CPU Voltage Overclock help.

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Seren8989

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Mar 2, 2017
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I am trying to overclock my i5-3570K, for a test i put it at 4.0GHZ and set the Voltage in bios at 1.15

I then tested it on Prime95 and ran HWINFO64.

It shows my Voltage at 1.295 at 4.0

Why does it go over the set 1.15 voltage i had set in bios?




My PC is

i53570K
MSI GD65 Z77
8GB GSKILL ARES 1600
750W 80+ GOLD
MSI GTX560
 
Solution
n0ns3ns3
fixed voltage is not a problem.
on low frequencies, the power consumption (and heat generation) is much lower.
Some people use fixed voltage and fixed frequency for their 24/7 overclocks.
it's just few $ a year on electricity bill.
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Seren8989

Prominent
Mar 2, 2017
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Ok so i was actually looking at VID and after my research, apparently VID is like the number that gets set at factory preset. And it's unchangeable, somewhat of a guideline for the CPU. But once you Overclock and manually set in CPU Voltage it overrides it.

So to see real CPU voltage you can run CPU-Z. I did and i saw the voltage was inline with my BIOS setting.


Now also, my Motherboard does not allow to set Offset settings, so i only have 2 ways to run my CPU overclock. I can only have the voltage run at a fixed level 24/7, or have it Overclock with Turbo Boost.

The thing with that is that is that i don't get the advantage of running my CPU at a lower fixed voltage while still having it ramp down during use. Because my MB does not support that feature. Which sucks, because then i have to either find a custom 24/7 Voltage at whatever GHZ i choose.Or let the CPU Boost decide the voltage with turbo boost.

Bummer, so i won't be able achieve higher clocks unless i run my voltage at fixed rates.
 
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n0ns3ns3

n0ns3ns3

Illustrious
May 25, 2016
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42,715
fixed voltage is not a problem.
on low frequencies, the power consumption (and heat generation) is much lower.
Some people use fixed voltage and fixed frequency for their 24/7 overclocks.
it's just few $ a year on electricity bill.
 
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Solution
Max1s

Max1s

Distinguished
May 24, 2011
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1
19,460


So the CPU will just be drawing much lower current while idle at a fixed high voltage? What's the advantage of being able to ramp down the voltage then, if it will have to draw higher current at low voltage to have the same power consumption?
 
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n0ns3ns3

n0ns3ns3

Illustrious
May 25, 2016
8,065
4
42,715
with fixed voltage, the power draw will be still somewhat higher on idle. Sorry, I'm too lazy to explain the voltage vs current since it will take me a whole day :)
In short, higher current requires "thicker" conductive passes. Higher voltage requires "thicker" insulation.
 
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