MSI X99S MPOWER Overclocking Guide - Manual (Page 4)

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CPU Base
Clock Strap
CPU Ratio
Ring Ratio
GT Ratio
CPU PCIE PLL
& Filter PLL
Manually adjusts base
clock ratio strap. Users
who do not like automatic
tuning for the CPU base
clock can manually tune
individual items from this
option. After adjusting
the CPU base ratio, the
memory frequency will be
changed automatically.
It is not recommended
to adjust this option. MSI
BIOS will optimize the
setting automatically.
Ring, the CPU Cache called by Intel XTU, is an interface connecting
to each circuit inside the Haswell CPU. To adjust Ring Ratio would
have changed the ability and performance of CPU. MSI recommend
you not to adjust Ring Ratio higher than CPU Ratio.
It is for adjusting the frequency of the CPU built-in graphic chipset
(iGPU). Increasing the setting value will help improve the game
fluency. Each increment in GT increases frequency by 50MHz.
Please remember to increase GT voltage as the frequency
increases.
These features are
PLL related settings
that may affect
the overclocking
potential of the CPU
core. However, MSI
has already helped
overclockers by
automatically selecting
the most optimal
settings; therefore
these 2 settings should
not be necessary in
normal overclocking.
Manual adjusts CPU ratio. Large range adjustments are available
only on the K CPUs. This option will not change memory frequency.
Adjusting the CPU Ratio is the fastest way of overclocking the CPU
frequency. Generally, it can be accomplished simply by increasing
the CPU Core Voltage. In cases where the system becomes
unstable due to overheating, users may consider increasing the
VCCIN Voltage.