MSI G52-MA00628 - Manual (Page 54)

Chapter 3
3-12
System Performance
The DRAM timing is controlled by the DRAM Timing Registers. The
Timings programmed into this register are dependent on the system design.
Slower rates may be required in certain system designs to support loose
layouts or slower memory. Setting options: Safe Mode, Normal Mode,
Fast Mode, Turbo Mode, Ultra Mode.
CAS Latency Setting
When synchronous DRAM is installed, the number of clock cycles of
CAS latency depends on the DRAM timing. The settings are: Auto, 2 T, 2.
5T, 3T.
DRAM Addr/Cmd Rate
This feature allows you to select the Lead-off Time Control for DRAM
Read/Write (Bit 5) and Background (Bit 4) Commands. When set to 1T,
memory read-write and background commands are issued 1 clock behind
memory address (MA) been issued. When set to Auto, the commands
and MA are issed at the same time. The settings are: Auto, 1T, 2T.
AGP Aperture Size
This setting controls just how much system RAM can be allocated to AGP for
video purposes. The aperture is a portion of the PCI memory address range
dedicated to graphics memory address space. Host cycles that hit the aperture
range are forwarded to the AGP without any translation. The option allows the
selection of an aperture size of 4MB, 8MB, 16MB, 32MB, 64MB, 128MB, and
256 MB.