Welcome!

two things:

The cpu voltage should be set at 2.2v or 2.3v so your board should support that. 2.4v should also not be an issue but any higher I would not recommend unless you have a good cooler, I consider 2.5v the absolute max.. The current mmx is set at 2.8v.

The multiplier should be set at 4,5x to get 4,5x66 = 300mhz. Your board in the pictures only goes up to 3,5x but that is with jp15 open and set with jp1 and jp2. There is a good chance that when you close jp15 you can acces the higher multiplier on the chip by simply playing with jp1 and jp2. No harm will be done if it doesn't work or work at the wrong speed. When you can accidently set 5x and it posts then simply keep playing with jp1 and jp2 to find the 4,5 setting. If it does not post also try the next setting.

Worst case you can run it at least at 3,5x66= 233mhz. But most intel mmx cpu's will also run just fine at that setting (unless it's a locked cpu).

It appears to be a Rhino 9, though you'll have to look at the information posted here to know for sure. http://www.elhvb.com/webhq/models/pentium/rhino9.htm

A photo of the motherboard without the cables covering up so much of it would be more helpful in identifying it, but the manual in the link should allow you to know for sure. The POST screen should list the chipset to confirm that it's an Intel 430HX.

The Asus P55T2P4 is also a 430HX chipset motherboard, but it's capable of running a K6-2+ @500 MHz. It has jumper settings on the motherboard that tell you how to set the FSB to 83 MHz, and it has undocumented jumper settings that allow you to set the CPU core voltage to 2.0 volts. That last official Asus BIOS for the board didn't display the proper speed or support all of the CPUs features, but it worked. Jan Steunebrink modified the BIOS to support them, and display the correct speed.

Unfortunately, it doesn't look as though your board was as popular, so I found no information about CPU support, or undocumented jumper settings.

Another manual, and some BIOS files are listed here: https://www.infania.net/misc/moboarchive/Octe … 20HX/index.html

meljor wrote:

Welcome! […]
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Welcome!

two things:

The cpu voltage should be set at 2.2v or 2.3v so your board should support that. 2.4v should also not be an issue but any higher I would not recommend unless you have a good cooler, I consider 2.5v the absolute max.. The current mmx is set at 2.8v.

The multiplier should be set at 4,5x to get 4,5x66 = 300mhz. Your board in the pictures only goes up to 3,5x but that is with jp15 open and set with jp1 and jp2. There is a good chance that when you close jp15 you can acces the higher multiplier on the chip by simply playing with jp1 and jp2. No harm will be done if it doesn't work or work at the wrong speed. When you can accidently set 5x and it posts then simply keep playing with jp1 and jp2 to find the 4,5 setting. If it does not post also try the next setting.

Worst case you can run it at least at 3,5x66= 233mhz. But most intel mmx cpu's will also run just fine at that setting (unless it's a locked cpu).

Any chance you could highlight the right jumper positions over this zoomed picture I took? I'm really bad with this jumper stuff, believe me. 😁

https://imgur.com/a/KEkAd0Q

Or do you have a Rhino p-15? It appears that you do: https://www.ebay.com/itm/OCTEK-RHINO-P15-REV- … d-/264056801050

Manual and BIOS: http://www.elhvb.com/mobokive/archive/octek/P … 2015/index.html

Repo Man11 wrote:

Or do you have a Rhino p-15? It appears that you do

Yes, I just looked it up. Post states "Rhino 15, ITE 8679, 097-053, 24 SEP, 97"

Torso wrote:

Any chance you could highlight the right jumper positions over this zoomed picture I took? I'm really bad with this jumper stuff […]
Show full quote

meljor wrote:

Welcome! […]
Show full quote

Welcome!

two things:

The cpu voltage should be set at 2.2v or 2.3v so your board should support that. 2.4v should also not be an issue but any higher I would not recommend unless you have a good cooler, I consider 2.5v the absolute max.. The current mmx is set at 2.8v.

The multiplier should be set at 4,5x to get 4,5x66 = 300mhz. Your board in the pictures only goes up to 3,5x but that is with jp15 open and set with jp1 and jp2. There is a good chance that when you close jp15 you can acces the higher multiplier on the chip by simply playing with jp1 and jp2. No harm will be done if it doesn't work or work at the wrong speed. When you can accidently set 5x and it posts then simply keep playing with jp1 and jp2 to find the 4,5 setting. If it does not post also try the next setting.

Worst case you can run it at least at 3,5x66= 233mhz. But most intel mmx cpu's will also run just fine at that setting (unless it's a locked cpu).

Any chance you could highlight the right jumper positions over this zoomed picture I took? I'm really bad with this jumper stuff, believe me. 😁

jp2 is at 2-3 at the moment and jp3 is at 1-2. I would try jp15 at 1-2 (jumper now missing) and test. After that you can try jp1 and/or jp2 at different settings with jp15 still at 1-2

https://imgur.com/a/KEkAd0Q

meljor wrote:

Torso wrote:

meljor wrote:

jp2 is at 2-3 at the moment and jp3 is at 1-2. I would try jp15 at 1-2 (jumper now missing) and test. After that you can try jp1 and/or jp2 at different settings with jp15 still at 1-2

https://imgur.com/a/KEkAd0Q

Damn, I just can't get it to post. Probably doing something totally wrong.

I also have an AMD K6-2 300mhz CPU. That one posts and I can change the clock speed between 133/200/233/266/366, but it just beeps and resets after memory test.

Are you running the most recent BIOS version?

I apologize if you already posted that you were, but I didn't see it on the read through.

I managed to get the CPU running at 300mhz with this jumper configuration. Although, at one boot it was 333mhz, so a bit unstable? I tested Unreal, Half-Life and Quake 2 and noticed some performance improvement, but still big fps drops in bigger areas. When trying to start CPUID, windows gives a bluescreen, so something might be amiss here. Also, unsurprisingly, I noticed some overheating issues. I have a proper fan and a heat sink on the way. So.. Any thoughts ? Is this working as intended or is something still wrong?

Jumper configuration: https://pasteboard.co/IEfYBX0.jpg

Did you lower the voltage??? Running at the intel mmx setting (2,8v) is not a good idea... also keep trying, one setting should yield the 4x or 4,5x setting because it's now running at 5x (333mhz).

I love those mmx days.

meljor wrote:

Did you lower the voltage??? Running at the intel mmx setting (2,8v) is not a good idea... also keep trying, one setting should yield the 4x or 4,5x setting because it's now running at 5x (333mhz).

2,5v is the lowest I can go, with the "open" settng. I'v been troubleshooting this with the original manual now, and slowly starting to get the hang of it, thaks for all the info. Yeah, I'll keep fiddling with the settings.