Luckybob, thank you for that website. I love this guy's work. I might try a combination of his ideas (http://tipperlinne.com/p2b-ds.htm & http://tipperlinne.com/p2b-dsvtt.htm) to get a 1 GHz Slot 1 Coppermine working in my Tyan S1832DL board. I have rev. C, which apparently only supports up to 600 MHz Katmai CPUs. I tried running my dual 1 GHz PIII slot 1's, but the system did not turn on. I had no idea that if the motherboard didn't supply the correct voltage that the CPU was requesting, it would shutdown. From the link you sent, it looks like there is a very easy way to trick the motherboard into thinking that a supported voltage is being requested. I hope that the case is so simple with this Tyan board. I am using the latest BIOS which supports Coppermines on later rev boards.
While I don't have any interest in running dual Tualatins in a Slot 1, I am interested in getting dual 1 GHz Slot 1's working, and if my existing dual 850 MHz slot 1 board dies, I'll begin testing out this guy's ideas. As there are dual socket 370 boards w/AGP, PCI-X, and 4 GB RAM support, I find the Tualatins PIII-S CPUs are best left to those motherboards.
Plan your life wisely, you'll be dead before you know it.