Abit WI-2Pa User Manual page 36

3-10 Chapter 3
items by reading the contents in the SPD (Serial Presence Detect) device. The
EEPROM on the memory module stores critical parameter information about the
module, such as memory type, size, speed, voltage interface, and module banks.
CAS Latency Time
This item controls the latency between the DRAM read command and the time that
the data becomes actually available.
ACT. to Precharge Delay
This item controls the number of DRAM clocks used for DRAM parameters.
DRAM RAS# to CAS# Delay
This item controls the latency between the DRAM active command and the read/write
command.
DRAM RAS# Precharge
This item controls the idle clocks after issuing a precharge command to the DRAM.
DRAM Data Integrity Mode
Two options are available: ECC and Non-ECC. The default setting is Non-ECC. This
option is used to configure the type of DRAM in your system. ECC is "Error
Checking and Correction". Choose the ECC option only when your memory is ECC
type.
NOTE: When installed with Registered memory, the DRAM modules will be auto
detected and this item will be grayed out for display only.
Delayed Transaction
Two options are available: Enabled and Disabled. The default setting is Disabled. Set
the option to enabled or disabled PCI 2.1 features including passive release and
delayed transaction for the chipset. This function is used to meet the latency of PCI
cycles to or from the ISA bus. This option must be enabled to provide PCI 2.1
compliance. If you have an ISA card compatibility problem, you can try to enable or
disable this option for optimal results.
AGP Aperture Size
This option specifies the amount of system memory that can be used by the AGP
device. The aperture is a portion of the PCI memory address range dedicated for
graphics memory address space. Host cycles that hit the aperture range are forwarded
to the AGP without any translation. See www.agpforum.org for AGP information.
WI-2Pa