Running all cores at turbo boost frequency.

KHADER87

Honorable
Feb 25, 2015
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10,680
Hi,
I have i7 4790 on asus b85m-g motherboard.

I read couple of threads where people managed to overclock non k cpu on non z boards, or atleast have all cores run at max turbo boost which is 4.00ghz, on my situation i can only run 4 cores at 3.8ghz. I tried all bios available with no luck except first bios cuz asus seems to have blocked it to be used.

Is there another way? Bios version? Or how to upload the first relased bios and avoid error message due to unspportef downgrade of bios.
 
Solution
Intel removed the ability for non-z87 chipset boards to multiplier overclock K processors in microcode sometime in July 2013.

Of course non-K Haswell processors cannot be multiplier overclocked at all. Sandy and Ivy Bridge had allowed up to 400MHz overclock on non-K but this was removed for Haswell like yours.

As your non-K i7 has Turbo, it was technically possible for ASUS to implement all-core Turbo (in ASUS-speak this is called multicore enhancement) in any BIOS revision regardless of microcodes but they probably chose not to do this except in z87 boards to avoid offending their supplier Intel.

In short, that first release BIOS you are after probably only allows overclocking K processors, which is not what you are...
MERGED QUESTION
Question from KHADER87 : "BCLK unlock on Asus b85m-g"

Hi,

I saw threads were people used bclk on the same board to lock all cores at max turbo boost frequency, 4.00ghz for my i7 4790, which i could only lock them at 3.8ghz although i changed all cores to 40 multipliers.

Any thoughts, bios version maybe?
 
Intel removed the ability for non-z87 chipset boards to multiplier overclock K processors in microcode sometime in July 2013.

Of course non-K Haswell processors cannot be multiplier overclocked at all. Sandy and Ivy Bridge had allowed up to 400MHz overclock on non-K but this was removed for Haswell like yours.

As your non-K i7 has Turbo, it was technically possible for ASUS to implement all-core Turbo (in ASUS-speak this is called multicore enhancement) in any BIOS revision regardless of microcodes but they probably chose not to do this except in z87 boards to avoid offending their supplier Intel.

In short, that first release BIOS you are after probably only allows overclocking K processors, which is not what you are looking for.
 
Solution
MERGED QUESTION
Question from KHADER87 : "Increasing Core Voltage on Same Core Frequency"





 
MERGED QUESTION
Question from KHADER87 : "Unable to downgrade Bios"





 

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