i7-4790K Core voltage varying up to 1.2680V, higher than load voltage (1.1650V)

Spip

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Jul 1, 2008
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Hello,


When testing my system, I noticed a somewhat odd behaviour:

  • - Under "stress", the CPU core voltage remains dead stable at 1.1650V
    - Outside of benchmarks, and while idling (<5%) CPU core voltage changes alot but goes up to 1.2680V
Which seems a bit high to me, especially since it's at very low cpu utilization...

All BIOS settings are mostly at default: No OC, no XMP. All power savings features are on (Speedstep, C-states). Turbo mode is enabled, with default rules. No voltage offset.

Asus utilities are installed and running, but I only use those to monitor.

This is on a Z97-Deluxe board.


Thanks in advance.
 

Spip

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Jul 1, 2008
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Seasonic G750. Checked with AIDA64 and voltages to the rails (3.3, 5 and 12) are _very_ stable.

 

Baralis

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Jun 10, 2010
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Asus motherboards seem to have some strange voltage habits regarding these newer generation Intel chips. I have an I7 4770K that I have had Oced to 4.1 with a manual voltage setting of 1.130. I ran every stress test and program in my arsenal and I was rock stable at 1.130 however if I set that same clock speed on adaptive voltage my voltage will randomly go as high as 1.260 for a split second with only a light load. It makes no sense that the MB/cpu would call for that much voltage. I personally think it is just something wonky with Asus boards.