Configuring the BIOS
47
¾
Expert
Use the
Page Up
and
Page Down
keys to select
Expert
. When Expert
is selected, all timing categories are enabled for manual input. Note that
you should set the value to Optimal to use the manufacturers’
recommended values.
ª
tCL
: CAS# latency (options are 1 through 6).
ª
tRDC
: RAS#-to-CAS# Delay for Read/Write commands to the
same bank (options are 1 through 7).
ª
tRP
: Row Precharge time. This is the Precharge-to-Active or Auto-
to-Refresh of the same bank (options are 1 through 7).
ª
tRAS
: This is the minimum RAS# active time (options are 1 through
31).
ª
Command Per Clock
: This is the command timing setting on a per
clock unit basis (options are 1T and 2T).
ª
tRRD
: RAS#-to-RAS# delay of different banks (options are 1
through 15).
ª
tRC
: RAS#-to-RAS# or auto refresh time of the same bank (options
are 1 through 31).
ª
tWR
: The Write recovery time (options are 2 through 7).
ª
tWTR
: This is the minimum write-to-read delay with the same chip
selected (options are 1 through 10).
ª
tREF
: This is the DRAM refresh rate (options are
Auto
,
7.8uS
, and
3.9uS
).
Parameters
Settings Current Value
Memory Timing Setting
[
Expert
]
tCL (CAS Latency)
[Auto(5)]
5
tRDC
[Auto(7)]
5
tRP
[Auto(7)]
5
tRAS
[Auto(23)]
18
Command Per Clock (CDM)
[Auto(2T)]
1T
** Advanced Memory Settings **
tRRD
[Auto(4)]
3
tRC
[Auto(28)]
22
tWR
[Auto(7)]
5
tWTR
[Auto(10)]
9
tREF
[Auto]
6.1uS