MSI P67A-GD55 (B3) Quick Guide - Manual (Page 3)

 P67A-GD55 (B3) Overclocking Guide P67A-GD55 (B3) Overclocking Guide 
Some OC Info About New
P67 Platform
Despite design and architectural similarities between the Intel Series 60
chipsets for the brand new LGA1155 processors and the previous Series 50
chipsets for LGA1156 processors, none of them are compatible. In addition to
the integrated GPU, the Sandy Bridge is equipped with more demanding OC
restrictions. That is to say, it is less flexible than any LGA1156 processors.
OC ? You need K SKU CPU
First, Intel has restricted base clock OC of
Sandy Bridge processors, and the average
BCLK OC range is about 10%. Given that the
default BCLK of the Sandy Bridge is 100MHz,
the OC range will fall within 110MHz. When
compared with the processors of previous
versions, the range is far less. In other words,
we can only adjust the CPU ratio (multiplier)
to run OC on the Sandy Bridge processors,
and the K series processors without ratio
block will surely be the primary choice for OC
power users.
Sandy Bridge CPU OC Ability Comparison
K SKU i7 i5 i3
Base Clock
CPU Ratio
GPU Clock
Chipsets OC Limited
Apart from the range limit of processors, the design
of the Series 60 chipsets also differs. Although the
OC features of the P55 and H55 chipsets are similar
(depending on the mainboard design), it is necessary
for consumers to carefully select the Series 60 chip-
sets in order to run OC on their systems. Despite the
fact that the GPU is integrated with all Sandy Bridge
processors, users are advised to choose the K-series
processors and P67 mainbaords in order to exert the
power of OC. However, when one wants to run OC
on the GPU integrated with the processors, the H67
platforms will be the only choice. Simply speaking, it
is impossible to run GPU OC on the P67 platforms or
CPU OC on the H67 platforms.
=Adjustable at a limited range.
Sandy Bridge Platform OC Ability Comparison
P67 H67
Base Clock
CPU Ratio
GPU Clock
=Adjustable at a limited range.