PX865PEC PRO
28
DDR Speed
This item displays the current DDR memory speed.
Spread Spectrum
The Spread Spectrum function can reduce the EMI (Electromagnetic Interference) generated. Options:
Enabled (default)
、
Disabled
AGP/PCI/SRC Speed Setting
This item determines the AGP, PCI and SRC frequencies (speed settings). You can set these
frequencies using the supplied BIOS options. One of the options available to you is “Auto, Auto,
Auto”. Using the “Auto, Auto, Auto” option will instruct the system to automatically calculate these
frequencies based on the factory default “CPU Host Frequency” setting, the current “CPU Host
Frequency” setting and the formulas in the table below. Note that the factory default “CPU Host
Frequency” is the value of the “CPU Host Frequency” when you first received your system.
Factory Default
“CPU Host
Frequency”
Formulas
100
AGP frequency
=
current
CPU Host Frequency / 1.5
PCI frequency
=
current
CPU Host Frequency / 3
SRC frequency
=
current
CPU Host Frequency / 1
133
AGP frequency
=
current
CPU Host Frequency / 2
PCI frequency
=
current
CPU Host Frequency / 4
SRC frequency
=
current
CPU Host Frequency / 1.33
200
AGP frequency
=
current
CPU Host Frequency / 3
PCI frequency
=
current
CPU Host Frequency / 6
SRC frequency
=
current
CPU Host Frequency / 2
To determine your new frequencies, you must first take the factory default “CPU Host Frequency”
and then determine the corresponding formulas according to the table above. Second, take the current
“CPU Host Frequency” setting and apply it to the formulas to arrive at your new frequencies.
For example, if your factory default “CPU Host Frequency” was 133, and you reset the “CPU Host
Frequency” to 200, your AGP, PCI and SRC frequencies will be as follows:
AGP Frequency = 200 / 2
= 100
PCI Frequency = 200 / 4
= 50
SRC Frequency = 200 / 1.33 = 150.38
