I'm taking a wild guess and say it should support all 100 MHz FSB Thunderbirds, so I'd be upgrading to a 1100-1400 MHz Athlon if I were you.

Or see if you can set multiplier and voltage in the BIOS, then do the pencil trick on the Duron. These overclock well, my Duron 700 ran stable at 1049 MHz back then.

Should be a good match for a GeForce 4.

Also, take a look at the caps! Early Socket A boards are notorious for bad capacitors.

Thanks for the suggestions oerk. The caps are coated in nicotine but are looking to be in tip-top shape, unfortunately the bios is a bare OEM pile of crud. Il have to keep my eyes out for a good T-bird on ebay. Do you think I should swap power supplies? It has a 250watt with only like 8amps on the 12v rail currently which seems rather weak.

I have seen so many of these systems over the years, it's kinda crazy. (Still have one laying around, with a 1GHz PIII!) These particular ones used what's known as the "UWAVE" socket A motherboard, which is a modified version of the FIC AZ31 mobo. More info here: http://www.motherboards.org/forums/viewtopic.php?p=665585

Thanks for the info! I now know what original bios to look for to attempt a reflash. The funny thing is that so far I really like this machine. All standard, has plenty of room, lots of drive bays and very sturdy.

So the ti4200 died today 😒 weird video output on the vga (grey red and other colors flashing in different rectangles) and nothing over DVI. Looking at upgrading to a 1ghz T-bird and I have a 128mb Hercules 3D Prophet iii Geforce 3 ti-500 to swap into into it. It also recognized two 512mb pieces of pc133. Debating on either installing 98se, ME w/the original OEM key, or 2k pro.