AMD Ryzen 1800x CPU thermal throttling

parsec wrote: warman675 wrote: parsec wrote: I would love to see an AMD specification document that shows the maximum temperature of a Ryzen 7 1800X. Or of any Ryzen processor. There are multiple safety features to protect a processor. Two are built into the processor itself. One is built into the mother board. Thermal throttling, which is reducing the CPU core speed to stop the CPU temperature from continuing to increase once it reaches a certain temperature, is a safety feature built into the CPU by the manufacture of the CPU. The CPU still operates in this situation, just at a lower core frequency/speed. If the CPU temperature surpasses a certain maximum allowed temperature, both the mother board and the CPU can turn off the CPU to protect it. Usually the mother board will turn off the CPU before the CPU does it by itself. The PC stops working completely in this situation. It is not clear to me which type of thermal safety feature is active in your PC. Is it thermal throttling, or does the PC shut off? The UEFI/BIOS of some mother boards allow you to change the thermal shutdown temperature. I have not seen that feature so far in the UEFI of my ASRock X370 board. There may be a reason for that. The Cryorig C7 is not as good a CPU cooler as the AMD Wraith coolers are. The C7 is rated in testing to be only a little bit better than the Intel stock CPU cooler, which is considered one of the worst CPU coolers we can use. Current Intel CPUs begin to thermal throttle at ~100° C. In a very small PC case like yours, using a C7 with virtually no ventilation at all, I'm not surprised your 1800X is reaching 75° C. If we subtracted the 20°C offset of Tctrl from your idle temperature of 34° C, do you really believe your idle temperature is 14° C with a C7? I don't trust the CAM software, I've read too many bad things about it. At least run the Ryzenmaster software to verify that CAM is correct. http://www.amd.com/en/technologies/ryzen-master i see all the temps beatween cam and ryzen master, and are the same, so it shows the real temps, but for the motherboard and the thermal throttling are 20C higher and i cannot see that. and in old bios there is more commun to see the power off at the temp xx. here is thermal throttling, there is a menu for that but not for disabling or correct the temps. and if i disable the c states or whatever, nothing happens. just the same thing at 75C. I'm still not sure what is happening, you said thermal throttling, which is the CPU itself reducing its core speed to reduce its temperature, while the PC still works. Does the PC shut off, or does it still work when the CPU temperature is 75° C? It seems you have thermal throttling, the core speed is reduced, but the PC still works. Is that right? C States are a CPU power saving option, which is not related to thermal throttling or thermal shutdown of a CPU. Disabling C States actually causes a CPU to be hotter, since it can't go into a lower power state when it is idle. Disabling random things in the BIOS won't help you. I'll check the thermal throttling options in my X370 board.

the disabling of the c states wasnt a ramdom thing xd i dont do that
https://linustechtips.com/main/topic/552175-how-to-disable-throttling/
but i dont know if was my mistake on the reading xd

Thanks for your help

datonyb wrote: well the best fan i know of for these tiny cases is this http://noctua.at/en/home-product/nh-l12s/specification and that states with the 95w am4 YOU MUST ALSO HAVE GOOD CASE VENTALATION basically you need some form of fans on case to get air flowing through it as well and as for your link its not telling you how to prevent thermal throttling its telling you how to force the cpu to run flat out (this as mentioned will make it even hotter) and thats when the hardware will insist on throttling for safety of componants

hi, thanks for your tip i just bought a https://www.amazon.com/gp/product/B002CYRROY/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

that for fan, it's a very good fan but the result is almost the same, even with CPU and chassis fan at 100%, the CPU still throttle.

so this days I'm searching a good cooler and i found this one https://www.newegg.com/Product/Product.aspx?Item=9SIA59T1R00547 seems really good and fits in my case, but the thing now is the ram.

first I have this RAM:

https://www.pcfactory.cl/producto=22359

so i think the RAM will not fit with that cooler, any ways i have other RAMs, but I'd like to have this one for myself.

and i know the RAM in most cases doesn't need a cooler or something, so in theory I can take off and use the same ram. but if I am arriving at that point I'll put something at the sides like this

https://www.falconcomputers.co.uk/media/product/709/400/400/desktop-ddr-sdram-aluminum-memory-ram-heatsink-and-cooler---blue

PetrolHead wrote: [URL=][/URL]Wasn't the 20C offset fixed/removed? At least I remember reading it's applied only under load, when it would affect the fan speeds, so idle temps should be close to what they actually are. That being said, the max temp is (AFAIK) 95 C _including_ the offset, so in reality the max temp is 75 C (for short periods) and if your temp reading does not include the offset (may depend on the software you're using), then you're hitting the limit.

for that reason i want to change the cooler, and the 20C offset still there, but in one time disabling things in bios, i can go up or skip that, but i was scared becouse i dont want to burn my cpu, so i restart again and put everything like before, and search a new cooler, and i found one:
https://www.newegg.com/Product/Product.aspx?Item=9SIA59T1R00547
but as i said before, if i use that cooler, probably my RAM will not fit anymore, and as far as i know, the heat spread of the RAM is only for a nice looking, and i wondering if i can remove it and use the RAM widhout the heat spread.
and my ram is https://www.pcfactory.cl/producto=22359

Thanks for your reply :)

PD: sorry for my english i don't use a corrector :D xd

I have these temperature related throttling options in the UEFI/BIOS of my X370 Killer SLI/ac board. I'm not sure if your board's UEFI will have these screens and options:

Advanced\AMD CBS\Zen Common Options\Custom Pstates / Throttling:

Relaxed EDC Throttling  (default value Auto, settings of Auto, Enabled, Disabled)

According to this option's description, when set to Disabled, full throttling protection is enabled.

Enabled means reduce the amount of time the processor will throttle.

Auto is AMD recommendation, which is the same as Disabled. So the default setting is full throttling enabled.

So it seems if you set this option to Enabled, the processor will throttle less, which I assume means it allows a higher CPU temperature.

H/W Monitor:

Over Temperature Protection (default is Enabled, settings of Enabled, Disabled)

This option when enabled will shut off the PC when the mother board is over heated. No temperature is specified. Seems strange to me that it is the mother board temperature that is monitored, and not the CPU. You could try to disable this option to check if you can go above 75° C.

Those are the only options about temperature throttling of the CPU or any other component.

One interesting thing to note in the H/W Monitoring screen. Each fan header has an option called Critical Temperature. When the CPU temperature or whatever temperature the fan header is set to monitor reaches this temperature, the fan on that header will run at 100% or full speed. The default Critical temperature for every fan header is 80° C.

If the throttling temperature of the CPU is 75°C, setting Critical Temperature to 80° C by default does not seem to make sense. It should be 75° C, or less, perhaps 70°C. I suggest setting this option to 70° C at least for the CPU Fan, so it runs at 100% when the CPU temperature approaches 75° C. I'm still not certain if Ctcl is being monitored instead of Tdie, although AMD states Tctl is the correct temperature for fan speed control for the 1800X CPU. Nothing is said about the maximum CPU temperature. I have found statements on various websites that the Ryzen throttling temperature is 95° C, but never in something directly from AMD. That is why I still wonder what is correct.

https://community.amd.com/community/gaming/blog/2017/03/13/amd-ryzen-community-update

Your new CPU cooler should help you keep your 1800X cooler, below 75° C, so you may not need to change anything related to CPU throttling. The new CPU cooler might not touch the memory, but it will be close. You should be able to remove the heat spreaders on your memory without damage. My G.SKILL Trident Z and FlareX memory have temperature sensors that are read by HWiNFO64, and are always at ~30° C. That is in a large well ventilated PC case, but memory temperature should not be a major problem.

As PetrolHead said, you should check the VCore that is currently set in the UEFI/BIOS for the CPU. The Auto default value is always more than is necessary, and increases the CPU temperature. At stock clock speeds of an 1800X, you should be able to use 1.3V or less for the VCore. The Auto VCore can be as high as 1.5V.