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How much should I undervolt?/Help for undervolting 13700K on Asus Board/low clock speed on multicore

shadmehr79
Level 9

Hello guys, i want to undervolt my 13700k .

Short Question :How much should I undervolt? and how can i test my undervolt is stable

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mobo:tuf gaming z790 pro lastest update 0x12B Microcode

i see this guide of Buildzoid :

"Testing and Optimizing the 0x129 Microcode on the ASUS Maximus Z790 Apex Encore."

https://www.youtube.com/watch?v=XI2x2_skwSs

so here is my changes :(in Intel Default Settings(PL1/PL2=253W, 307 A)

IA VR Limit: 1400 for now( maybe 1300 later)

AC/DC Synch = Enabled

CPU LLC = LEVEL 6 (0.49 milliohms)

Tj Max = 85 C

Undervolting : Global Core SVID Voltage = adaptive mode = - 0.09000 (-90mV)

i run a prime95 Small FFTs test for a minute here is my HW info Values :

Vcore (under Load) =1.154

VID(under Load)= 1.162

Max package Temp : 88 C

Vcore max =1.252

VR VCC Current Max = 217.152 A

VID max = 1.270

Max Power Draw = 253W

and i run few loops of CB R23/R24/R20/R15 scores and temp is good (cuz CBR23 draw 220~230W) and no performance lose.(a little question here : my Core Clocks under load in CB23 Multicore go to 4750Mhz. why?! it must be 5300~5400Mhz)

so here is my main question /confusion:

#1 how much can i undervolt ?(Vcore (under Load) =1.154 is it safe/normal???!)

it seems i can undervolt till -110mV without problem but is Vcore (under Load) =1.154 considered as safe (tooo low maybe??)??????

#2 how can i stability test properly?

=== edited====

yes i know i must undervolt till edge of stability and add 5~10 mV to the value

=== edited #2====

I ran the Ycruncher pi 2.5 test. passed

SPs:

SP =88

P core SP = 98 

E core SP= 68 

TL;DW: BIOS 1503 with the 0x129 Microcode successfully limits max Vcore to 1.55V when using the intel default settings. My Patreon: https://www.patreon.com/buildzoid Teespring: https://teespring.com/stores/actually-hardcore-overclocking Bandcamp: https://machineforscreams.bandcamp.com/music My ...
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