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Why wouldn't you use 'Auto' for Core Voltage?

post #1 of 4
Thread Starter 
I've been using Auto for a few months, and at idle it'd show 1.07 Volts at the BIOS screen. This is with C-states disabled and EIST in turn disabled because C-States is disabled, but I disable EIST just o make sure.

I've been told to manually set the voltage. I just feel that manually setting the voltage would degrade the 4790K quicker over time IF you run a 24/7 - I try to remember to boot default clocks when not using the insane 4.9 Ghz when I need it. I can, so far, get 4.9 with 1.32 volts. 46 Uncore at 1.22 volts (manual). 'Auto' selects 1.392 for the Core voltage when at 100% load, and 1.29 voltage for the uncore. Auto selects .08 higher (roughly) for both vcore and vuncore, when I can manually run at 4.9 Ghz with 1.32 and 1.22, respectively (thus lower temps at full load).
post #2 of 4
Overvolting your CPU will reduce it's lifespan from 30 years to 29 years and 11 months! It's not an issue unless it's massive (not available in a stock bios) overvolting.

As for core volts on auto, it does same save money on electricity, but V droop can be an issue when you start reaching the limit of an overclock. Constant voltage = stability.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

Overvolting your CPU will reduce it's lifespan from 30 years to 29 years and 11 months! It's not an issue unless it's massive (not available in a stock bios) overvolting.

As for core volts on auto, it does same save money on electricity, but V droop can be an issue when you start reaching the limit of an overclock. Constant voltage = stability.
I'm using a load line calibration of 9 currently.
post #4 of 4
I use offset voltage, which still allows it to drop at idle along with the clock speed. I like to save money but have stability.

I cannot recommend high LLC settings. You may be stable at full load using high LLC, but low load may not trigger the ramp up in voltage by the motherboard and cause instability. If you use an offset, with a moderate LLC it will have you covered at all loads.
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