Dram Timing Settings - JETWAY P4MDMR7A User Manual

Selecting Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in
better system performance. However, if any program writes to this memory area, a system
error may result. The settings are: Enabled and Disabled.
Video RAM Cacheable
Select Enabled allows caching of the video BIOS, resulting in better system performance.
However, if any program writes to this memory area, a system error may result. The settings
are: Enabled and Disabled.
Memory Hole
You can reserve this area of system memory for ISA adapter ROM. When this area is
reserved, it cannot be cached. The user information of peripherals that need to use this area of
system memory usually discusses their memory requirements. The settings are: Enabled and
Disabled.

3-6-1 DRAM Timing Settings

CMOS Setup Utility – Copyright(C) 1984-2003 Award Software
Auto Configuration
RAS Active Time
RAS Precharge Time
RAS to CAS Delay
CAS Latency
Bank Interleave
DRAM Command Rate
↑↓→← Move Enter:Select +/-/PU/PD:Value F10:Save ESC:Exit
F5:Previous Values
RAS Active Time
This field let's you insert a timing delay between the CAS and RAS strobe signals, used when
DRAM is written to, read from, or refreshed. Fast gives faster performance; and Slow gives
more stable performance. This field applies only when synchronous DRAM is installed in the
system. The settings are: 2T and 3T.
RAS Precharge Time
If an insufficient number of cycles is allowed for the RAS to accumulate its charge before
DRAM refresh, the refresh may be incomplete and the DRAM may fail to retain date. Fast
gives faster performance; and Slow gives more stable performance. This field applies only
when synchronous DRAM is installed in the system. The settings are: 2T and 3T.
CAS Latency
When synchronous DRAM is installed, the number of clock cycles of CAS latency depends
on the DRAM timing. The settings are: 2T and 2.5T.
3-6-2 AGP Timing Settings
DRAM Timing Settings
Standard
6T
3T
3T
2.5T
Disabled
2T Command
F6:Optimized Defaults
25
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F1:General Help
F7:Standard Defaults