Significant power savings of the AMD Athlon processor only occur if the processor is disconnected from the system bus by the Northbridge while in the Halt or Stop Grant state. The Northbridge can optionally initiate a bus disconnect upon the receipt of a Halt or Stop Grant special cycle. The option of disconnecting is controlled by an enable bits in the Northbridge.

Program key features:
- Enables bus disconnect bit in the Northbridge.
- Full control under Clock Control (CLK_CTL) MSR
that determine the internal clock divisor when
- Athlon system (S2k) bus is disconnected

Supported processors:
AMD Duron, Athlon Processors Model 2,3,4 (w/ limitations)
AMD Duron, Athlon, Athlon XP/MP Processors Model 6 & upper

Supported chipsets:
VIA KT133, KT133A, KLE133, KX133, KM266, KT266, KT266A, KT333, KT333 CF,KT400,KM400, KT600

nVidia nForce series, nForce2 SIS 730, 733, 735, 740, 745, 755, 746, 748

AMD 751, 760, 761, 762