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Question regarding ''Safe 24/7'' voltages for 12th/13th gen

arlicht
Level 9

Hey guys,

Just wanted to know your opinions and maybe @Shamino  recommendations regarding safe 24/7 voltages for 12th/13th gen (Vcore, VCCSA, IVR TX VDDQ, IMC etc..)

I use G.Skill QVL verified 6400MHz 32x2GB RAM kit F5-6400J3239G32GX2-TZ5RK and I found that my Z790-E mobo Auto voltages are:

VCCSA: 1.3v, IMC: 1.4v, IVR TX VDDQ: 1.4v

I set those manually to: VCCSA: 1.2v, IMC: 1.35v, IVR TX VDDQ: 1.35v

I would like to know what voltages are you guys using for those RAM speeds and what are considered ''24/7 safe''

My specs:

ROG Strix Z790-E, 13900KS, 64GB RAM, RTX 3070, Thermal Grizzly contact frame, Arctic Liquid Freezer II 420 aio

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1 ACCEPTED SOLUTION

Accepted Solutions

Silent_Scone
Super Moderator

Is there a particular voltage you're curious about, or all of them? None of those values are an issue.

VCore - general rule of thumb don't exceed 2x stock TDP(w)

Memory Controller Voltage - for 8400MT+ users are applying  >1.45v with no reports of degradation.

TX VDDQ auto rules should follow VDDQ - if the system is stable, there is, there is no need to adjust manually

VCCSA most 13th-gen CPUs will be comfortable below 1.3v.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

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3 REPLIES 3

Silent_Scone
Super Moderator

Is there a particular voltage you're curious about, or all of them? None of those values are an issue.

VCore - general rule of thumb don't exceed 2x stock TDP(w)

Memory Controller Voltage - for 8400MT+ users are applying  >1.45v with no reports of degradation.

TX VDDQ auto rules should follow VDDQ - if the system is stable, there is, there is no need to adjust manually

VCCSA most 13th-gen CPUs will be comfortable below 1.3v.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

I was mostly curious about TX VDDQ, IMC and VCCSA ones. How I understand Vcore should be fine till 1.4-1.45v.

Mostly TX VDDQ and IMC 1.4v if it is safe?

Those values are fine, yes. A reasonable CPU should be fine with less than 1.4v  Memory Controller Voltage. There should be no need to run VCCSA that high, especially at 6400MT.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090