GasparB123 wrote on 2021-06-26, 04:11:

Hello, I have a retro computer that I use to run some old windows 98/XP software. It originally came with an AMD Duron 800, but I bought and upgraded it to a Sempron 2300+. All is well, at startup it recognizes the new processor. The problem is when I install 98SE or XP, the computer believes it is an Athlon MP running at 950 mhz.

Tipo de procesador AMD Athlon MP, 950 MHz (9.5 x 100)

...

Your problem has nothing to do with what your OS or computer believes. From the report it can be clearly seen that your CPU really runs at 950 Mhz (that is 9.5 * 100). By specification your CPU should run at 1583 Mhz (9.5 *166Mhz). As you can see your problem is the 100 Mhz bus frequency (instead of 166 Mhz), the 9.5x CPU multiplier is recognized properly. Your motherboard most likely does not support 166 MHz FSB but you can try to set it in the BIOS manually to 133MHz. This way you will get ~1266 Mhz (9.5 * 133).

Assuming you have revision 9.2 of the board, here is the manual .

Setting bus clock requires changing jumpers (see page 29 of pdf) .

Here is what is likely the latest BIOS ( apparently for revision 9.2A of the board according to https://web.archive.org/web/20060319060248/ht … nuID=35&LanID=0 ):

Some drivers to be found here (if you avoid the ads and downloader apps and just download what you want/need) :
https://members.driverguide.com/driver_search … ?ref=h2&q=m825g
Personally, I would use reference drivers from the chipset manufacturer .

Falcosoft wrote on 2021-06-26, 05:53:

GasparB123 wrote on 2021-06-26, 04:11:

Hello, I have a retro computer that I use to run some old windows 98/XP software. It originally came with an AMD Duron 800, but I bought and upgraded it to a Sempron 2300+. All is well, at startup it recognizes the new processor. The problem is when I install 98SE or XP, the computer believes it is an Athlon MP running at 950 mhz.

Tipo de procesador AMD Athlon MP, 950 MHz (9.5 x 100)

...

Your problem has nothing to do with what your OS or computer believes. From the report it can be clearly seen that your CPU really runs at 950 Mhz (that is 9.5 * 100). By specification your CPU should run at 1583 Mhz (9.5 *166Mhz). As you can see your problem is the 100 Mhz bus frequency (instead of 166 Mhz), the 9.5x CPU multiplier is recognized properly. Your motherboard most likely does not support 166 MHz FSB but you can try to set it in the BIOS manually to 133MHz. This way you will get ~1266 Mhz (9.5 * 133).

Thanks a lot for this, thanks for the info. I had not realized that the base frequency was modified via hardware. Thanks to the manual passed on by darry, I found the corresponding jumper on the motherboard and it supports 166 mhz. So I will try this. Thanks again.

darry wrote on 2021-06-26, 06:07:

Assuming you have revision 9.2 of the board, here is the manual . […]
Show full quote

Assuming you have revision 9.2 of the board, here is the manual .

Setting bus clock requires changing jumpers (see page 29 of pdf) .

825G_v9.2B.pdf

Here is what is likely the latest BIOS ( apparently for revision 9.2A of the board according to https://web.archive.org/web/20060319060248/ht … nuID=35&LanID=0 ):
050516S.zip

Some drivers to be found here (if you avoid the ads and downloader apps and just download what you want/need) :
https://members.driverguide.com/driver_search … ?ref=h2&q=m825g
Personally, I would use reference drivers from the chipset manufacturer .

This is awesome, thanks a lot. I was looking for that bios for agess. I tried navigating the web archive for it but the intermediate pages were down at the moment. I'll try this and get back to you.

Welp, the jumpers are there, but it's directly wired. Don't know what to do now, I'm not really a soldering expert.

GasparB123 wrote on 2021-06-26, 15:29:

Welp, the jumpers are there, but it's directly wired. Don't know what to do now, I'm not really a soldering expert.

Here is an image of how the jumpers look (JP3 and Jp4)

GasparB123 wrote on 2021-06-26, 21:13:

GasparB123 wrote on 2021-06-26, 15:29:

Welp, the jumpers are there, but it's directly wired. Don't know what to do now, I'm not really a soldering expert.

Here is an image of how the jumpers look (JP3 and Jp4)

WhatsApp Image 2021-06-26 at 6.07.12 PM.jpeg

That does complicate things . There may be a reason, other than cost-cutting, for that being permanently hardwired . Maybe this board revision is not stable at higher clocks . There may also be components missing for higher clocks to work . Either way, if you want to try it without soldering in a jumper block yourself, your best bet is finding a local TV repair shop place that could probably do it for you for a small fee .

That being said, it may be simpler to get a better motherboard .

darry wrote on 2021-06-26, 21:29:

GasparB123 wrote on 2021-06-26, 21:13:

GasparB123 wrote on 2021-06-26, 15:29:

Welp, the jumpers are there, but it's directly wired. Don't know what to do now, I'm not really a soldering expert.

Here is an image of how the jumpers look (JP3 and Jp4)

WhatsApp Image 2021-06-26 at 6.07.12 PM.jpeg

That does complicate things . There may be a reason, other than cost-cutting, for that being permanently hardwired . Maybe this board revision is not stable at higher clocks . There may also be components missing for higher clocks to work . Either way, if you want to try it without soldering in a jumper block yourself, your best bet is finding a local TV repair shop place that could probably do it for you for a small fee .

That being said, it may be simpler to get a better motherboard .

Yes, you may be right about getting a better motherboard. I'm from Argentina and I can't find anymore Socket 462 boards in my local area, and bringing it in from the capital is kind of expensive. I mean, if they could install the jumper male pin header, I could just use a pair of female jumpers, try the different frequencies, and see what sticks.

It seems weird that it would be unstable or missing components, if the manual you passed on to me says it can be changed 🤣, but oh well, I'll give it a shot.