3900x lowers its clock speeds?

David97

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My 3900x is at stock speeds but once it hits 158F at 100 percent load it cuts back to 2.6GHz to 60-70 percent cpu load until the temp drops by around 30F then returns back to 100 percent load at stock speed.

Is there a hidden setting for this? From what I have read it should not be Reducing speeds at that temp.

Im using a x570 board with all default settings.

Thanks
 
temps are usually done in celcius. Nobody uses F. But yea, 70C is on the low side assuming whatever you're using to report the temps is actually accurate. Are you using Ryzen master to monitor the temps?

You should not be throttled in any way until you hit around 85-90c .
 
I’m using hwmonitor and ryzen master.

Any ideas on why it would be throttled at 70c? Would it have anything to do with the amd power plan?

I’m out of ideas.
 
At this point I will try anything I’m using a 360mm cooler but I think this issue is software or a bios setting. The system runs fine and is stable.

I’m using the newest chipset driver, bios and drivers that asus has.

This is my first AMD build so I’m not sure what to think.
 
are you using hwmonitor and ryzen master at the same time? or one at a time?
 
What motherboard are you using?
All X570s should be good for handling a 3900x @ stock.
Motherboards WILL throttle the CPU if the VRMs get too hot. (My old Asrock with a 8320e would do the same when OCing the CPU)
What are the VRM Temps?
Do you have any airflow over the VRMs?
 
What motherboard are you using?
All X570s should be good for handling a 3900x @ stock.
Motherboards WILL throttle the CPU if the VRMs get too hot. (My old Asrock with a 8320e would do the same when OCing the CPU)
What are the VRM Temps?
Do you have any airflow over the VRMs?


I will have to check the VRM temps do you know how hot they can get before it will throttle?. It is a asus crosshair VIII Hero.
 
my old asrock vrms would get to like 105-115 before throttling i believe
That Mobo should handle the 3900x no problem, even if the VRM heatsinks aren't attached.
Something is definetly wrong.
Check the VRM temps.
Also update the BIOS id you haven't already.
 
my old asrock vrms would get to like 105-115 before throttling i believe
That Mobo should handle the 3900x no problem, even if the VRM heatsinks aren't attached.
Something is definetly wrong.
Check the VRM temps.
Also update the BIOS id you haven't already.


Does hwmonitor show vrm temps? If so what do they call it.
 
Does hwmonitor show vrm temps? If so what do they call it.
Just feel the heatsink if they are burn you hot they are too hot and il put some airflow at them. If you can hold your hand on them they are not over heating.
 
In the bios are you able to manually set the temperature at which it will throttle. I have mine set at 70C. Normal is about 85C to 90C. I use a Corsair AIO and touching the cooler is not hot.
 
In the bios are you able to manually set the temperature at which it will throttle. I have mine set at 70C. Normal is about 85C to 90C. I use a Corsair AIO and touching the cooler is not hot.

I haven’t seen a setting like that in the bios. I can touch the VRM they are not hot. I even put a fan blowing on that area to see what would happen.

I tried a re-install of Windows and downloaded all the drivers needed and I get the same results. I even reset the bios to its defaults and it still throttles.

maybe I just have a dud.
 
My 3900x is at stock speeds but once it hits 158F at 100 percent load it cuts back to 2.6GHz to 60-70 percent cpu load until the temp drops by around 30F then returns back to 100 percent load at stock speed.

Is there a hidden setting for this? From what I have read it should not be Reducing speeds at that temp.

Im using a x570 board with all default settings.

Thanks

I think you're missing the point that the cpu is trying to keep itself from dying?

And regarding throttle point is dependent upon the bios. What bios are you on anyways, agesa?
 
Maybe your looking at the wrong CPU temp and its much hotter? Definitely should be running muck faster at those temps.
 
I think you're missing the point that the cpu is trying to keep itself from dying?

And regarding throttle point is dependent upon the bios. What bios are you on anyways, agesa?


I know it throttles to protect the cpu but it should not be doing it at that temp.

bios is the newest one version asus 1001.
 
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Maybe your looking at the wrong CPU temp and its much hotter? Definitely should be running muck faster at those temps.


I was going by the cpu package temp but regardless it can only run prime95 for 10-20 min at its full speed.

that is on a 360mm aio with 3 fans spinning at max rpm in a open case.
 
Sure maybe its bios or software but rule out the nuts and bolts first by:


1. Use Hwinfo 64 and not Hardwaremonitor with Ryzen2 -- was big thread about it on AMD reddit a while back

2. Set bios defaults

3. Check your mounting of the AIO cpu block, clean , re-paste and re-seat.

4. Repeat testing and see if you get better results.


I have added a pic of my 3900x with a bad CPU block mate.. This was right after putting the build together. I was idling fine and any sort of load sent the CPU to very high temps and if I had not stopped things right away-- it would have started throttling. This was a Corsair H100i pro that has been returned.

Running a Noctua C14s now and temps are fine.


Bad AIO block mount example. This was the pre-applied paste on the H100i pro and clearly not a very flat block..nothing in the center touching at all!
IMG_2425.JPG
 
I know it throttles to protect the cpu but it should not be doing it at that temp.

bios is the newest one version asus 1001.

That's an old bios, probably with a 75c throttle point. The latest two bios' are 80c throttle point. And you need better cooling or try and identify the issue. I'd check into those two. Also check the news thread on agesa 10004. You might find a beta bios with 1004. I'm running the beta Strix-E 1004 myself.

I was going by the cpu package temp but regardless it can only run prime95 for 10-20 min at its full speed.

that is on a 360mm aio with 3 fans spinning at max rpm in a open case.

If that's not indicative of a problem...
 
Sure maybe its bios or software but rule out the nuts and bolts first by:


1. Use Hwinfo 64 and not Hardwaremonitor with Ryzen2 -- was big thread about it on AMD reddit a while back

2. Set bios defaults

3. Check your mounting of the AIO cpu block, clean , re-paste and re-seat.

4. Repeat testing and see if you get better results.


I have added a pic of my 3900x with a bad CPU block mate.. This was right after putting the build together. I was idling fine and any sort of load sent the CPU to very high temps and if I had not stopped things right away-- it would have started throttling. This was a Corsair H100i pro that has been returned.

Running a Noctua C14s now and temps are fine.


Bad AIO block mount example. This was the pre-applied paste on the H100i pro and clearly not a very flat block..nothing in the center touching at all!
View attachment 196561


What liquid cooler is better than a 360mm? As far as I know there is nothing larger.

shouldn’t a 360 aio be able to run a 3900X at full load for hours?

I have the h150i pro and it covers the entire cpu heat sink, I can tell by footprint in the thermal past as I have already tried resetting it.
 
I run Prime 95 for 20-30 minutes and it never drops that low. Most times it will drop to 3.8ish at 95 degrees and hold there and then things change and the temps drop some and it speeds up or holds speed. I do run my power settings for EDC and TDC at motherboard max not processor max though., 144A and 192A.
 
I run Prime 95 for 20-30 minutes and it never drops that low. Most times it will drop to 3.8ish at 95 degrees and hold there and then things change and the temps drop some and it speeds up or holds speed. I do run my power settings for EDC and TDC at motherboard max not processor max though., 144A and 192A.

What are you using for cooling?
 
Can someone tell me where this setting is in the Asus bios that throttles the CPU once it hits a preset temp? Is that setting a AMD thing because i have never seen it on my Intel builds.
 
Can someone tell me where this setting is in the Asus bios that throttles the CPU once it hits a preset temp? Is that setting a AMD thing because i have never seen it on my Intel builds.
this is where it is on my asus b450m board

upload_2019-10-31_17-28-30.png
 
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What are you using for cooling?
that is on a 360mm aio with 3 fans spinning at max rpm in a open case.
didnt say which aio though...

Bad AIO block mount example. This was the pre-applied paste on the H100i pro and clearly not a very flat block..nothing in the center touching at all!
249143_IMG_2425.jpg
now you got me wondering about mine. my 2600x hits 65ish while boosting to 4250 though. so i thought that was fine.
 
didnt say which aio though...


now you got me wondering about mine. my 2600x hits 65ish while boosting to 4250 though. so i thought that was fine.

A corsair H150i Pro RGB, i thought for sure it would be good enough for the 3900x to run at stock speeds. I really do not understand how it can not be. Sure i can set the thermal throttle limit higher but it just going to throttle again.

Maybe my AIO is crap.
 
A corsair H150i Pro RGB, i thought for sure it would be good enough for the 3900x to run at stock speeds. I really do not understand how it can not be. Sure i can set the thermal throttle limit higher but it just going to throttle again.

Maybe my AIO is crap.
it should be alright, not custom loop good. try upping the throttle temp and see what happens. 70c is totally safe, 75 is fine too.
 
AIOs can just be defective too, is it a proven good unit?

Pump could be defective and only kind of pumping. A disgruntled worker could have put a Kleenex into the radiator before closing it up.
 
AIOs can just be defective too, is it a proven good unit?

Pump could be defective and only kind of pumping. A disgruntled worker could have put a Kleenex into the radiator before closing it up.
ok then...
if the aio was bad it'd be hitting 100C
 
Can the OP try a secondary form of cooling to see if it is cooling related? Maybe they have or can borrow a decent air cooler and test with that.
 
AIOs can just be defective too, is it a proven good unit?

Pump could be defective and only kind of pumping. A disgruntled worker could have put a Kleenex into the radiator before closing it up.


I just bought it brand new, Going by iCue it is working and i had it going at max pump/fan speed.
 
Something seems off since the OP has verified that the AIO is functioning normally and seated well. Possibly bios shenanigans as posted by other ASUS drivers.


didnt say which aio though...


now you got me wondering about mine. my 2600x hits 65ish while boosting to 4250 though. so i thought that was fine.

That sounds fine to me. I don't really run too many 'torture' tests anymore on my stuff and just monitor everything while using the PC. Then make adjustments as needed. I tend to favor a little hotter with a lot less noise these days.

I do run a negative .1 vcore offset on this so that helps my temps a bit at the sacrifice of some performance.

Just posted some testing and such in the 'how do you cool your 3900x thread'

https://hardforum.com/threads/how-do-you-cool-your-3900x.1987219/page-2#post-1044378839
 
I just bought it brand new, Going by iCue it is working and i had it going at max pump/fan speed.
Really hard to remote diagnose, but just because it is brand new doesn't mean it's not defective. By that logic so are the other components no?
I would try another cooler, even the stock air unit of you have one. AIOs are orders of magnitude more complex than air units, and much could be wrong.
You have no way to verify that the pumps are actually pumping at full speed or that there isn't some restriction inside you cannot see.
Could be something else entirely, but don't discount it just because the pumps are set to Max, the fans are on max and it's brand new. I bought a brand new car once and it had a defective cast engine block. Took months to properly diagnose. It was just not broken enough to fail QC.
 
Really hard to remote diagnose, but just because it is brand new doesn't mean it's not defective. By that logic so are the other components no?
I would try another cooler, even the stock air unit of you have one. AIOs are orders of magnitude more complex than air units, and much could be wrong.
You have no way to verify that the pumps are actually pumping at full speed or that there isn't some restriction inside you cannot see.
Could be something else entirely, but don't discount it just because the pumps are set to Max, the fans are on max and it's brand new. I bought a brand new car once and it had a defective cast engine block. Took months to properly diagnose. It was just not broken enough to fail QC.
do you really think that its busted when he's only hitting 70c? have you ever encounter a broken aio?
 
Pretty light on details. But the cpu can’t be dropping to those speeds at 70c unless something is really off. It’s been mentioned that 70c maybe isn’t the actual temperature.

I ran the stock cooler for a while with temps pushing 80-85 and didn’t ever experience anything Ike what the OP is stating.
 
Maybe lap the heatsink on the AIO. I've seen some warped castings before and even a small burr.
 
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