OC Help please multiplier issues

[thekeemo]

so im in the process of overclocking my i7-3820

before my core speed was 3699 mhz (100*37) now its showing 3479 

also dont worry im dropping the voltage

I have the multiplier set to 37 and the base clock at 120mhz

[Enderman]

dont touch the base clock

only the multiplier

[thekeemo]

dont touch the base clock

only the multiplier

ill try that

[ProKoN]

This guide is for OC'ing the 3820 or for anyone looking to use the Bclk to OC their CPU. 
  
Disclaimer:  Overclock at your own risk !!
 
EDIT:  Changes in some settings due to improvements in newer BIOS revisions documented at the end of this post!!
  
If you want a more modest OC (3820), up to 4.3Ghz, you can simply increase the "CPU Multiplier Setting" to 43.  This is the max multiplier that will increase your clock speed on all 4 cores. 
Those of you with unlocked chips, you can keep increasing your multiplier up to it's max or until you reach your desired clock speed. 
  
To increase the multiplier, you'll need to change the "CPU Multiplier Control" from Auto to either "Manual" or "Eleet Ratio Control".  I prefer Eleet Control.  You'll see an expanded section then where you can increase your CPU multiplier.  Your Vcore voltage is really the only other thing needed to be changed for this type of OC.  You can disable vdroop or any power saving features if you choose. 
  
If you want over 4.3 and up to about 4.5Ghz, you can start increasing the Bclk Frequency from 100 up to 105.  You may be able to get over 105, but I could not.  105 Bclk Freq x a multi of 43 will net you just over a 4.5Ghz OC. 
  
Now on to OC'ing with the Bclk and Bclk Straps. 
  
First thing to do is set your bios to the "Optimized Defaults" and re-boot back into the BIOS.  Don't make any other changes yet at this point other than any HDD specific things like Raid etc., if needed. 
  
Now on the Overclcok page, scroll down to the bottom and click "BCLK 125Mhz Quick Setting".  You'll notice back up at the top of the page that your CPU Multi Control has changed to "Eleet Ratio Control" and your two BCLK items changed to X 1.25 and 125.00Mhz.  This is what you want for a 125Mhz Bclk.  Now without making any other changes, re-boot back into the BIOS. 
  
The example I'm using for this guide from here on out is a 125Mhz Bclk with a 37 Multi for a 4.625Ghz OC. 
  
Ok.  At this point you want to go into the "Memory" page in the BIOS to set up your memory.  I use Manual settings here but I think you can use an XMP profile.  I never tested that.  The key thing to remember here is that whatever you set your Memory Frequency to, you have to multiply it by 125 to account for the Blck.  Example: A 1333Mhz Mem Freq will give you an actual mem speed of 1667Mhz.  1333 x 1.25 = 1667Mhz.  Or setting your Mem Freq to 1600 will give you 2000Mhz etc...  Now set your Timings to the Mfg'r specs or whatever you decide.  It will look something like this: 
  

 

http://forums.evga.com/BCLK-OC-Guide-For-3820-on-X79-DARK-4625Ghz-m2022631.aspx

[thekeemo]

This guide is for OC'ing the 3820 or for anyone looking to use the Bclk to OC their CPU. 

  

Disclaimer:  Overclock at your own risk !!

 

EDIT:  Changes in some settings due to improvements in newer BIOS revisions documented at the end of this post!!

  

If you want a more modest OC (3820), up to 4.3Ghz, you can simply increase the "CPU Multiplier Setting" to 43.  This is the max multiplier that will increase your clock speed on all 4 cores. 

Those of you with unlocked chips, you can keep increasing your multiplier up to it's max or until you reach your desired clock speed. 

  

To increase the multiplier, you'll need to change the "CPU Multiplier Control" from Auto to either "Manual" or "Eleet Ratio Control".  I prefer Eleet Control.  You'll see an expanded section then where you can increase your CPU multiplier.  Your Vcore voltage is really the only other thing needed to be changed for this type of OC.  You can disable vdroop or any power saving features if you choose. 

  

If you want over 4.3 and up to about 4.5Ghz, you can start increasing the Bclk Frequency from 100 up to 105.  You may be able to get over 105, but I could not.  105 Bclk Freq x a multi of 43 will net you just over a 4.5Ghz OC. 

  

Now on to OC'ing with the Bclk and Bclk Straps. 

  

First thing to do is set your bios to the "Optimized Defaults" and re-boot back into the BIOS.  Don't make any other changes yet at this point other than any HDD specific things like Raid etc., if needed. 

  

Now on the Overclcok page, scroll down to the bottom and click "BCLK 125Mhz Quick Setting".  You'll notice back up at the top of the page that your CPU Multi Control has changed to "Eleet Ratio Control" and your two BCLK items changed to X 1.25 and 125.00Mhz.  This is what you want for a 125Mhz Bclk.  Now without making any other changes, re-boot back into the BIOS. 

  

The example I'm using for this guide from here on out is a 125Mhz Bclk with a 37 Multi for a 4.625Ghz OC. 

  

Ok.  At this point you want to go into the "Memory" page in the BIOS to set up your memory.  I use Manual settings here but I think you can use an XMP profile.  I never tested that.  The key thing to remember here is that whatever you set your Memory Frequency to, you have to multiply it by 125 to account for the Blck.  Example: A 1333Mhz Mem Freq will give you an actual mem speed of 1667Mhz.  1333 x 1.25 = 1667Mhz.  Or setting your Mem Freq to 1600 will give you 2000Mhz etc...  Now set your Timings to the Mfg'r specs or whatever you decide.  It will look something like this: 

  

 

http://forums.evga.com/BCLK-OC-Guide-For-3820-on-X79-DARK-4625Ghz-m2022631.aspx

 

 

dont touch the base clock

only the multiplier

a combo of these worked thanks alot. should I turn off turbo boost?

[Jumper118]

a combo of these worked thanks alot. should I turn off turbo boost?

no because i dont think it works at all if you turn off turbo boost

[thekeemo]

no because i dont think it works at all if you turn off turbo boost

I turned it off it better now

[Jumper118]

I turned it off it better now

ok then. try turning off any c states and try a bit of base clock as well now try 105 to start with

[thekeemo]

ok then. try turning off any c states and try a bit of base clock as well now try 105 to start with

C states?

im fine with 4.3 ghz

[Jumper118]

C states?

im fine with 4.3 ghz

yes. they make the cpu downclock. 

[thekeemo]

yes. they make the cpu downclock. 

when not in use

[Jumper118]

when not in use

yes, but in the short period of time it takes your cpu to boost up to speed you loose efficiency.  

[thekeemo]

yes, but in the short period of time it takes your cpu to boost up to speed you loose efficiency.  

update it does NOT like 105mhz. thank you dual bios. I had to revert to the other one which actually has more features even though its an older version of the bios. also is easier to OC with