ASROCK N68-GS UCC User Manual page 37

CPU Frequency Multiplier
This option appears only when you adopt Phenom CPU. However, for
safety and system stability, it is not recommended to adjust the value of this
item.
NB Frequency Multiplier
This option appears only when you adopt Phenom CPU. 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: [200MHz (DDRII400)], [266MHz (DDRII533)],
[333MHz (DDRII667)] and [400MHz (DDRII800)]. If you adopt Phenom CPU,
there is one more option: [533MHz (DDRII1066)].
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], [3CLK], [4CLK], [5CLK] and [6CLK]. The default value is
[Auto].
TRCD
Use this to adjust TRCD values. Configuration options: [Auto], [3CLK], [4CLK],
[5CLK] and [6CLK]. The default value is [Auto].
TRP
Use this to adjust TRP values. Configuration options: [Auto], [3CLK], [4CLK],
[5CLK] and [6CLK]. The default value is [Auto].
TRTP
Use this to adjust TRTP values. Configuration options: [Auto], [2-4CLK] and
[3-5CLK]. The default value is [Auto].
TRAS
Use this to adjust TRAS values. Configuration options: [Auto], [5CLK] to
[18CLK]. The default value is [Auto].
TRRD
Use this to adjust TRRD values. Configuration options: [Auto], [2CLK], [3CLK],
[4CLK] and [5CLK]. The default value is [Auto].
TRC
Use this to adjust TRC values. Configuration options: [11CLK] to [26CLK]. The
default value is [Auto].
TWR
Use this to adjust TWR values. Configuration options: [Auto], [3CLK], [4CLK],
[5CLK] and [6CLK]. The default value is [Auto].
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