Thermal Throttling

[stevemoorevale]

Hi There,

 

I have a Ryzen 2700X and i have noticed in HWinfo that a lot of my cores are dropping well below base clock of 3.7ghz. I am just using the supplied Wraith Prism cooler. I have enabled PBO in the bios so it is auto boosting to well over 4ghz regularly but also dropping way below base. My voltages seem very high too but i asked about that on this forum a while ago and was reassured that being over 1.4v is normal for this cpu.

Temperature wise i have had it just above 70 degrees at load (photo processing in Adobe Lightroom) but it drops to the high 30s at idle. I was wondering whether the relatively high temp of around 70 degrees was causing the system to thermal throttle and dial back the clock. Any suggestions would be greatly appreciated. 

[.Apex.]

15 minutes ago, stevemoorevale said:

I have a Ryzen 2700X and i have noticed in HWinfo that a lot of my cores are dropping well below base clock of 3.7ghz. I am just using the supplied Wraith Prism cooler. I have enabled PBO in the bios so it is auto boosting to well over 4ghz regularly but also dropping way below base. My voltages seem very high too but i asked about that on this forum a while ago and was reassured that being over 1.4v is normal for this cpu.

Temperature wise i have had it just above 70 degrees at load (photo processing in Adobe Lightroom) but it drops to the high 30s at idle. I was wondering whether the relatively high temp of around 70 degrees was causing the system to thermal throttle and dial back the clock. Any suggestions would be greatly appreciated. 

It's normal behavior for a CPU to drop clocks at idle, if you wanna see max boost then stress your CPU with Cinebench 20 for example and pay attention to your max temps, 70C is not thermal throttling temp though.

You can disable those power saving features by picking the High Performance Power Plan in Windows, but I don't know if it will behave properly with AMD, I've heard mixed stories on that one.

[Jurrunio]

14 minutes ago, stevemoorevale said:

also dropping way below base

because it's not doing any significant work, and trying to save power and run cooler

 

15 minutes ago, stevemoorevale said:

My voltages seem very high too

dont read VID, read SVI2 voltage readings

[5x5]

At idle the CPU will downclock to save power and reduce heat output

[stevemoorevale]

5 minutes ago, _Syn_ said:

It's normal behavior for a CPU to drop clocks at idle, if you wanna see max boost then stress your CPU, like Cinebench 20 for example and also pay attention to your max temps, 70C is not thermal throttling temp though.

You can disable those power saving features by picking the High Performance Power Plan in Windows, but I don't know if it will behave properly with AMD, I've heard mixed stories on that one.

Thank you for your reply. I've just run two Cinebence R20 all core runs (i already had r20 installed). Max temp first run 83 degrees and 2nd run 84 degrees. All cores at 100% and all cores stayed around the 3,966mhz according to HWinfo. So yes it does seem as though everything is working as expected. Perhaps in the future it would be worthwhile to upgrade my cpu cooler.

[stevemoorevale]

Just now, 5x5 said:

At idle the CPU will downclock to save power and reduce heat output

 

9 minutes ago, Jurrunio said:

because it's not doing any significant work, and trying to save power and run cooler

 

dont read VID, read SVI2 voltage readings

Thank you both for your replies. It;s good to know things are running as expected.

[5x5]

2 minutes ago, stevemoorevale said:

Thank you for your reply. I've just run two Cinebence R20 all core runs (i already had r20 installed). Max temp first run 83 degrees and 2nd run 84 degrees. All cores at 100% and all cores stayed around the 3,966mhz according to HWinfo. So yes it does seem as though everything is working as expected. Perhaps in the future it would be worthwhile to upgrade my cpu cooler.

You can also ramp up fan speed. The default curve is aimed at silence

[stevemoorevale]

13 minutes ago, Jurrunio said:

because it's not doing any significant work, and trying to save power and run cooler

 

dont read VID, read SVI2 voltage readings

Jurrunio, which of these SV12 reading do i need to pay attention to?

 

[Jurrunio]

10 minutes ago, stevemoorevale said:

Jurrunio, which of these SV12 reading do i need to pay attention to?

All tbh, SVI2 and SMU are on-die sense in the CPU.

 

That voltage is really high tho, I think there's some big undervolting headroom until it gets unstable or drops performance.

[stevemoorevale]

45 minutes ago, Jurrunio said:

All tbh, SVI2 and SMU are on-die sense in the CPU.

 

That voltage is really high tho, I think there's some big undervolting headroom until it gets unstable or drops performance.

Thank you. I have noticed that during a cinebench run the voltage does drop right down to 1.35v. I wouldn't know where to start when it comes to undervolting. 

[Jurrunio]

10 minutes ago, stevemoorevale said:

Thank you. I have noticed that during a cinebench run the voltage does drop right down to 1.35v.

Might need some LLC then to keep the load voltage similar to now when you undervolt.