Intel DZ77RE-75K

Intel DZ77GA-70K / DZ77RE-75K Desktop Board Performance Tuning Guide
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Figure 3.8. Memory Configuration Screen
3.6.5.3 Determining Memory Frequency
Increasing the host clock frequency will increase the memory speed, in addition to the
processor frequency. Note that the memory is not run directly from the host clock.
The memory clock frequency is generated by the processor using input from the host
clock signal received from the Intel Z77 PCH. The default memory clock frequency
runs at 133.3 MHz. Increasing the system clock frequency affects the memory
frequency according to the following formula:
Memory frequency = (memory multiplier) * (percent increase in host clock) *
(133.3 MHz)
Example: If the host clock frequency was increased by 1% and a multiplier of 8 was
being used then the new memory frequency would be (8) * (1.01) * (133.3 MHz) =
1077 MHz
For the default 133.3 MHz memory clock, the resulting memory frequency with various
multipliers is shown in Table 3-2.