Product specifications

Design Guide - VT82C694X Apollo Pro133 with VT82C686A
Preliminary Revision 0.5, November 19, 1999 33 Motherboard Design Guidelines
Technologies, Inc.
We ConnectWe Connect
2.3.2.4 System Clock Combinations
The major clock combinations for an Apollo Pro133A based system are listed in Table 8. Clock frequencies for the AGP clock
and PCI clock are 66MHz and 33MHz respectively. Various clock combinations for the CPU clock and the SDRAM clock are
determined by power-up strap options on MAB12# and MAB8#.
Table 2-8. Apollo Pro133A System Clock Combinations
CPU CLOCK SDRAM CLOCK AGP CLOCK PCI CLOCK CPU/PCI RATIO
133 MHz 66 MHz 33 MHz 4
133 MHz
100 MHz 66 MHz 33 MHz 4
133 MHz 66 MHz 33 MHz 3
100 MHz 66 MHz 33 MHz 3100 MHz
66 MHz 66 MHz 33 MHz 3
100 MHz 66 MHz 33 MHz 2
66 MHz
66 MHz 66 MHz 33 MHz 2