Determining Memory Frequency; Memory Multipliers - Intel DP55KG Performance Tuning Manual

®
Intel Desktop Board DP55KG and Intel
Setup Option
Note: All multiplier values listed below are applied to the single 133 MHz
(default) host clock.
tRC
tFAW
Memory Voltage
Uncore Voltage
Override
Command Rate
Note: For each of the timings, except the multipliers, the lower the number, the higher the
performance and the less stable the system may become.

5.3. Determining Memory Frequency

Over all, memory frequency can easily be determined by multiplying the host clock frequency
(default is 133 MHz) by the Memory Multipliers shown in Table 3.
Multiplier
6
8
10
12
Increasing the host clock will increase the memory speed as well.
Note: The Intel Core i7-800 and Intel Core i5-700 processor series support only even
multipliers.
®
Desktop Board DP55SB Extreme Series
Performance Tuning Guide
Memory Performance Options
Row Cycle Time: The minimum time interval
between successive ACTIVE commands to the same
bank.
Four Active Window – Period of time before the fifth
successive ACTIVE command to a new memory Bank
can be issued.
Changes the memory voltage.
Allows the CPU Uncore voltage to be adjusted. (A
good starting Voltage for high frequency operation is
setting the Uncore Voltage to 1.30 V).
The amount of time that commands can be issued.
Table 3. Memory Multipliers
BCLK (MHz)
133
133
133
133
Description
Resulting Memory
Frequency (MHz)
800
1066
1333
1600
21