The person who deserves most, if not all, the credit for making this possible is the individual who first figured this all out (If I'm wrong, please tell me who did). You can find their webpage at Kikumarus' Hardware Lab (This is where I got my information on how to accomplish this task).
The main reason why I did this was because I bought a Dual Pentium II 350 MHz system and felt stupid for doing so. I heard some felt stupid for buying a single-processor Celeron System. Don't feel bad if you're one of those; I purchased a Dual PII 350. :->
The last thing that pushed me over the edge on doing this was after hearing that my friend Hyrlik (www.sig11.org) did this (Also because I got jealous :->).
Lastly, I did this to see if it works. :) (Yeah, right, I just felt stupid for buying the Dual PII 350)
After reading a few web pages, I learned I could get the Celerons to work in dual mode. When I first heard this, it was with the Celeron slot1 CPU type. You had to drill the CPU and solder a wire to make it work. I got interested in this but was unsure of my drilling ability, so I bought two Pentium II 350 MHz CPUs instead. Then, Intel introduced the Intel Celeron PPGA CPUs. I wanted to know if those ran in Dual mode as well. I looked a little bit and found out you couldn't. :( Intel had bastardized that CPU as well. Then, after a little more hunting, I found out that you could run the Celeron PPGA CPUs in dual mode, just as long as you got the PPGA to Slot 1 converter. After searching, I discovered that all you needed to do was solder a wire from BR75 to a pin on the CPU. I got very excited about this and waited a while before I finally decided to go out and buy a Dual Motherboard, two Celeron 300As, and a PPGA-to-socket converter.
| Product | Cost |
| Asus P2B-D | $268.00 |
| Two Celeron 300A Retail Box | $145.00 |
| Two Bridge to Slot 1 for PPGA Celeron | $20.00 |
| Total: | $433 |
I waited about one week for my purchase to arrive and was very I was excited when I got it. Before I started soldering the Converter cards, I made sure each CPU worked. I plugged each CPU into the Motherboard, and each of them worked. Then, just for giggles, I put both CPUs in the machine to see if it would boot in dual mode. The thing wouldn't even boot up. :( I thought, "Okay, now I surely have to do some soldering." So I pulled out my trusty Weller Soldering iron and went to work. I pulled a strand of wire from some speaker wire I had lying on the floor since I couldn't find anything small enough locally here (figures). I wondered if not being shielded would cause a problem, but I thought, "Well, just as long as it doesn't touch anything, I should be okay." So I went to work. First, I soldered one end of the wire to the BR75 and then soldered the other to the an17 pin on the Converter card. I then popped the CPU back into the card, put it in the machine, and it booted. Good! It still works. I then repeated the same procedure on the second card. I stuck both CPU cards in the machine, and the thing booted up, saying, "2 system processors detected." Woohoo! It detected BOTH CPUs.
As of April 19, 1999, the machine has been running for about one month. The machine has yet to crash. So, as far as stability, it has worked fine for the past month. Pretty good for a price tag of $433.00. :)
That's all there is to it. You're probably wondering about the benchmarks and such. Well, look down below. There are a couple of them.
That's all I have for now for benchmarks. I'll be sure to update that as soon as possible. For now, I'll leave you with some pictures of the CPUs just so you know I'm not exaggerating:
Some people kept bugging me about how small my case was. So I took a picture of the machine in its real case
Inside of the real case