IBT Technologies IB791 User Manual page 39

DRAM Timing
This option refers to the method by which the DRAM timing is selected.
The default is By SPD.
DRAM CAS Latency
This is the period between when the chipset requests data from memory
and when the memory is ready to send the data across the bus.
Bank Interleave
This decides how multiple memory modules communicate. It will only
make a difference if you have more than one memory module.
Precharge to Active(Trp)
The amount of time from a bank precharge request to when it can be
activated.
Active to Precharge(Tras)
The Active to Precharge timing controls the length of the delay between
the activation and precharge commands – the length of time after
activation can the access cycle be started again.
Active to CMD(Trcd)
This is the time between a row access request and a column access
request.
DRAM Command Rate
This is the time to wait after a chip select before activate and read can be
started.
AGP & P2P Bridge Control
The fields related to AGP & P2P Bridge Control and their respective
default settings include AGP Aperture Size (64M), AGP Mode (2X),
AGP Driving Control (Auto), AGP Driving Value (DA), AGP Fast
Write (Disabled), AGP Master 1 WS Write (Disabled) and AGP Master
1 WS Read (Disabled).
AGP Aperture Size
The field sets aperture size of the graphics. 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. The default setting is 64M.
AGP Driving Control
This is the period between when the chipset requests data from memory
and when the memory is ready to send the data across the bus.
AGP Driving Value
This decides how multiple memory modules communicate. It will only
make a difference if you have more than one memory module.
AGP Fast Write
This accelerates memory write transactions from the chipset to the AGP
device.
AGP Master 1 WS Write
When enabled, this changes the default from a 2ws to a 1ws which
will increase AGP Writing.
IB791 User' s Manual
BIOS SETUP
35