this from Abit's website.
KR7A / KR7A-RAID
KR7A-133 / KR7A-133R
AMD SocketA Athlon (100 / 133MHz FSB) up to 1.4GHz.
AMD SocketA Duron (100 MHz FSB) up to 1.3GHz.
AMD SocketA AthlonXP Palomino (0.18 micron process) up to 2100+.
AMD SocketA AthlonXP Thoroughbred (0.13 micron process) up to 2000+.