Integrated Peripherals - MSI MS-6552 Manual

Chapter 3
7, 6 and 5 (clocks).
RAS# to CAS# Delay
This field allows you to set the number of cycles for a timing delay between
the CAS and RAS strobe sig nals, used when DRAM is written to, read from
or refreshed. Fast speed offers faster performance while slow speed offers
more stable performance. Setting s: 3 and 2 (clocks).
RAS# Precharge
This item controls the number of cycles for Row Address Strobe (RAS) to be
allowed to precharg e. If insufficient time is allowed for the RAS to accumu-
late its charg e 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 setting s: 3 and 2 (cloc ks).
DRAM Data Integrity Mode
Select ECC (Error-Correcting Code) or Non-ECC according to the type of
installed DRAM.
DRAM Frequency
This item allows you to set the clock frequency of the DRAM installed.
Available optio ns are: DDR= Aut o, PC200 and PC2 66
SDR= Auto, PC100 and PC133.
AGP Aperture Size (MB)
The item is used to select the size of Accelerated Graphics Port (AGP)
aperture. Aperture is a portion of PCI memory address rang e dedicated for
g raphics memory address space. Host cycles that hit the aperture rang e are
forwarded to AGP without any translation. Setting s: 4, 8, 16, 32, 64, 128
and 256.
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Integrated Peripherals

On-Chip Primary/Secondary PCI IDE
The integ rated peripheral controller contains an IDE interface with support
for two IDE channels. Choose Enabled to activate each channel separately.
IDE Primary/Secondary Master/Slave PIO
The four items allow yo u to set a PIO (Prog rammed Input/Ou tput) mod e for
each of the four IDE devices that the onboard IDE interface supports. Modes
0~4 provide increased performance. In Auto mode, BIOS automatically deter-
mines the best mode for each IDE device.
IDE Primary/Secondary Master/Slave UDMA
Ultra DMA implementation is possible only if your IDE device supports it and
your operating environment contains a DMA driver. If b oth your hard drive
and software support Ultra DMA 66/100, select Auto to enable BIOS support.
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AWARD BIOS Setup
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