User`s guide

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Motherboard User’s Guide
DDR Timing by SPD
This item enables or disables the DDR timing defined by the
Serial Presence Detect electrical.
DDR CAS# Latency
This item determines the operation of DDR memory CAS
(column address strobe). It is recommended that you leave this
item at the default value. The 2T setting requires faster
memory that specifically supports this mode.
DRAM Bank Interleave
Enable this item to increase DDR memory speed. When
enabled, separate memory banks are set for odd and even
addresses, and upcoming byte of memory is accessible while
refreshing the current byte.
AGP Aperture Size
This option determines the effective size of the AGP Graphic
Aperture, where memory-mapped graphic data structures are
located.
Auto Detect DIMM/PCI Clk
When this item is enabled, BIOS will disable the clock signal of
free DIMM/PCI slots.
Clock Spread Spectrum
This item enables the clock to generate spread spectrum.