MSI X99S MPOWER Overclocking Guide - Manual (Page 2)

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Memory Ratio
Intel 9 Series chip OC Ability Comparison
CPU Base Clock
Intel 9 Series system Frequency Formula
Same with the Z87, the Z97 has added the Memory Ratio to the memory system, with
the highest at DDR3-3200(MSI Spec). Along with the flexible base clock combination, it
is easier to configure different memory frequencies on the Z97 than the Z87 platform.
Same with the Z87 Platform. Intel has included the “ratio” concept in the base clock
of the Z97 this time, as the architecture of the Haswell is “CPU Base Clock=DMI/
PEG Clock X BCLK Ratio”. Although this allows users to adjust the CPU with greater
flexibility, the whole thing becomes more complex and complicated overall. In order to
make OC easier for most users, MSI 9 series platform BIOS can automatically integrate
DMI/PEG Clock and BCLK Ratio. This way, overclockers only need to adjust the CPU
Base Clock for the BIOS to automatically tune the DMI/PEG Clock and BCLK Ratio.
This makes CPU Base Clock OC simpler on the Intel Z97 platform.
Intel 9 Series Platform OC Ability Comparison
CPU Frequency = CPU Base Clock X CPU Ratio
CPU Base Clock = DMI/PEG Clock X BCLK Ratio
GPU Frequency= BCLK /2 x GT Ratio
RAM Frequency = CPU Base Clock x 100/133MHz x DDR Ratio
CPU Ratio
Base Clock
RAM
GPU
Ο=Use K-SKU CPU Δ= Adjustable at limited range.
Ο
Z97 B85 H97 / H81
Δ Δ
Ο Δ Δ
Ο Δ Δ
Ο Ο Ο