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Is the 0x129 VID limit 1.550V or 1.555V?

Gessler
New Contributor I
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Multiple cores on my 14700K are hitting a peak VID of 1.555V under gaming loads.

 

Was just wondering if that is still within the "1.55V" limit imposed by the 0x129 microcode as depending on how the last decimal is calculated you can either have 1.55 defined as anything at or above 1.550 all the way up to 1.559, or as anything above 1.545 but at or below 1.555 (if you're rounding off to the closest round figure on the higher decimal, some programs like Corsair iCUE do this), or you can simply say the limit is a hard 1.550V and even a single mv above that is in breach.

 

Any literature/help on this?

 

My motherboard is a Asus ROG STRIX Z790-E Gaming WiFi II and I'm on 1503 BIOS (latest) with Intel Default Settings profile.

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VARADHARAJAN
Valued Contributor I
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@Gessler 

You can undervolt  14700k  see youtube video , you may get some advice 

(5) Undervolt your i7 14700K for more FPS and Lower Temperature! - YouTube

 

Also read this page 

Undervolt advice for 14700k : r/intel (reddit.com)

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SmartOne_2000
New Contributor II
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Why not just set your processor to 1.450 or 1.500v and call it a day?

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pressed_for_time
Valued Contributor I
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The issue here is VID which is the voltage requested by each P-core and E-core. But whatever the VID values are, only a single voltage is supplied to each core, this is Vcore. Microcode 0x129 is intended to restrict VID voltage to 1.55 and the complaint here is that it is not, as VID voltages of up to 1.555 are being seen.

Is this significant because it is the Vcore that counts. And there is no mention of Vcore voltages so presumably  they are OK. VID is not just a result of the microcode but the rest of the system including the chipset, the motherboard VRMs and even the PSU. So exact VID values of 1.55 particularly under gaming load are probably unlikely.

And if you are running the Intel Default Settings I would not recommend varying these including undervolting or restricting CPU voltage.

 

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