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Internal PLL Overvoltage - Enable or Disable?

post #1 of 34
Thread Starter 
I've been reading a lot of overclocking guides and a lot of them seem to contradict themselves when it comes to the Internal PLL Overvoltage setting. Some claim that it should be disabled while others claim that it's good for the CPU and should be enabled/on auto. I've tested my system with both options and haven't noticed a difference in voltage, stability, or temperatures.

So... Should I have it on enabled, disabled, or on auto? All comments are welcomed smile.gif I also posted my current settings in case one of my settings is not ideal.
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post #2 of 34
It should be left disabled until you start exceeding a multiplier of roughly 48, 49, 50, etc.

That's basically it. smile.gif
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post #3 of 34
Thread Starter 
Quote:
Originally Posted by TwoCables;14322725 
It should be left disabled until you start exceeding a multiplier of roughly 48, 49, 50, etc.

That's basically it. smile.gif

Ah, interesting... Just out of curiosity, is there any harm in leaving it enabled for lower frequencies? I've also read that it's suppose to be "safer" for the CPU to have it enabled.
Edited by nezzarix - 7/23/11 at 6:51pm
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post #4 of 34
Quote:
Originally Posted by nezzarix;14322828 
Ah, interesting... Just out of curiosity, is there any harm in leaving it enabled for lower frequencies?
I don't know yet. redface.gif However, I've noticed that it's recommended to leave it disabled until it's needed. It sounds to me like it's one of those settings that is safe, but yet a last resort because there are still other things to adjust for increasing/achieving stability.
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post #5 of 34
Quote:
Originally Posted by nezzarix;14322828 
Ah, interesting... Just out of curiosity, is there any harm in leaving it enabled for lower frequencies?

you want sleep, NO SLEEP FOR YOU!
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post #6 of 34
Quote:
Originally Posted by The Viper;14327671 
you want sleep, NO SLEEP FOR YOU!
???
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post #7 of 34
Quote:
Originally Posted by nezzarix;14322828 
Ah, interesting... Just out of curiosity, is there any harm in leaving it enabled for lower frequencies? I've also read that it's suppose to be "safer" for the CPU to have it enabled.
You should disabled it. Internal PLL allows the mobo to easily up the vCore to voltages higher the 1.38 which what Intel says it's the maximum Sandy Bridge CPUs can handle before doing harm to the chip. So if you enable it, and have vCore set to Auto, expect voltages of 1.4 and higher, especially if you overclock, all of which is overkill for any clock speed under 4.5GHz (also may depends on how good of a batch you got your CPU from).
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post #8 of 34
Quote:
Originally Posted by SkullTrail;14327709 
You should disabled it. Internal PLL allows the mobo to easily up the vCore to voltages higher the 1.38 which what Intel says it's the maximum Sandy Bridge CPUs can handle before doing harm to the chip. So if you enable it, and have vCore set to Auto, expect voltages of 1.4 and higher, especially if you overclock, all of which is overkill for any clock speed under 4.5GHz (also may depends on how good of a batch you got your CPU from).
Actually, 1.512V (or it might be 1.525V) is the maximum. Furthermore, the Senior Technical Marketing Specialist for ASUS (who's name is Juan Jose and goes by "JJ") says that he recommends staying under 1.425V for 24/7 use, but exceeding it for short periods of time is fine.

MANY people with either the i5-2500K or the i7-2600K are using a vCore higher than 1.38V and are experiencing absolutely no problems.

For example: there is nothing unsafe about exceeding 1.235V to get a bigger overclock.


Edit: does Internal PLL Overvoltage really allow for a higher vCore? Are you thinking of CPU Current Capability?
Edited by TwoCables - 7/24/11 at 8:44am
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Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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It's a computer!
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Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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post #9 of 34
hmm looks like i need to read the guides again. i thought it's fine to leave it at auto. for testing purposes, i am using 4.5 ghz right now with +0.010 offset (ultra high llc). but when i load to windows, it just freezes at the windows logo. is that because i am lacking vcore?
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post #10 of 34
Thread Starter 
Quote:
Originally Posted by Nethermir;14327758 
hmm looks like i need to read the guides again. i thought it's fine to leave it at auto. for testing purposes, i am using 4.5 ghz right now with +0.010 offset (ultra high llc). but when i load to windows, it just freezes at the windows logo. is that because i am lacking vcore?

I am also running my system at 4.5Ghz. Take a look at my screenshot on the first post, I am using an offset of -0.050 which translates to 0.944v idle and 1.296v load. That seems to suffice for 4.5-4.6Ghz for me.
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