Pentium uses a 30 pin VRM if I remember correctly.. I can't say i've ever seen one IRL however, most of the boards of the era i remember sometimes having some jumpers on the 30 pin header, but never seen one with the VRM socket populated.. Here's a datasheet for the 30 Pin VRM though, so you might be able to make a substitute up yourself.

http://www.littlediode.com/datasheets/pdf/Dat … -RCB/RCB002.PDF

Later model boards, PPro/PII era used a 40 pin VRM, and those are common enough that you can probably get one on ebay, but it won't help you with your Pentium board unfortunately..

It might also be possible to build a PCB adapter that would convert a standard PPro/PII 40 pin VRM to the 30 pin.. Would have to include a set of DIP switches to set the Vcore, and would definately have to use 5 V input 40 pin VRM's..

I would simply try to find a normal (non mmx) cpu, way easier.

Or run the mmx at 3,3v with a good cooler. Some people did that back then on the single voltage boards, it can handle the extra voltage as long as it is cooled properly.

I ended up buying an HP OEM VRM (p/n 0950-3188). It's a 30 pin module and looks very similar to the shuttle one. This part is specifically for P55 chips, so it only puts out 2.8v. That limits me to an MMX, but I'm fine with that. I have a super socket 7 build planned where I can play with the more interesting CPUs 😎

The part showed up today, but I won't have a chance to test it until Monday. In theory it should work, as the motherboard doesn't have to 'know' which vrm is installed, only whether or not there is one.

meljor wrote:

I would simply try to find a normal (non mmx) cpu, way easier.

Or run the mmx at 3,3v with a good cooler. Some people did that back then on the single voltage boards, it can handle the extra voltage as long as it is cooled properly.

Or spend a little extra for a POD MMX.