for mmx, check the first post.

Ok that works, but you have to understand how?
From what I understand does it work on single voltage (overvolt), or do you have the correct voltage?
To check it is simple, you can use a tester, black probe inserted in the power supply connector for HD CD-ROM in correspondence with the black wire, set to measure the Volt DC (up to 20V), measure the voltage on the said of the mosfet, one of the three (or two?) measures about 3.3V, the other should measure about 2.8V, if you don't find this voltage the cpu is overvolted, and this could create problems.
If you can make these measurements, then you will have to make attempts at various frequencies to understand if the problem is in the CPU or in the MB, of course you could do them even now but I would like to understand if the CPU has the correct voltage, and if the problem of functioning at 200MHz is due to the overvolt.

It's working at 2.8 but i mean it's kind of obvious, the bios recognize the cpu as a P55C with MMX instructions and Speedsys is the same, i don't think the CPU would work as intended on an incompatible motherboard, in the past i killed a motherboard by doing just that.

iraito wrote on 2021-06-14, 20:13:

PC@LIVE wrote on 2021-06-13, 19:37:

Ok that works, but you have to understand how? From what I understand does it work on single voltage (overvolt), or do you have […]
Show full quote

iraito wrote on 2021-06-13, 19:17:

It supports mmx perfectly, i already tested 5 games all of which give me the results of a pentium 166 mmx (like quake running at 42fps) the motherboard is compatible and set for mmx, check the first post.

Ok that works, but you have to understand how?
From what I understand does it work on single voltage (overvolt), or do you have the correct voltage?
To check it is simple, you can use a tester, black probe inserted in the power supply connector for HD CD-ROM in correspondence with the black wire, set to measure the Volt DC (up to 20V), measure the voltage on the said of the mosfet, one of the three (or two?) measures about 3.3V, the other should measure about 2.8V, if you don't find this voltage the cpu is overvolted, and this could create problems.
If you can make these measurements, then you will have to make attempts at various frequencies to understand if the problem is in the CPU or in the MB, of course you could do them even now but I would like to understand if the CPU has the correct voltage, and if the problem of functioning at 200MHz is due to the overvolt.

It's working at 2.8 but i mean it's kind of obvious, the bios recognize the cpu as a P55C with MMX instructions and Speedsys is the same, i don't think the CPU would work as intended on an incompatible motherboard, in the past i killed a motherboard by doing just that.

Yes, I understand that it works on that motherboard. But I was asking you to check if the CPU voltage was correct, because those CPUs still work if overvolted, indeed they often overvolt to increase frequency and obtain stability.
But to check if the voltage is right, don't rely on the BIOS (because it recognizes it), you should do the mosfet heatsink check, if you can't do that check you won't actually know if the voltage is correct.
You can search if you are unsure how to do this:
measuring vcore multimeter

Repo Man11 wrote on 2021-06-13, 00:02:

This information is for a slightly different Biostar VX board, but it sounds as though it would be relevant to this one, so have a look and see if your board is the same or similar enough: https://www.vobarian.com/8500tvx.html

Well, this solved my issues, it was the multiplier, now it runs at 200 with no issues whatsoever.

iraito wrote on 2021-06-16, 15:20:

Repo Man11 wrote on 2021-06-13, 00:02:

This information is for a slightly different Biostar VX board, but it sounds as though it would be relevant to this one, so have a look and see if your board is the same or similar enough: https://www.vobarian.com/8500tvx.html

Well, this solved my issues, it was the multiplier, now it runs at 200 with no issues whatsoever.

Cool.