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Internal PLL Overvoltage - Enable or Disable?

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nezzarix

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Discussion starter · #1 ·
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.
 
Discussion starter · #3 ·
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
Click to expand...
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.
 
#4 ·
Quote:
Originally Posted by nezzarix;14322828
Ah, interesting... Just out of curiosity, is there any harm in leaving it enabled for lower frequencies?
Click to expand...
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.
 
#7 ·
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.
Click to expand...
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).
 
#8 ·
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).
Click to expand...
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?
 
#9 ·
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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Discussion starter · #10 ·
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?
Click to expand...
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.
 
#11 ·
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?
Click to expand...
Maybe.

Not to support a thread hijack, but what are the rest of your settings in the UEFI?
 
#13 ·
Quote:
Originally Posted by nezzarix;14322661
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.
Click to expand...
in my personal experience with internal PPL Voltage i would first check to see what your chip stably clocks to in my case i did not notice any differnce in enabling it other than on cold boot with it enabled it would turn off then turn it self back on but i can get to 5ghz no problem but i choose to stay @ 4.7 as i have a 6990 on the loop as well on a RX360
 
#17 ·
Quote:
Originally Posted by TwoCables;14327783
Maybe.

Not to support a thread hijack, but what are the rest of your settings in the UEFI?
Click to expand...
just to clarify my previous post. my computer freezes at the windows 7 logo at boot up when i have my internal pll overvoltage disabled. when it is enabled/auto, everything boots up fine. i thought this maybe something to think about for people who want to turn it off
biggrin.gif


2rf6n14.jpg
 
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#19 ·
Quote:
Originally Posted by Nethermir;14328115
just to clarify my previous post. my computer freezes at the windows 7 logo at boot up when i have my internal pll overvoltage disabled. when it is enabled/auto, everything boots up fine. i thought this maybe something to think about for people who want to turn it off
biggrin.gif


2rf6n14.jpg
Click to expand...
Oh, I see. Let's use the values below and then see what happens:

Ai Tweaker
  • Ai Overclock Tuner: Manual
  • BLCK/PCIE Frequency: 100.0
  • Turbo Ratio: By All Cores
  • By All Cores: 45
  • Internal PLL Voltage: Disabled
  • Memory Frequency: DDR3-1600MHz
  • DRAM Timing Control: 9-9-9-24-2N (don't change anything else)
  • EPU Power Saving MODE: Disabled

Ai Tweaker\ CPU Power Management >
  • CPU Ratio: Auto
  • Enhanced Intel SpeedStep Technology: Enabled
  • Turbo Mode: Enabled
  • Long Duration Power Limit: Auto
  • Long Duration Maintained: Auto
  • Short Duration Power Limit: Auto
  • Additional Turbo Voltage: Auto
  • Primary Plane Current Limit: Auto

Ai Tweaker (in the DIGI+ VRM section)
  • Load-Line Calibration: Ultra High
  • VRM Frequency: Manual
  • VRM Fixed Frequency Mode: 350
  • Phase Control: Extreme
  • Duty Control: Extreme
  • CPU Current Capability: 140%
  • CPU Voltage: Offset Mode
  • Offset Mode Sign: +
  • CPU Offset Voltage: 0.010V
  • DRAM Voltage: 1.5000
  • VCCSA Voltage: Auto
  • VCCIO Voltage: Auto
  • CPU PLL Voltage: Auto
  • PCH Voltage: Auto
  • CPU Spread Spectrum: Enabled


Advanced\ CPU Configuration >
  • CPU Ratio: Auto
  • Intel Adaptive Thermal Monitor: Enabled
  • Active Processor Cores: All
  • Limit CPUID Maximum: Disabled
  • Execute Disable Bit: Enabled
  • Intel Virtualization Technology: Disabled
  • Enhanced Intel SpeedStep Technology: Enabled
  • Turbo Mode: Enabled
  • CPU C1E: Enabled
  • CPU C3 Report: Auto
  • CPU C6 Report: Auto
 
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