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Appendix I: Over Clocking
Important
Before you attempt to overclock your system, we strongly recommend that you obtain a
u
nderstanding of all of the variables, procedures, and the potential risks associated with overclocking.
Because we canno
t control of all of the possible variables that exist (i.e. memory, AGP card, user
configurations, cool
ing apparatus etc), we cannot assume responsibility from damage to any
component
s of your system due to overclocking.
What is over
clocking?
Overclocking is accelerating
beyond wh
at those components were rated for. With this mainboard, depending on the model, you
may be able to overclock some or all of the following:
CPU Speed
FSB (Front Side Bus) fre
DDR (Mem
ory) frequency
AGP (Accelerated Graphics Po
PCI (Peripheral Connect Interface) frequ
SRC (Serial Reference Cloc
How to calcu
late your new frequencies.
With this mainboard, the frequencies mentioned above ar
These for
mulas have a single "CPU Host Frequency" in common. For each of the items above there
is also a multiplier or a divisor that is ap
frequency for each component as shown in
CPU Speed
=
FSB frequency
=
DDR frequency
=
AGP frequency
=
P
CI frequency
=
SRC frequency
=
Configuring your system for overclocking
the BIOS Setup Utility and changing "DDR:CPU Ratio
Frequency".
N
ote that the FSB multiplier for Intel based mainboards will always be fixed at 4. The AGP, PCI and
SRC frequencies ar
e all determined by the BIOS setting AGP/ PCI/ SRC Speed Setting.
the processing speed of certain components of your system above and
quency
rt) frequency
ency
k) frequency
plied to the "CPU Host Frequency" to determine the final
the following formulas.
CPU Host Frequency
*
CPU Host Frequenc
y
*
CPU Host Frequency
*
CPU Host Frequency
/
CPU Host Frequency
/
CPU Host Frequency
/
is simply understanding the formulas above and going into
45
PX865PEL-800
e calculated using individual formulas.
CPU Clock Ratio
FSB multiplier
DDR:CPU Ratio
AGP divisor
PCI divisor
SRC divisor
", "CPU Clock Ratio" and "CPU Host
thorough
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