Okay, I believe almost all of the BX boards were slot 1 designs and so what you need to think about initially is getting a slocket or slotket or whatever the companies are calling them now. I have one in my computer and it has worked great. I don't remember who made it whether it was ASUS or IWILL or something. That will adapt the FCPGA (Flip Chip Pin Grid Array, Socket 370) processors that are currently available for Pentium III and Celeron so they will work on your board. Looking at Abit's wepage for BIOS updates for your board, the last one was 05/08/2000, so over a year old and at that point it looks like it was supporting Celerons up to 600 MHz and PIIIs up to 700 MHz. Now the Celeron at 600 MHz is really a multiplier of 9.0*66.6 which means in theory that it could support a Celeron OC'd to 900 MHz (or one of the new ones like you linked to) or a PIII at 9.0*100 MHz. The other thing to watch out for is the ability for the new BIOS to provide lower voltages because the newer processors require lower voltages than the old ones. I don't know how your board handles FSB, Multiplier and Voltage settings, but if they are changed in the BIOS, then you should download the latest BIOS, flash it and see what you can do.