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Help with 3900x temperature spikes and high voltage with Gigabyte x570 Aorus Master

 
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post #1 of 8 (permalink) Old 06-15-2020, 03:21 AM - Thread Starter
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Help with 3900x temperature spikes and high voltage with Gigabyte x570 Aorus Master

Hi there guys, I recently completed a new build with the following parts:

Motherboard: Gigabyte X570 Aorus Master
CPU: AMD Ryzen 9 3900x
CPU Cooler: Noctua NH-D15 Chromax
PSU: Corsair HX1000W 80+ Platinum
System Memory: G.Skill Trident Z Neo Series RGB 32GB (2 x 16GB) DDR4-3600 PC4-28800 CL16
GPU: EVGA GeForce RTX 2070 XC GAMING, 08G-P4-2172-KR, 8
OS (Version): Windows 10 x64 (Version:1909)

I am having a problem with the fact that the temperature for the cpu constantly spikes up and causes my fans to ramp up. I currently am using the Noctua NH-D15 with the cooler and have noticed that my idle temps have been around 42.2, but they can spike up to as high as 60C during idle. I've updated to the latest chipset drivers 2.04.28.626 and have also update my Bios to F12g on the Gigabyte website. I understand that AMD has microboost that cause the temperature to shoot up like that, but to me that feels like its such a drastic change. I am also currently using the AMD Balanced Power Plan. I've also attached my Cinebench r20 scores and they seem to be pretty good. Is there a way that I could maybe reduce the temperature spikes? One interesting thing that I noticed was that my average voltage in Ryzen Master was around 1.37. Is this normal for ryzen? As of now, I have 2 140 NF-A14 fans for intake and 1 NF-A14 for exhaust in addition to the NH-D15.

I tried to do some research and I stumbled upon this post https://old.reddit.com/r/Amd/comment...and_fan_speed/ by /u/masterleros, but I am a total noob so I dont really know if would be safe for me to use those settings. Is it safe for me to run these settings to mitigate the temperature spikes?

I've attached a photo of my ryzen master, cinebench scores, bios settings, and fan curves. If anyone could give me some tips to stop the temperature spikes and fans ramping up I would really appreciate it.
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Attached Images
File Type: bmp 200615024412.BMP (5.93 MB, 11 views)
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post #2 of 8 (permalink) Old 06-15-2020, 03:38 AM
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Voltages go up and down alot on Ryzen.
It can even peak around 1.475V
No worries though.

Its not much about voltage with Ryzen but about wattage (amperage)
The more power you draw the lower the voltage will be.
So on very light small loads you may see very high voltage spikes which is completely normal.

On CB20 MT bench it will drop around 1.3V.
On Prime95 small FFT's it will drop around 1.275V.

Because Ryzen changes clock (boost) speeds often and really fast it also normal to see temperature spikes.
As long you as you stay under 95c in P95 small FFT's your golden.

I get to 86c in P95 small FFT's and 72c CB MT bench but i only have a 3700x, a 3900x will run hotter

1st PC >>> Ryzen 3700x @ PBO OC - 16GB 3800mhz CL16 - 5700XT @ 2150mhz
2nd PC >>> Intel I5-4790K @ 4,7ghz - 16GB 2133mhz - RX570
3rd PC >>> FX-6300 @ 4,5ghz - 8GB 1866mhz - GTX960
4th PC >>> Dual Core E5700 - 2GB 800mhz - HD6670
Main PC
(25 items)
CPU
AMD Ryzen 3700X
Motherboard
Asus Gaming TUF X570
GPU
Sapphire RX5700 XT Nitro+ Special Edition @ 2150mhz
RAM
G.skill Ripjaws 16GB 3800mhz 16-16-16-36
Hard Drive
Samsung 256GB NVME
Hard Drive
Samsung 860 EVO 500GB
Hard Drive
Seagate 3TB 7200rpm
Hard Drive
Seagate 3TB 7200rpm
Power Supply
Corsair RMI 1000W
Cooling
Scythe Fuma Triple Fan
Cooling
Lamptron Fan Controller
Cooling
5x Corsair AF120
Case
Corsair AIR540
Monitor
Iiyama 1440p
Keyboard
Logitech G413 Silver
Mouse
Logitech G403 Wired
Mouse
Razer Naga Trinity
Mousepad
A big one
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Oppo Sonica DAC (modified)
Audio
Lehmann Linear headphone amp
Audio
AKG K812
Audio
Sennheiser HD650
Audio
Audioqeust Nighthawk
Audio
Beyerdynamic DT770
Audio
Focal Elear
CPU
I5-4790K @ 4,7ghz
Motherboard
Asus Z97 Pro Gaming
GPU
Sapphire RX570
RAM
16GB G.E.I.L Black Dragon 2400mhz
Hard Drive
Samsung 860 EVO 256GB
Hard Drive
Samsung 860 EVO 500GB
Power Supply
Seasonic 500W
Cooling
Scythe Fuma 2
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post #3 of 8 (permalink) Old 06-15-2020, 05:33 AM
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As @Farih stated it's normal.
I also have a 3900X and temps go high when under heavy load, p95 around 75-80, cb20 around 75, gaming around 58-65.

Voltage wise what Farih said also applies, it's normal. Don't worry about that if the cpu is full stock in the bios. Heavy load = lower vcore higher current = all cores around 4000-4250 depending on temperature, usually above 70C CPU will be around 4ghz all core. Light load = more vcore less current = cpu boosting higher in the 6 first cores.

Don't fall for dumb comments specially on Reddit (don't get me wrong Reddit is great but people there like to set fixed voltage and clock) when people tell you to set fixed clock, you are going to lose single core performance.

You can try some negative offset if the temperature is really bothering you, but as you get close to -0.05V you will see the 6 first cores boosting less. So it's a game of applying a negative offset and running cb15/cb20/cpuZ and other that will measure multocore and single core performance. The moment you start to get away from stock scores is when you now the negative offset you applied is too much and is impacting in the performance.

If the temperature does not bother you, leave as it is, nothing wrong with that. You might also read about cpu deviations which came up this week, but that has been debunked so nothing to worry about too.

There's a light software called Fan Monitor (so you don't need to do back and forth to the bios) the author has posted it over linustech forums, it's a great light peace of software and you can control your fans from there. You can also use the proprietary software from your mobo to do it too but Fan Monitor is really simple. Set a fan curve, or set it flat and that's it's when you game rump up the fans, or set it to whatever you want and use 2-3s hysteresis to ignore "fake" spikes in the temperature, in that way the fans will spin up only if the temperature sustains after the 4th second.


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PCDEBAIANO
(7 items)
CPU
Ryzen 3900X
Motherboard
Taichi X370
GPU
AMD Radeon VII
RAM
HyperX Predator 4000
Cooling
3x360mm
Case
Lian Li o11d
Monitor
HANNspree HG324
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Last edited by thomasck; 06-15-2020 at 05:43 AM.
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post #4 of 8 (permalink) Old 06-15-2020, 06:33 AM
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No need to worry, i agree. You can try to find a setting like "EfficiencyModeEn" in Bios. At least on my C8H there is this setting (AMD CBS/NBIO Common Options/SMU Common Options) and it reduces the spikes in voltage and temp on my system. (3900X, Asus Crosshair 8 Hero X570). But I'm not sure, how it's limiting the system...
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post #5 of 8 (permalink) Old 06-15-2020, 11:08 AM - Thread Starter
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Thank you guys for confirming that its normal. I was worried that maybe there was some thing wrong with the cpu. I guess I'll try to adjust the fan curve so that when it microboost the fans don't ramp up
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post #6 of 8 (permalink) Old 06-15-2020, 12:08 PM
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The main reason for the temp spiking so much is that there are tonnes of temp sensors in the chip and it reports the hottest one.. when it microboosts it creates a hot spot and the temp seems to spike really hard. If you suddenly go from idle to two cores next to each other at over 1.4v the temp spike can be huge because the parts of the chip outputting all that heat are so tiny and it takes time for the power to get out of the cpu and into the cooler.

Another way to prevent the fan speed spikes is to put a temp sensor on the side of the cooler's base and control fan speeds using that.. or if you have a radiator attach it to the side of that.

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post #7 of 8 (permalink) Old 06-15-2020, 05:01 PM
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First, in the BIOS, set your CPU voltage and offset to 'Normal' (they default to Auto).

Next, follow the instructions in this reddit post: https://www.reddit.com/r/Amd/comment...and_fan_speed/
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post #8 of 8 (permalink) Old 06-21-2020, 06:34 AM
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Quote: Originally Posted by betam4x View Post
First, in the BIOS, set your CPU voltage and offset to 'Normal' (they default to Auto).

Next, follow the instructions in this reddit post: https://www.reddit.com/r/Amd/comment...and_fan_speed/



This should be a sticky, I just did this on a new build and surfing temps went from 40-50C to 36C

3700X Stock cooler
Gigabyte B550 Aorus Master
Evga 550 SuperNova
Evga 2060 super
32GB Corsair LPX 3200
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