The 8K7A has a much slower chipset,the Amd 761 northbridge.It has a 686B Via Southbridge.Although it was the best overclocker of its time,its too slow compared to the 266A,333,and 400 Via chipsets.I know this because I own one,my 12 year old daughter uses it.It has a 1400 T-bird and Crucial 2100...