It's quite possible that Win2000 properly uses AMD's PowerNow! dynamic core frequency control. Did you try checking frequency of the cpu under heavy load?

chiveicrook wrote on 2022-06-02, 06:53:

It's quite possible that Win2000 properly uses AMD's PowerNow! dynamic core frequency control. Did you try checking frequency of the cpu under heavy load?

That's a good point.
I have noticed that at times the frequency reads 0Mhz, then jumps to half (300 if my cpu is set to 600)

However, I have done full load testing and benchmarks... but the CPU only hits half of the Mhz. And the benchmarks reflect that by having half of the score from Win98. (Sandra 99)

Is there anything in the BIOS that I can tweak to change that behavior? Or maybe it's some Windows update /hotfix /patch that I'm missing?

To add...

I've also downloaded and installed SP5.1 for Win2kPro.
No change (other than slowing my windows load time 🤣)

When I installed a Pentium 4 M (mobile) on a desktop I got exactly this problem. Can you tell me the exact model of this K6 III?

See if this works: AMD Powernow v3.04 (I'd be suprised if there isn't a BIOS option to disable it) https://www.driverguide.com/driver/detail.php … driverid=230832
Also check to see what Windows reports your FSB as.

For Intel you'd need Intel Speedstep

Whatever works post in the vogonsdrivers thread to get it added if it's not already there.

Rikintosh wrote on 2022-06-02, 20:36:

When I installed a Pentium 4 M (mobile) on a desktop I got exactly this problem. Can you tell me the exact model of this K6 III?

I have 3 different CPU's at my disposal that have the same behavior:

AMD K6 2 350Mhz
AMD K6 2+ 570Mhz
AMD K6 3+ 550Mhz

the "K6 2 350" shows as 175Mhz in Win2k
the "K6 2+ 570" I run at 600, so that shows as 300Mhz in Win2k
the "K6 3+ 550" I run at 633, so that shows 316Mhz in Win2k

If you benchmark it - does it score like a 600mhz cpu or 300mhz cpu?

What does cpu-z say?

I don't suppose you have tried booting any other OS, Dos or Windows or live Linux to see if the same problem?

DosFreak wrote on 2022-06-02, 20:46:

See if this works: AMD Powernow v3.04 (I'd be suprised if there isn't a BIOS option to disable it) https://www.driverguide.com/d […]
Show full quote

See if this works: AMD Powernow v3.04 (I'd be suprised if there isn't a BIOS option to disable it) https://www.driverguide.com/driver/detail.php … driverid=230832
Also check to see what Windows reports your FSB as.

For Intel you'd need Intel Speedstep

Whatever works post in the vogonsdrivers thread to get it added if it's not already there.

FSB is reporting half.
When I have it at 100fsb, win2k repots 50fsb

BinaryDemon wrote on 2022-06-02, 21:10:

If you benchmark it - does it score like a 600mhz cpu or 300mhz cpu?

Its score is exactly half of that that I get when I boot in Win98 with the same Sandra99 CPU benchmark

Sphere478 wrote on 2022-06-02, 21:29:

What does cpu-z say?

CPU Z shows 300Mhz & 50fsb when Win98's CPU Z shows 600Mhz & 100fsb

Jasin Natael wrote on 2022-06-02, 21:35:

I don't suppose you have tried booting any other OS, Dos or Windows or live Linux to see if the same problem?

Yes, I have multiple OS's on this system with System Commander.
Dos 6.22, Win 3.11, Win95, Win98, WinME, Win2kPro

Win98 seems to run best.
Win95 doesn't like it when my Mhz is higher than 300 (I get Protection Errors) and when I install the patch, it doesn't seem to work.
Dos 6.22 & Win3.11 work like a charm.
WinME is fine.
Win2k runs very slowly because of the halved FSB 🙁

Jasin Natael wrote on 2022-06-02, 21:35:

I don't suppose you have tried booting any other OS, Dos or Windows or live Linux to see if the same problem?

OP did say it reported correctly on DOS and 98SE

“ Just came back to say i sorted it out (APM rather than ACPI.) “

https://arstechnica.com/civis//viewtopic.php?f=17&t=772255

Sounds like this guy had the same issue, maybe reinstall with ACPI disabled?

BinaryDemon wrote on 2022-06-02, 22:53:

“ Just came back to say i sorted it out (APM rather than ACPI.) “

https://arstechnica.com/civis//viewtopic.php?f=17&t=772255

Sounds like this guy had the same issue, maybe reinstall with ACPI disabled?

Interesting! That does indeed sound like the same exact issue.
I guess I have some tinkering to do.

Thankfully I am not hesitant at all to reinstall Win2k. I never really loaded it up once I realized the Mhz issue.

I'll report back with how it responds to these methods.

debs3759 wrote on 2022-06-02, 22:46:

Jasin Natael wrote on 2022-06-02, 21:35:

I don't suppose you have tried booting any other OS, Dos or Windows or live Linux to see if the same problem?

OP did say it reported correctly on DOS and 98SE

Yes OP did (in the very first post)
My bad, don't know how I missed that....

It's been awhile since I've done it but I want to say a reinstall isn't necessary, think either switching it out in device manager and/or copying over some files will do it.

DosFreak wrote on 2022-06-03, 16:41:

It's been awhile since I've done it but I want to say a reinstall isn't necessary, think either switching it out in device manager and/or copying over some files will do it.

Oh really?

This is great news since I hadn't had the time to do the OS Reinstall.

What kind of search terms would you suggest I try to find information on this?

LMK!
Cheers!

Rikintosh wrote on 2022-06-02, 20:36:

When I installed a Pentium 4 M (mobile) on a desktop I got exactly this problem. Can you tell me the exact model of this K6 III?

Same here. It turned out the motherboard did not support SpeedStep so the CPU would run at 1200MHz. I installed the same CPU in an Abit IC7 and it worked correctly.

Socket3 wrote on 2022-06-04, 08:00:

Rikintosh wrote on 2022-06-02, 20:36:

When I installed a Pentium 4 M (mobile) on a desktop I got exactly this problem. Can you tell me the exact model of this K6 III?

Same here. It turned out the motherboard did not support SpeedStep so the CPU would run at 1200MHz. I installed the same CPU in an Abit IC7 and it worked correctly.

According to this guy, he solved the issue.
I haven't attempted it yet. The conversation is a little unclear to be honest.
What is described here doesn't make sense with the settings I have in my bios.

https://arstechnica.com/civis//viewtopic.php?f=17&t=772255

magimanred, during install of windows 2000 you can press F5, at some point... I don't think it's indicated... might be when the press F6 for driver disk is displayed..., which will allow you to select a different HAL, Hardware Abstraction Layer, to be used for your w2k install. Try selecting Standard PC, or MPS uniprocessor PC, anything aside from ACPI or Advanced Configuration and Power Interface.

heck, it's the same as the last message in that arstechnica link you posted.