我在amd的網站上看到是AMD-762™ System Controller
The AMD-762 system controller provides the bridging function between the high-speed host-processor buses, AGP graphics subsystem, DDR memory subsystem, and the PCI interface.

Key features of the AMD-762 system controller are as follows:

Two 266 MHz point-to-point AMD system buses, providing uniprocessor or two-way symmetric multiprocessor capability
PC2100 DDR (Double Data Rate) Memory Controller with support for up to 4 GB of memory space (supports four Registered DIMM slots)
AGP-4X Interface (supporting 1X and 2X modes)
Dual Mode PCI 2.2-Compliant PCI Bus Interface
66-MHz clock with 32-bit and 64-bit data path support (supports up to two PCI slots3 )
33-MHz clock with 32-bit and 64-bit data path support (supports up to seven PCI devices 4)
A 949-pin Ceramic Column Grid Array (CCGA) package
2.5 V Core
我以為66mhz只能在插上兩個66mhz的情況下才能全速...
以下為華碩網站上的資料.
A7M266-D supports up to two AthlonTM MP processors, or single AthlonTM XP/AthlonTM socket A processor