MSI 848P Neo-V Series User Manual page 45

MS-6788 ATX Mainboard
RAS# Precharge
This item controls the number of cycles for Row Address Strobe (RAS) to
be allowed to precharge. If insufficient time is allowed for the RAS to
accumulate its charge before DRAM refresh, refresh may be incomplete
and DRAM may fail to retain data. This item applies only when synchronous
DRAM is installed in the system. Available settings: [2 Clocks], [3 Clocks], [4
Clocks].
RAS# to CAS# Delay
When DRAM is refreshed, both rows and columns are addressed
separately. This setup item allows you to determine the timing of the tran-
sition from RAS (row address strobe) to CAS (column address strobe).
The less the clock cycles, the faster the DRAM performance. Setting options:
[2 Clocks], [3 Clocks], [4 Clocks].
Precharge Delay
The field specifies the idle cycles before precharging an idle bank. Settings:
[5 Clocks], [6 Clocks], [7 Clocks], [8 Clocks].
Burst Length
This setting allows you to set the size of Burst-Length for DRAM. Bursting
feature is a technique that DRAM itself predicts the address of the next
memory location to be accessed after the first address is accessed. To
use the feature, you need to define the burst length, which is the actual
length of burst plus the starting address and allows internal address coun-
ter to properly generate the next memory location. The bigger the size, the
faster the DRAM performance. Settings: [4], [8].
AGP Aperture Size (MB)
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 for-
warded 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].
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