Ok, look at pages 9 and 10 of your ECS KT600-A owner's manual. See the jumpers JP8 and JP9 that they show there. You want to cap pins 2 & 3 on both of them. This sets the CPU's frontside bus speed to 166MHz like your Sempron is wanting.Originally posted by: synon28
ecs kt600-a 462 socket motherboard amd sempron 3000? i think....