Enhanced BCLK Capabilities

Key Differences Between Generations

 

Intel® Core™ i7

3rd Gen Intel Core

Next Gen Intel

 

processors on

processors on

Haswell

 

LGA2011

LGA1155

Microarchitecture

Coarse

BCLK multipliers

None

Select CPU PEG/DMI

Adjustment

{1.0,1.25,1.67} input

 

ratios of {5:5,5:4,5:3}

 

to CPU

 

depending on what

 

CPU adjusts PEG/DMI

 

clock frequency you

 

ratios {5:5,5:4,5:3}

 

request from PCH

 

based on BCLK multi

 

 

Fine

External clock device

PCH output

PCH output ± 5-7%

 

output adjustment ± 5-

adjustment ± 5-7%

around frequency

 

7% over nominal

over nominal 100MHz

points 100MHz,

 

100MHz

 

125MHz, 167MHz

Range Peak

168 MHz

116.95 MHz

>167 MHz

Observed †

(non-continuous)

 

(non-continuous)

 

 

 

 

4th Generation Intel Core processors deliver BCLK overclocking experience consistent with current generation high-end platforms based on LGA2011

† This data was collected from overclocking forums and should be considered approximate for illustrative purposes only.

21