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AMD Ryzen 9 3950X - vcore and thermal

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Hello All

Today I upgraded my Ryzen 7 2700 with a Ryzen 9 3950X - good news!
My Motherboard is an ASUS PRIME X470-PRO (BIOS Version 5220 - the latest available)

Everything is fine but,
Why is the vcore get's up to 1.47V when I am not overclocking (not really planning to) but precision boost is on Auto (guessing it's means enabled)
And the core hits 56°C watching Youtube and 47°C with ~no load, I run a stress test with CPU-z and got it to 89°C when the fan were blowing 100% @ 4GHz
So the CPU has contact with my cooler: Thermalright ARO-M14O rated up to 240W

On my second look, even if all the regular utilities saying I have 1,4~ V
AMD Ryzen Master is stating voltages between 0,9~1,24

Can you please help me with this one?
Should I disable precision boost or this is normal /safe?
Maybe set the vcore manually to a safe value?

3900X owners might help me on this!

CPU-z validation:
https://valid.x86.fr/w1r7j9

Thank You!
 
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It's normal. All of the 3000 series seem to do it.

Edit:. I have pbo disabled right now and still have jumps to 1.5v at idle.
 
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It's normal. All of the 3000 series seem to do it.

Edit:. I have pbo disabled right now and still have jumps to 1.5v at idle.

And what about the thermals?
I know the 2700 was only a 65W TDP CPU, but this one quickly hitting 90°C and it making me nervous,
Isn't it killing the hardware on the long run?
 
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Normal behavior for Ryzen 3000.

On the temps your cooler may just not be good enough AMD recommends a 280mm AIO.
 
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Normal behavior for Ryzen 3000.

On the temps your cooler may just not be good enough AMD recommends a 280mm AIO.
I heard that,
But the 3900X should need the same then, I mean, the difference isn't big.
Or actually, the 3950X should be more efficient, since it has better silicon (or at least it's been promised to be better).
 
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I heard that,
But the 3900X should need the same then, I mean, the difference isn't big.
Or actually, the 3950X should be more efficient, since it has better silicon (or at least it's been promised to be better).

I don't have the 3900X on air but it does run into the high 70s with my Corsair h115i (20-23c ambient)... pretty sure it would run significantly hotter on a typical air cooler. High end Noctua comes pretty close.

Also I wouldn't compare review samples to retail samples more people need to get them before we can compare how binned they are.
 
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First how dit you get your hands on a 3950X already, where 3950X not first set to be available November 25?

Secondly it does sound a bit hot according to what reviews get of temperatures. I read a review from hexus that used a Noctua NH-D15 with a single fan and they oc it manually to all core 4.375 ghz and max temp whas 98 degrees Celsius at 1.375 volts and with two fans this cooler is rated to only 220 watt tdp and with one fan the tdp rate would be even lower. So 89 degrees stock does sound a bit hot to me and also other reviews with a single tower cpu aircooler cut get temp as low as 76 degrees Celsius stock. I can't say what is wrong. It can be cooler contact is not totally 100 % right. Maybe try look after if the cooler are mounted straight and are secured properly and not sitting lose. I assume you used the right amount of cooling paste, to much or to little can have a negative effect on transfer of heat. In rare occasions I have herd of CPU's being badly soldered from factory. Also ryzen 3000 act more like a gpu boost than you are used to for cpu boosting. Case airflow is also importen and how is the ambient temperature where you live.
 
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I heard that,
But the 3900X should need the same then, I mean, the difference isn't big.
Or actually, the 3950X should be more efficient, since it has better silicon (or at least it's been promised to be better).
My 3900x, stock, hits 68 C with a 480 mm radiator running 100 % CPU. You need to go big if you run these CPUs at a contentious high load, or learn to live with the fact that it throttles.
 
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And what about the thermals?
I know the 2700 was only a 65W TDP CPU, but this one quickly hitting 90°C and it making me nervous,
Isn't it killing the hardware on the long run?

I concerned he $45 Scythe Fuma (if ya can find one) / $55 Fuma 2 would give ya the same temps as a H150i Pro
 
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My 3900x, stock, hits 68 C with a 480 mm radiator running 100 % CPU. You need to go big if you run these CPUs at a contentious high load, or learn to live with the fact that it throttles.

My 3900x doesn't go over 68c with a 240mm rad. Ambient temps are 26-28c.
 
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Okay, I get it now...

We're gonna need a bigger cooler :D:eek:

For now I would not spend any cent on new hardware,
Is would be nice to just set a max vcore for the CPU and then let it find a correct ~lower clock speed.
Can I do it without sacrificing the precision boost option?
 
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My 3900x doesn't go over 68c with a 240mm rad. Ambient temps are 26-28c.
I will update when I get it under Windows. I was expecting my set-up to perform better. My ambient is 20-21 C and the rad is outside the case....
 
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I will update when I get it under Windows. I was expecting my set-up to perform better. My ambient is 20-21 C and the rad is outside the case....

I think the Aorus Master has slightly higher stock voltages than most boards unless you go into the PBO section and Manually turn it off.

Also with custom water you may be at the IHS limits of transferring heat without going sub ambient.
 
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I think the Aorus Master has slightly higher stock voltages than most boards unless you go into the PBO section and Manually turn it off.
No PBO, Linux...no clue what the VCore is.
 
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Your guy's 68c is making me jealous.... Mine typically stays around 72-74c during stressing with some very brief jumps to 76-77 then back down for whatever reason. I just run at the balanced preset though to me 100% fans isn't realistic.
 
D

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@csendesmark
Put a small fan right on the VRM package area.
That should help bring your temps down a touch or two.
A large enough fan on the VRM package area, might hit the base of the cpu cooler too!!
Cost should be in the ball park of free, if you have a fan laying around.
 
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@ShrimpBrime
I picked my case to have that general part windy ;)
 
D

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I picked my case to have that general part windy ;)
I know, I know, it requires removing the panel and finding a way to fasten it while the case is upright.
But the time and effort may be worth it while using that air cooler.
Is also recommended when using liquid cooling as well.
 
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Hello All
Today I upgraded my Ryzen 7 2700 with a Ryzen 9 3950X - good news!
My Motherboard is an ASUS PRIME X470-PRO (BIOS Version 5220- the latest available)

Everything is fine but,
Why is the vcore get's up to 1.47V when I am not overclocking (not really planning to) but precision boost is on Auto (guessing it's means enabled)
And the core hits 56°C wathing Youtube and 47°C with ~no load, I run a stress test with CPU-z and got it to 89°C when the fan were blowing 100% @ 4,05GHz
So the cooler has contact with my
Thermalright ARO-M14O rated up to 240W

Can you please help me with this one?
Should I disable precision boost or this is normal /safe?
Maybe set the vcore manually to a safe value?

Edit - CPU-z validation:
https://valid.x86.fr/w1r7j9

Thank You!
There is nothing wrong with the CPU. Dont disable anything.
You just used to different behaviour and different temp reading coming from the 2700X to 3000series. What you saw to 2700X was the average temp of the whole die. What you are seeing now with 3950X is the absolute hot spot of the cores inside the CPU. The 1000/2000 series dont report that.
Also the core voltage works differently in the 3000 line. When the load is low you will see high voltages but there is no stress to the CPU because the current is low. If the load increases and its more constant then the voltage drops to where is supposed to go.

You can see it if you install the HWiNFO64.

Take a lok at the pics below to max and avg values.

First is after 1 hour of browsing and watching videos
Second is after 1 hour of gaming
All CPU setting are auto and PBO enabled

2019-11-14 (2).png


2019-11-14 (3).png



During Cinebench R20 all core

2019-11-14 (4).png


EDIT:

The Tctl/Tdie one is all new hot spot of cores (the reading is switching between different sensors in miliseconds to report always the hotest)
The CCD Tdie is either from a single sensor at some edge of the die/CCD... or it is the average of all 60+ sensors inside the CCD (I'm guessing the first)
 
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There is nothing wrong with the CPU. Dont disable anything.
You just used to different behaviour and different temp reading coming from the 2700X to 3000series. What you saw to 2700X was the average temp of the whole die. What you are seeing now with 3950X is the absolute hot spot of the cores inside the CPU. The 1000/2000 series dont report that.
Also the core voltage works differently in the 3000 line. When the load is low you will see high voltages but there is no stress to the CPU because the current is low. If the load increases and its more constant then the voltage drops to where is supposed to go.

You can see it if you install the HWiNFO64.

Take a lok at the pics below to max and avg values.

First is after 1 hour of browsing and watching videos
Second is after 1 hour of gaming
All CPU setting are auto and PBO enabled

View attachment 136959

View attachment 136960


During Cinebench R20 all core

View attachment 136961
Thank You
 
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Thank You
For reference I add the last 2 edited lines.
I may also add that I'm using AIO water cooler, the Corsair H110i 280mm and I'm not using any case.

I would really like to see (like those HWiINFO pics) how the 3950X behaves in similar workloads with your current configuration/cooling.
 
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Benchmark Scores https://valid.x86.fr/4d8n02 https://www.techpowerup.com/gpuz/g46uc
Can do it later,
with Adobe Premiere workloads ;)

Edit
Worst case: I have to buy a Corsair H110i 280mm or similar solution
 
Last edited:
Joined
Sep 3, 2019
Messages
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Location
Thessaloniki, Greece
System Name PC on since Aug 2019, 1st CPU R5 3600 + ASUS ROG RX580 8GB >> MSI Gaming X RX5700XT (Jan 2020)
Processor Ryzen 9 5900X (July 2022), 150W PPT limit, 79C temp limit, CO -9~14
Motherboard Gigabyte X570 Aorus Pro (Rev1.0), BIOS F37h, AGESA V2 1.2.0.B
Cooling Arctic Liquid Freezer II 420mm Rev7 with off center mount for Ryzen, TIM: Kryonaut
Memory 2x16GB G.Skill Trident Z Neo GTZN (July 2022) 3600MHz 1.42V CL16-16-16-16-32-48 1T, tRFC:288, B-die
Video Card(s) Sapphire Nitro+ RX 7900XTX (Dec 2023) 314~465W (366W current) PowerLimit, 1060mV, Adrenalin v24.2.1
Storage Samsung NVMe: 980Pro 1TB(OS 2022), 970Pro 512GB(2019) / SATA-III: 850Pro 1TB(2015) 860Evo 1TB(2020)
Display(s) Dell Alienware AW3423DW 34" QD-OLED curved (1800R), 3440x1440 144Hz (max 175Hz) HDR1000
Case None... naked on desk
Audio Device(s) Astro A50 headset
Power Supply Corsair HX750i, 80+ Platinum, 93% (250~700W), modular, single/dual rail (switch)
Mouse Logitech MX Master (Gen1)
Keyboard Logitech G15 (Gen2) w/ LCDSirReal applet
Software Windows 11 Home 64bit (v23H2, OSB 22631.3155)
If you can and willing to do...
1) browsing/videos
2) gaming
3) heavy work load

You can record 3 sessions individually as HWiNFO (sensors only mode) has the ability to restart readings from zero hitting that clock down right.
Am I wrong, or the adobe premiere does not load well every core/thread when there are more that 12c/24t available? I may remember it wrong...

Thanks!

Worst case: I have to buy a Corsair H110i 280mm or similar solution
First do everything you can to improve case air flow, within sane limits of course, and then you could look for a AIO because you may end up to pay a large amount of money with not so great ROI (return of investment)
 
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Location
Hungary / Budapest
System Name Kincsem
Processor AMD Ryzen 9 3950X
Motherboard GIGABYTE X570S AERO G
Cooling Be Quiet Black Rock 4 Pro
Memory HyperX 128GB Fury 4×32GB 3200MHz HX432C16FB3K4/128
Video Card(s) Sapphire AMD RX 7900 XT Pulse
Storage Samsung 970PRO 500GB + Samsung 980PRO 2TB + Adata SX8200 2TB + WD Ultrastar HC550 16TB
Display(s) Acer QHD 27"@144Hz 1ms + UHD 27"@60Hz
Case Cooler Master CM 690 III
Power Supply Seasonic PRIME GOLD 850W
Mouse Logitech G502 Hero
Keyboard HyperX Alloy Elite RGB
Software Windows 10-64
Benchmark Scores https://valid.x86.fr/4d8n02 https://www.techpowerup.com/gpuz/g46uc
If you can and willing to do...
1) browsing/videos
2) gaming
3) heavy work load

You can record 3 sessions individually as HWiNFO (sensors only mode) has the ability to restart readings from zero hitting that clock down right.
Am I wrong, or the adobe premiere does not load well every core/thread when there are more that 12c/24t available? I may remember it wrong...

Thanks!

I know HWInfo, am am not really playing anymore but will do the rest

Also, do you think if my CoolerMaster CM 690 III receive a Corsair H110i
or maybe I might go for a H150i PRO with a case which is ready for the big block.

Edit:
Adobe Premiere itself is single threaded when you do your project, but when you do apply stabilizer for the clips, each clip having it's thread assigned so that is scaling rather nicely, which I planning to do.
Also when you exporting the final render, which is using all available cores by default
 
Last edited:
Joined
Sep 3, 2019
Messages
2,965 (1.78/day)
Location
Thessaloniki, Greece
System Name PC on since Aug 2019, 1st CPU R5 3600 + ASUS ROG RX580 8GB >> MSI Gaming X RX5700XT (Jan 2020)
Processor Ryzen 9 5900X (July 2022), 150W PPT limit, 79C temp limit, CO -9~14
Motherboard Gigabyte X570 Aorus Pro (Rev1.0), BIOS F37h, AGESA V2 1.2.0.B
Cooling Arctic Liquid Freezer II 420mm Rev7 with off center mount for Ryzen, TIM: Kryonaut
Memory 2x16GB G.Skill Trident Z Neo GTZN (July 2022) 3600MHz 1.42V CL16-16-16-16-32-48 1T, tRFC:288, B-die
Video Card(s) Sapphire Nitro+ RX 7900XTX (Dec 2023) 314~465W (366W current) PowerLimit, 1060mV, Adrenalin v24.2.1
Storage Samsung NVMe: 980Pro 1TB(OS 2022), 970Pro 512GB(2019) / SATA-III: 850Pro 1TB(2015) 860Evo 1TB(2020)
Display(s) Dell Alienware AW3423DW 34" QD-OLED curved (1800R), 3440x1440 144Hz (max 175Hz) HDR1000
Case None... naked on desk
Audio Device(s) Astro A50 headset
Power Supply Corsair HX750i, 80+ Platinum, 93% (250~700W), modular, single/dual rail (switch)
Mouse Logitech MX Master (Gen1)
Keyboard Logitech G15 (Gen2) w/ LCDSirReal applet
Software Windows 11 Home 64bit (v23H2, OSB 22631.3155)
I found that at your case you can fit a radiator:

Top/Front: 240mm
Back: 120mm


The H110i is 280mm and the H150i Pro 360mm

You must check through reviews for what is a good 240mm AIO compared to other 240, and against to tower air coolers...
 
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