ASROCK 939N68PV-GLAN User Manual page 39

Processor Multiplier
This item will show when "Multiplier/Voltage Change" is set to [Manual];
otherwise, it will be hidden. The range of the value depends on the CPU
you adopt on this motherboard. However, for system stability, it is not
recommended to adjust the value of this item.
Processor Voltage
This item will show when "Multiplier/Voltage Change" is set to [Manual];
otherwise, it will be hidden. The range of the value depends on the CPU
you adopt on this motherboard. However, for safety and system stability,
it is not recommended to adjust the value of this item.
Memory Clock
This item can be set by the code using [Auto]. You can set one of the
standard values as listed: [133MHz (DDR266)], [166MHz (DDR333)] and
[200MHz (DDR400)].
Flexibility Option
The default value of this option is [Disabled]. It will allow better tolerance for
memory compatibility when it is set to [Enabled].
CAS Latency (CL)
Use this item to adjust the means of memory accessing. Configuration
options: [Auto], [2T], [2.5T] and [3T]. The default value is [Auto].
TRAS
Use this to adjust TRAS values. Configuration options: [Auto], [5T] to [15T].
The default value is [Auto].
TRP
Use this to adjust TRP values. Configuration options: [Auto], [2T], [3T], [4T],
[5T] and [6T]. The default value is [Auto].
TRCD
Use this to adjust TRCD values. Configuration options: [Auto], [2T], [3T], [4T],
[5T] and [6T]. The default value is [Auto].
TRRD
Use this to adjust TRRD values. Configuration options: [Auto], [2T], [3T] and
[4T]. The default value is [Auto].
TRC
Use this to adjust TRC values. Configuration options: [Auto], [7T] to [21T]. The
default value is [Auto].
TREF
Use this to adjust TREF values. Configuration options: [Auto], [15.6us],
[7.8us] and [3.9us]. The default value is [Auto].
MA Timing
Use this to adjust values for MA timing. Configuration options: [Auto], [2T] and
[1T]. The default value is [Auto].
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