Some utilities here that you could try:

List of Slowdown Utilities (Beta)

But I think, in general, PII and PIII are not very suited to be slowed down. At least not in a very granular manner. First Gen PII at least had unlocked multiplier though which helped. My Pentium II 300Mhz can go down to 133Mhz I think.

There are very few options as P6-based CPUs aren't flexible.

Does your motherboard have SoftMenu-like features in the BIOS settings? That will allow you to change the FSB speed. Related to this, some utilities such RayerR's SMB (DOS) and SoftFSB (Windows) will let you do the same on the fly provided that the PLL clock generator chip on the motherboard is supported, especially the former.

A very less known method is setting the CPU cache mode to write-through with CM but it only works in real mode or if JEMM is loaded.

Lastly, there is also the hardware-based Throttle Blaster. Similar to ACPI throttling but very granular.

RetroPCCupboard wrote on 2024-12-21, 21:01:

Some utilities here that you could try:

List of Slowdown Utilities (Beta)

But I think, in general, PII and PIII are not very suited to be slowed down. At least not in a very granular manner. First Gen PII at least had unlocked multiplier though which helped. My Pentium II 300Mhz can go down to 133Mhz I think.

I see. keep in mind that last time i played that game on a real life rig was right when it came out in 1995, and i had a pentium 75, that cpu ran the game fine.

so which one of those is suited for a p3, for as slow as it can go?

Although i know it may sound stupid, i wanted to build a rig that had the best of both world, early win 95 games and late win 98 games, by having both a 3dfx + an s3 for old games AND an ATI radeon for late 90's games, (that i switch from bios according to what i need to play on boot). but for cpu seems like there is no solution ? 🙁

Gmlb256 wrote on 2024-12-21, 21:18:

There are very few options as P6-based CPUs aren't flexible. […]
Show full quote

There are very few options as P6-based CPUs aren't flexible.

Does your motherboard have SoftMenu-like features in the BIOS settings? That will allow you to change the FSB speed. Related to this, some utilities such RayerR's SMB (DOS) and SoftFSB (Windows) will let you do the same on the fly provided that the PLL clock generator chip on the motherboard is supported, especially the former.

A very less known method is setting the CPU cache mode to write-through with CM but it only works in real mode or if JEMM is loaded.

Lastly, there is also the hardware-based Throttle Blaster. Similar to ACPI throttling but very granular.

I think it has , where i can check specifically, as this bios has a ton more of options than usual bios? from the bios for example i choose wteher i want to use the AGP ati card for more "modern" games or use the s3 for old games.

"Lastly, there is also the hardware-based Throttle Blaster. Similar to ACPI throttling but very granular."

this one seems very good actually. does it need soldering of any kind or is let's say "plug and play"? I am crap with soldering unless is very basic stuff. My father could do that but his eyesight doesn't allow him to do very small solderings anymore

Zaxxon wrote on 2024-12-22, 09:00:

I think it has , where i can check specifically, as this bios has a ton more of options than usual bios? from the bios for example i choose wteher i want to use the AGP ati card for more "modern" games or use the s3 for old games.

There should be a section for the CPU configuration where the multiplier (if unlocked), FSB and core voltage can be adjusted. If those aren't present, then the motherboard doesn't have the feature.

"Lastly, there is also the hardware-based Throttle Blaster. Similar to ACPI throttling but very granular."

this one seems very good actually. does it need soldering of any kind or is let's say "plug and play"? I am crap with soldering unless is very basic stuff. My father could do that but his eyesight doesn't allow him to do very small solderings anymore

It does need soldering skills.

Guessing the throttleblaster hijacks the prochot function on the power monitor chip?

Gmlb256 wrote on 2024-12-22, 13:18:

There should be a section for the CPU configuration where the multiplier (if unlocked), FSB and core voltage can be adjusted. If […]
Show full quote

Zaxxon wrote on 2024-12-22, 09:00:

I think it has , where i can check specifically, as this bios has a ton more of options than usual bios? from the bios for example i choose wteher i want to use the AGP ati card for more "modern" games or use the s3 for old games.

There should be a section for the CPU configuration where the multiplier (if unlocked), FSB and core voltage can be adjusted. If those aren't present, then the motherboard doesn't have the feature.

"Lastly, there is also the hardware-based Throttle Blaster. Similar to ACPI throttling but very granular."

this one seems very good actually. does it need soldering of any kind or is let's say "plug and play"? I am crap with soldering unless is very basic stuff. My father could do that but his eyesight doesn't allow him to do very small solderings anymore

It does need soldering skills.

ok found these on the bios, don't know if they are the values you were talking to.

I tried Cpugrab and somhow it works, it's not as granular as it should be, because while the game is actually slower, in some parts it ramps up faster, much faster. maybe the game was coded to use every ounce of power from the cpu, regardless that you like it or no

myne wrote on 2024-12-22, 14:00:

Guessing the throttleblaster hijacks the prochot function on the power monitor chip?

Throttle Blaster uses the STPCLK# pin from the Socket/Slot to perform its functionality.

Zaxxon wrote on 2024-12-22, 09:00:

ok found these on the bios, don't know if they are the values you were talking to.

Yes, those are the values that I'm talking about. CPU speed setting is the safest one to use, 300 MHz would set the FSB to 66 MHz (66 x 4.5 = 300 MHz). It is still too fast for some speed-sensitive games, but it can be combined with slowdown utilities.

Gmlb256 wrote on 2024-12-22, 16:42:

Throttle Blaster uses the STPCLK# pin from the Socket/Slot to perform its functionality. […]
Show full quote

myne wrote on 2024-12-22, 14:00:

Guessing the throttleblaster hijacks the prochot function on the power monitor chip?

Throttle Blaster uses the STPCLK# pin from the Socket/Slot to perform its functionality.

Zaxxon wrote on 2024-12-22, 09:00:

ok found these on the bios, don't know if they are the values you were talking to.

Yes, those are the values that I'm talking about. CPU speed setting is the safest one to use, 300 MHz would set the FSB to 66 MHz (66 x 4.5 = 300 MHz). It is still too fast for some speed-sensitive games, but it can be combined with slowdown utilities.

Right. That's what the hardware monitor triggers when prochot (processor hot) is active.

Iirc the winbonds can trigger it for as high as 70% duty cycle (Ie 30% of the speed)

Gmlb256 wrote on 2024-12-22, 16:42:

Throttle Blaster uses the STPCLK# pin from the Socket/Slot to perform its functionality. […]
Show full quote

myne wrote on 2024-12-22, 14:00:

Guessing the throttleblaster hijacks the prochot function on the power monitor chip?

Throttle Blaster uses the STPCLK# pin from the Socket/Slot to perform its functionality.

Zaxxon wrote on 2024-12-22, 09:00:

ok found these on the bios, don't know if they are the values you were talking to.

Yes, those are the values that I'm talking about. CPU speed setting is the safest one to use, 300 MHz would set the FSB to 66 MHz (66 x 4.5 = 300 MHz). It is still too fast for some speed-sensitive games, but it can be combined with slowdown utilities.

ok thanks will use that and try, thanks again 😀

the others are non-safe but can achieve bette results as in more slowness?

Zaxxon wrote on 2024-12-23, 18:59:

ok thanks will use that and try, thanks again 😀

the others are non-safe but can achieve bette results as in more slowness?

"CPU Bus/PCI Freq. (Mhz)" does achieve the same results. However, it is less safe due to having options that makes the PCI (33 MHz) and AGP (66 MHz) buses run out of spec. Some of these are only intended for overclocking.

The lowest one which is 66.8/33.40, does the same as selecting 300 MHz in "CPU Speed". Setting 100.3/33.43 will run the CPU frequency at 450 MHz.

If you want to put the CPU frequency back to 600 MHz, set it to 133.0/33.25.

You could try to turn off l2 cache and see where that gets you.

Joakim wrote on 2024-12-24, 09:26:

You could try to turn off l2 cache and see where that gets you.

from cpuspd you mean? did that and nothing changed, on dos games at least

Gmlb256 wrote on 2024-12-23, 19:16:

"CPU Bus/PCI Freq. (Mhz)" does achieve the same results. However, it is less safe due to having options that makes the PCI (33 M […]
Show full quote

Zaxxon wrote on 2024-12-23, 18:59:

ok thanks will use that and try, thanks again 😀

the others are non-safe but can achieve bette results as in more slowness?

"CPU Bus/PCI Freq. (Mhz)" does achieve the same results. However, it is less safe due to having options that makes the PCI (33 MHz) and AGP (66 MHz) buses run out of spec. Some of these are only intended for overclocking.

The lowest one which is 66.8/33.40, does the same as selecting 300 MHz in "CPU Speed". Setting 100.3/33.43 will run the CPU frequency at 450 MHz.

If you want to put the CPU frequency back to 600 MHz, set it to 133.0/33.25.

ah ok , no will stick to the manual ones , thanks 😀