Sorry about the 1/1, it doesn't apply to the KT133 or KT133A chipsets since the minimum FSB is 100 MHz. The KT133 had a fixed 2/3 AGP divider, which was fine since it wouldn't run much over 110 MHz anyway. I would assume that the KT133A would automatically invoke the 1/2 divider as the FSB increases. Somewhere between 120 MHz and 124 MHz is the usual range for that. So you're not likely to find any setting for it.