Foxconn P35A Series User Manual page 32

Overclock Options
CMOS Setup Utility - Copyright (C) 1985-2005, American Megatrends, Inc.
Overclock Options
FOX Ratio Select
CPU FSB Type
Memory Target Frequency
CPU FSB Over Clock Choice
PCIE Freq Over Clock(MHz)
Spread Spectrum
Memory Remap Feature
PCI MMIO Allocation: 4GB to 3072MB
DRAM Frequency
Configure DRAM Timing by SPD
Memory Hole
↑↓←→:Move Enter:Select
F7:Previous Values
Inside Intel chipset, there is a ratio number (we called it FOX Ratio here) which is defined as
the value of the memory clock divided by the CPU clock.
Normally, multiply CPU clock by 4, you can get the CPU Front Side BUS speed. While for
DDR2 memory, multiply memory clock by 2, you can get DDR2 memory speed.
In this section, we will explain how to overclock your memory or CPU.
CPU FSB Speed
1333MHz
1333MHz
1066MHz
1066MHz
800MHz
800MHz
The above table lists the Ratio numbers come with different combinations of CPUs and
memories.
A Normal, Non-overclocking System :
We set FOX Ratio to disabled, and DRAM Frequency to Auto.
In a CPU FSB 1333MHz system, if a DDR2 800MHz memory is installed, then FOX Ratio
number will be set to 1:1.2. Same CPU (FSB 1333MHz), if we install a DDR2 667MHz
memory, then FOX Ratio number will be set to 1:1.
Overclock Options
[Disabled] [Disabled]
800MHz
800MHz
[ 800]
[100]
[Enabled]
[Enabled]
[Auto]
[Enabled]
[Disabled]
+/-/:Value
F8:Fail-Safe Defaults
DDR2 Speed CPU Clock
800MHz 333MHz
667MHz 333MHz
800MHz 266MHz
667MHz 266MHz
800MHz 200MHz
667MHz 200MHz
Help Item
Select FSB:MEM Ratio
F10:Save ESC:Exit
F9:Optimized Defaults
Memory Clock
400MHz
333MHz
400MHz
333MHz
400MHz
333MHz
25
F1:General Help
FOX Ratio Select
1:1.2
1:1
1:1.5
1:1.25
1:2
1:1.66