Dram Timing Settings - JETWAY 845GVFC User Manual

System BIOS Cacheable
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 At 15M-16M
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.
Delay Transaction
The chipset has an embedded 32-bit posted write buffer to support delay transactions cycles.
Select Enabled to support compliance with PCI specification version 2.1. The settings are:
Enabled and Disabled.
AGP Transfer Mode
In this item you can select AGP transfer mode Auto/4X/1X the Default setting is Auto.

3-6-1 DRAM Timing Settings

CMOS Setup Utility – Copyright(C) 1984-2003 Award Software
Auto Configuration
SDRAM CAS Latency Time
SDRAM Cycle Time
SDRAM RAS# to CAS# Delay
SDRAM RAS# Precharge Time
↑ ↓ → ←
Move Enter:Select +/-/PU/PD:Value F10:Save ESC:Exit
F5:Previous Values
SDRAM CAS Latency Time
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.
Note: Change these settings only if you are familiar with the chipset.
SDRAM RAS# to CAS# Delay
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, 3T and 4T.
SDRAM RAS# Precharge Time
DRAM Timing Settings
Standard
2.5
7
3
3
F6:Optimized Defaults
24
Item Help
Menu Level >>
F1:General Help
F7:Standard Defaults