MSI MS-6380 User Manual page 65

SPD
When the installed CPU is 100MHz, this field has three setting options:
HCLK, HCLK+33 and SPD. When the installed one is 133MHz, the three
setting options will become HCLK, HCLK-33 and SPD.
CAS# Latency
This controls the timing delay (in clock cycles) before SDRAM starts a read
command after receiving it. Settings: 2 and 3. 2 increases the system
performance while 3 gives more stable performance.
Row Precharge Time
This setting 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. Settings: 2T and 3T.
RAS Pulse Width
This setting allows you to select the number of clock cycles allotted for the
RAS pulse width, according to DRAM specifications. The less the clock
cycles, the faster the DRAM performance. Settings: 6T and 5T.
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
transition from RAS (row address strobe) to CAS (column address strobe).
The less the clock cycles, the faster the DRAM performance. Settings: 3T
and 2T.
Bank Interleave
This field selects 2-bank or 4-bank interleave for the installed SDRAM.
Disable the function if 16MB SDRAM is installed. Settings: Disabled, 2-
DRAM clock will be 100MH
SPD will set the clock frequency by reading the
contents of the SPD device.
3-13
AMI BIOS Setup
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