Performance Tuning Guide

Intel

Desktop Board DP55KG and Intel

Desktop Board DP55SB Extreme Series

Table 2. Performance Memory Profiles

Setup Option Description

Memory Performance Options

Note: All multiplier values listed below are applied to the single 133 MHz

(default) host clock.

Performance Memory

Profiles

Automatic setting uses default values provided by

the memory module.

Manual mode allows the user to change each of the

settings.

If the installed memory module supports XMP, there

will be additional selections for each profile stored in

the module. Selecting a profile will populate all the

settings with those recommended by the

manufacturer.

Uncore Multiplier Sets the Uncore CPU multiplier. This is

non-adjustable for Intel Core i7 and Intel Core i5

processors. It is shown for information purposes.

Memory Multiplier Sets the memory multiplier provided by the on die

memory controller of the installed processor.

tCL CAS Latency: The amount of time in cycles between

sending a read command and the time to act on it.

tRCD RAS to CAS Delay: The amount of time in cycles for

issuing an active command and the read/write

commands.

tRP RAS Precharge Time: This is the minimum time

between active commands and the read/writes of the

next bank on the memory module.

tRASmin Minimum RAS Active Time: The amount of time

between a row being activated by precharge and

deactivated.

tRFC RAS Refresh Cycle Timing: This determines the

amount of cycles to refresh a row on a memory bank.

tRRD RAS to RAS Delay: The amount of cycles that it

takes to activate the next bank of memory.

tWR Write Recover Time: The amount of cycles that are

required after a valid write operation and precharge.

tWTR Write to Read Delay: The amount of cycles required

between a valid write command and the next read

command.

tRTP Read to Precharge Delay: The minimum delay prior

to when a Read can occur.