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msheikh22
Journeyman III
Journeyman III

Ryzen 9 3900X vddcr cpu and vddcr soc voltage

hi everyone

i built new system with Ryzen 9 3900x and Asus rog x570 -e Motherboard. my cpu was overclocking  to 4.2 Ghz with default settings. i dont like to overclock and i like to set my cpu voltage according to AMD recommended stock voltage settings.

 

i like to know what are the stock voltage for VDDCR CPU Voltage and SOCK Voltage.?

is there any other settings i need to be worried about ?

 

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3 Replies
benman2785
Grandmaster
Grandmaster

Re: Ryzen 9 3900X vddcr cpu and vddcr soc voltage

1. this is a terrible idea
2. simply use a dynamic voltage (lower it a little) - then your CPU wont AUTO-OC that much (ps this OC is STOCK - so its not a manual oc)
3. dont set a fixed 1.325V or higher - this will heat your CPU without any reason
4. Boost is OC - but Boost IS STOCK SETTINGS ;)
5. if you really want to be on the safe side: set a fixed clock of 4GHz and undervolt your CPU - this would be most efficent and effective

PC: R7 2700X @4.1GHz + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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msheikh22
Journeyman III
Journeyman III

Re: Ryzen 9 3900X vddcr cpu and vddcr soc voltage

Hi BenMan

thanks for responding. here is what i have already done to bios settings.

manual

vcore voltage : 1.1v

cpu core ratio: 3.8

i left the soc auto. and the idle temps are from 37 to 40 C and when my son plays the games like overwatch, divison, rainbow, csgo, rocket leage, APEX the temps always stays under 50C. and there is no decrease in performance.

i googled the stock voltage of Ryzen 9 3900x and found 1.08 v should be the stock voltage but i wanted to verify this in AMD forums.

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benman2785
Grandmaster
Grandmaster

Re: Ryzen 9 3900X vddcr cpu and vddcr soc voltage

@msheikh22 

hey,
the stock voltage of an Ryzen 3900X is a complex topic:

single-core it is up to 1.48V
multicore range from 1.27V-1.38V - the higher the load the less voltage

max 24/7 Voltage is 1.325V (safe) or 1.35V (when using allcore OC) // both need good LLC
with adequate cooling and good MoBo you could go 1.45V (but this will cause degration - yet CPU will still last 5-8 years)

now listen:
clocking your CPU to 3.8GHz and 1.1V is plain stupid for several reasons
1. the voltage of 1.1V is more than you need for 3.8GHz (good chips do that with 950mV)
2. you waste performance due to lack of boost (BOOST = STOCK)
3. why not simply do a negative offset and leave boost enable - this will lower the voltage that is applied at max boost - and still help leaving the CPU cool ;)

btw - leaving vSoC at "auto" isnt a good idea either: just try around with it; RAM OC (XMP) has to be stable; try vSoC of 950mv-1.05V // this will lower the temp of the CPU under load

PC: R7 2700X @4.1GHz + RX 580 4G (1500MHz/2000MHz CL16) + 32G DDR4-3200CL14 + 144hz 1ms FS P + 75hz 1ms FS
Laptop: R5 2500U @30W + RX 560X (1400MHz/1500MHz) + 16G DDR4-2400CL16 + 120Hz 3ms FS
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