Overclocking 4820K isn't registering.....

oxf77

oxf77

oxf77

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15 Nov 2011
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Don't laugh- but overclocking the dual cores was SO much easier than the X79. I'd go in to the bios, increase either the multiplier, frequency and vcore and save my changes. Upon restarting the POST would recognise the overclock.

However, Ive now moved to X79. I have Asus P9X79 and an i7 4820K. I go in to the BIOS, go to advanced settings, go to the overclock section- I set the "multiplier" to 100, the frequency to 40 for each core (all the same). I have increased my vcore to 1.4v. At the top it says my targeted turbo speed is 4GHz- correct. However, when I save my changes and restart the machine its still running at 3.7GHz. The only change which materialised is the increase in vcore.

Could somebody please help. I have looked at online guides and disabled all the power-savy things on the CPU but I must be missing something.....
 
my 3770k overclock doesn't register in the post screen either. It does, however, register in windows when running CPUZ or other monitoring software and the system is at full load.

I've always assumed that this is because the overclocking is done by increasing the 'boost/turbo' multiplier and this isn't activated at initial post.

Does your overclock show in Windows?
 
Can you post a detailed summary of your settings or take some photos? are you using CPU-Z to read clockspeed? Windows will just show 3.7ghz still that's normal.
 
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I had the same problem with it not sticking etc (as did a few other people I spoke to online) and was told to set the strap to 125 then overclock that way. :)
 
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OLDPHART said:
Hi, when you change Bios settings say 1.35v to 1.40v hit enter to save the setting.
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It wasn't because I didn't save settings- because the vcore change did show :p

(thanks though- because it is a valid point you make)

To everyone else: Windows and Cpu-z were also showing 3.7GHz. However, I am just going to try the above of setting the strap to 125 and then trying. Will let you know in a few mins.

(ps apologies for the late reply, had to dash off!)
 
Adam_101 said:
I had the same problem with it not sticking etc (as did a few other people I spoke to online) and was told to set the strap to 125 then overclock that way. :)
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Hey it worked! In CPU-z it nowsays 4374MHz :D

Now all I need to do is turn off this nasty power-saving stuff!
 
I've not actually found the power saving stuff hinders any overclock below ~5GHz on the 4820K and is quite useful if your PC spends a lot of time not using the CPU heavily - general desktop stuff my PC draws from the wall between 76watt and 130watt with it on compared to instantly 180watt minimum with it off. (Actual figures may be slightly different as I wasn't taking exact notes of them).
 
You are probably changing what the CPU should turbo to as opposed to to just setting the stock multiplier higher, try changing the multiplier in the same screen where the CPU settings are.
 
mmj_uk said:
You are probably changing what the CPU should turbo to as opposed to to just setting the stock multiplier higher, try changing the multiplier in the same screen where the CPU settings are.
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I changed the strap to 125, locked all cores at same speed and then entered 36, 37, 38 etc. I also turned off the speedstep.

Were you suggesting I do something different?

Btw have hit a brickwall at 4.7GHz :( With a H100i cooler i'm abit disappointed!
 
oxf77 said:
I changed the strap to 125, locked all cores at same speed and then entered 36, 37, 38 etc. I also turned off the speedstep.

Were you suggesting I do something different?
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You shouldn't need to use the strap with a K series processor and it can sometimes raise some voltages (if they are set to Auto) which wouldn't be as good long term.

Try setting strap to 100 and change the multiplier in the CPU settings screen where the intel speedstep/turbo core settings are.
 
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mmj_uk said:
You shouldn't need to use the strap with a K series processor and it can sometimes raise some voltages (if they are set to Auto) which wouldn't be as good long term.

Try setting strap to 100 and change the multiplier in the CPU settings screen where the intel speedstep/turbo core settings are.
Click to expand...

I thought this, but had similar problems with my OCUK system and they said to set the strap instead, I think 8pack mentions this in his guide too.:)
 
Overclocked my 4820 using x47 multiplier and setting the vcore to 1.325. 100% stable. Ran OCCT linpack 8 hrs one night on accident.

CPU is stable at:
4.8 ghz @ 1.375 vcore.
4.9 ghz @ 1.4 vcore.
5.0 ghz @ 1.45 vcore.
 
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That looks like a decent chip - while I can get 5GHz with 1.46 I need a lot of volts to get it above 4.4 :|

(EDIT: Think the problem with mine is actually more the board as vcore tends to go up in fairly big steps and droops a bit).
 
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my findings are..
4.8 ghz @ 1.32v
5.0 ghz @ 1.45v
5.1 ghz @ 1.5v (typo of 5.5 in original post sorry)

Running 24/7 @ 4.8 ghz

4820k
asrock extreme6 x79
16gb teamgroup 2400mhz
Corsair h80
 
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Glad you got it sorted, it take's 1.5v for me to get 4.8ghz lol but more than happy at 4.6ghz 1.344v[CPU-Z] with good temps for running 24/7.

Will have a go with 125 strap again now that l under stand a bit more about overclocking X79.
 
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