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martin_malice
Adept I

Re: Ryzen Threadripper 1950x dropping clock speed

I looked into BIOS and everything is on default settings regarding the processor clock speed.

Also, I "killed" every unnecessary process in Task Manager but the consumption only dropped to about 43W so I'm not sure what is causing that kind of power consumption since nothing relevant was running in the background.

I'm aware of Quad Channel but since I ran out of money when I bought the computer I decided to buy two more sticks of RAM later. Also, I think I made a mistake in choosing the RAM since I later found out that particular model number wasn't on Gigabyte's QVL nor Corsair's web page of supported RAM for Threadripper. Odd, but It's working...

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coen99
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

Hello Guys,

I had something similar or related. I discovered it was a "simple" BIOS issue.

At first I thought it was a Windows update issue.

My rig:

Gigabyte X399 Aorus Gaming 7

AMD 1950X

Noctua NF 12

Windows 10 64 bit

After a corrupt BIOS crash (second time, I assume it has something to do with the use of the white USB connector that is also used for the Qflash rescue)  and a Qflash recovery (pff) I noticed my base clock was not 3.4 but 3,7 and did not go down when idle. Also the voltages were higher than ever before and the mainboard always ended with a post code a5 (something about a scsi boot reset issue).

Note: I had set everything to default within my BIOS and I cleared the CMOS.

After booting into W10x64 the clocks go up and are not going down to 2.2 when it's idle as it did before. Also the CPU voltage stays high at 1.3-1.4V as before it dropped in idle to 0.9-1,1V.

As you can influence the base clockspeed with Windows power options reducing the max. processor state I tried this but no luck: the voltages stay way too high resulting in high IDLE temps ramping up my CPU fan all the time. Below screenshots of the change of processor state. The first one you see is at 80%, than at 90% and at 100% processor state.

80.png

90.png100.png

Then I realized I did a BIOS recovery with the latest BIOS version F10. So what if I go back to the old F3G BIOS?

Voila, everything is ok again. Look at the speeds and VOLTAGES! Also tested in stress, than the speeds go up nicely to 3,7!

Everything as it should be. Also the A5 BIOS post code disappeared and the nice AA code appeared again.

F3G.png

So NO BIOS updates for me for the time being. Need to know what causes this!

Hope Gigabyte will take notice and do a BIOS revision.

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smashingrigs
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

I'm a bit late to the party, but  I had bought a cooler with thermal paste already applied to it and I found that the temperatures were not as cool as I would have liked (even when not under load). I didn't even think to re-apply it until I read this post about buying thermal paste. I actually tried both options on two different PCs and couldn't see any discernible difference between the two. I also swapped the paste on both machines to the other and again, no difference. Both are great imo. However, after trying both, the temperatures dropped down dramatically (in the region of 10-15 degress C) when both under and not under load.

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plonk420
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

i'm getting this, too, however my temps aren't maxed out. another thing is that i'm undervolted by 0.1V

it works ok the first 6-18 hours at least at 3.7GHz (at 100% cpu; i do distributed computing), then it starts to slowly drop, even under 3.4GHz

i also tried rebooting, but it immediately started at these speeds

HWiNFO64_2019-03-10_01-56-00.png

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coen99
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

Did you change anything recently?

If you did update the BIOS try to restore to the earlier BIOS.

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misterj
Exemplar

Re: Ryzen Threadripper 1950x dropping clock speed

Forum just lost my reply.  Short version:  Use Ryzen Master (RM) as the only Valid reporter of Ryzen parameters.  Please drag-n-drop an RM screenshot if you have a problem.  If any of PPT, TDC, EDC or CPU temperature reach a limit the CPU voltages and clocks are lowered to protect the processor.  You can choose, you can increase the limits to allow more headroom.  Here is my Cinebench RM Profile where I have increased PPT and TDC:

pastedImage_1.jpg

I needed to use BIOS to get my limits that high.

Thanks and enjoy, John.

EDIT: I should have stated that Threadripper 1 does not have PPT, TDC and EDC in RM.  Since I am not an OCer I do not know how TR1 handles this but suspect that there are similar controls in the BIOS.  I hope someone with experience with TR1 will comment.

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plonk420
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

not that i recall. i DID do some tests on RAM and when i was done ended up restoring Optimized Defaults (and restoring the undervolt). this time, it had fallen in speed (to around 35x) in less than 24 hours

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sumeet_gupta_live
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

I have the same issue. During rendering with 3ds Max and Corona, CPU drops to 2.72 Ghz or less and it's not using 100% of CPU. I've tried everything..such as BIOS reset..Changed power plan to high performance etc..Nothing is working out. Any help would be appreciated. 10-03-2020 02-06-25.jpgThanks!

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martin_malice
Adept I

Re: Ryzen Threadripper 1950x dropping clock speed

I found out that my Enermax CPU Cooler had a flaw and wasn't cooling the CPU properly. After I switched to Noctua everything is more-or-less ok.

I have to warn you that I still haven't found the right cooling solution for this processor since nothing on the market is near perfect (maybe BeQuiet! Dark Rock Pro TR4 has somewhat better performance). Simply said, this processor isn't built for rendering since it has no adequate cooling solution. Eventually, the temperature will go up to 68°C and it will throttle.

Another option is to put the computer in a room where the temperature isn't above 18°C (Server room conditions) but I guess that's not an option for you so you'll have to learn to live with that until someone makes a proper cooling solution. 

Good luck! 

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sumeet_gupta_live
Journeyman III

Re: Ryzen Threadripper 1950x dropping clock speed

Thanks for your reply. I am using Noctua air cooler for the system. What's interesting is I have 2 more 1950X workstations with more or less same configuration(same cooler, same processor and RAM) but different motherboards.

However, on those 2 workstations, during rendering, temperature exceeds above 79 C..Sometimes as high as even 81 C..but they never throttle..CPU clock speed remain consistent at 3.5 GHz+ and, they always use 100% of CPU.

I am wondering if it's a simple windows issue or do i need to update motherboard BIOS as Coen99 suggested in above post?

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