OC Weirding Out

[WinNut]

This is dealing with some retro hardware so some people may not be able to answer this one.

 

 

Motherboard: Asus SP97-V

CPU: Intel Pentium MMX 233

RAM: 48MB generic stuff

HDD: Dual Seagate Medalist drives (this was da beast in the day)

Case: AOpen AT Case

PSU: Generic AT PSU

 

Here's the problem.

 

The CPU was first running at 233 MHz with the multiplier set to 1.5X (stock). I then decided to push it harder, so I went into the case and refers to the chart printed on the PCB, which told me to set some jumpers to run at 4X. Fine. So I set the jumpers according to the chart. When I did that, the CPU suddenly clocked down to 200MHz. Does anybody know why this happened?

[jameshumphries47]

no I don't but a one point. that is retro.... proper retro, what OS are you running on it?

[Kyuubixchidori]

why don't you buy a computer exponentially faster for like 20$? sorry have to be the first to say this. but if its just for fun, have fun with your retro project!

[WinNut]

no I don't but a one point. that is retro.... proper retro, what OS are you running on it?

Windows 95...needs a reinstall, I think some files are corrupt as when I open command.com it thinks that it is an illegal operation before actually opening the DOS prompt.

[Shd0w2]

Old man... First, what os are you using? Bios version?

[jameshumphries47]

@WinNut aha 95 FTW!!!

[WinNut]

why don't you buy a computer exponentially faster for like 20$? sorry have to be the first to say this. but if its just for fun, have fun with your retro project!

It's just a for-kicks retro project. If it catches fire I think there is a fire extinguisher on the cabinet next to the pencil sharpener.

 

Old man... First, what os are you using? Bios version?

BIOS version I need to find out, but I am running Windows 95.

 

 

This is my teacher's rig, by the way, but he let me play with it and he keeps a screwdriver out for me. Awesome dude.

[daemonowner]

If it catches fire I think there is a fire extinguisher on the cabinet next to the pencil sharpener.

 

Sorry, I just felt like quoting this.

[WinNut]

I think the CPU is not getting enough voltage to go up there.

[WinNut]

@WinNut did you check your jumpers? Maybe something got missed or looked over... I don't think that CPUs this old had throttling, and if it's clocking DOWN, and had throttling, maybe the voltage went too high and it throttled? What junpers did you change?

There was a set of three labeled BF0, BF1, and BF2, and next to it was a small chart telling you how to position each jumper for each multiplier.

 

I have to look into voltage, there is a similar row of jumpers below the CPU socket. I have to investigate those.

[WinNut]

http://www.motherboards.org/files/manuals/1/sp97v-104.pdf

 

According to the guide it turns out that the unidentified jumpers are the voltage control jumpers. Now I have to figure out what does what.

[WinNut]

Also according to the manual there are jumpers to turn up the bus frequency, I may want to look into those.

 

 

Do you think I should up the voltage to 2.9 (2.8 stock)?

 

EDIT

 

The manual mentions "WARNING! DO NOT OVERCLOCK YOUR PROCESSOR" but the thing is 18 years old, like I am going to follow that damn warning.

[WinNut]

Ah. Ok good luck!

Tomorrow is my next OC oppourtunity, I'll update you guys.

[WinNut]

Ah. Ok good luck!

Actually how does this sound:

 

75MHz x 3.5 = 266 MHz

 

I think I will go there first and slowly move up from there.

[WinNut]

according to my iphone, 75x3.5 = 262.5...

I just did a little rounding work.

[WinNut]

I DID IT!!

I pushed the BCLK to 75Mhz by 3.5X and pushed 262 MHz, but it got really hot fast so I may want to change the heatsink. Anybody know where I can get a heatsink for such?