Question Why is my R5 3600 boosting?

[nickshanks]

Why is my Ryzen 5 3600 boosting with PBO off in the BIOS?

https://imgur.com/a/Br02Mi8

View: https://imgur.com/a/Br02Mi8


Ryzen Master is set to Default too.

 

[nickshanks]

So, I've enabled PBO in BIOS and uninstalled Ryzen Master. What I've figured out is that under the AMD Ryzen Balanced power plan, setting the maximum processor state under processor power management to 99% stops PBO. The CPU always runs at 3.6GHz. Setting the maximum processor state to 100% means it allows the processor to boost upto 4.2GHz but in my case the processor seems to always be boosted. Why is this happening?

 

[Phaaze88]

PBO(Precision Boost Overdrive) is AMD's equivalent to MCE(Multi Core Enhancement) on Intel platforms. It's an overclocking feature, it's not the actual turbo boost switch.

The chip boosts as long as the OPPORTUNITY is present(parameters are in the green).
Unless you disable turbo boost - whatever it's called in bios - it'll keep boosting.

 

[nickshanks]

PBO(Precision Boost Overdrive) is AMD's equivalent to MCE(Multi Core Enhancement) on Intel platforms. It's an overclocking feature, it's not the actual turbo boost switch.

The chip boosts as long as the OPPORTUNITY is present(parameters are in the green).
Unless you disable turbo boost - whatever it's called in bios - it'll keep boosting.

But surely when there is no CPU load then the CPU clock should drop?

 

[Deleted member 2962262]

If you want to lock down the frequency of the CPU cores / threads to a low number you probably want to use Ryzen Master (here's a discusssion: https://www.reddit.com/r/Amd/comments/g82lh8/ryzen_5_3600_frequency_control_and_voltage/).
It's Precision Boost 2, rather than PBO, that's boosting the frequencies:
see e.g. https://www.reddit.com/r/Amd/comments/cdrns7/pbo_doesnt_do_what_you_think_it_does_precision/

 

[nickshanks]

If you want to lock down the frequency of the CPU cores / threads to a low number you probably want to use Ryzen Master (here's a discusssion: https://www.reddit.com/r/Amd/comments/g82lh8/ryzen_5_3600_frequency_control_and_voltage/).
It's Precision Boost 2, rather than PBO, that's boosting the frequencies:
see e.g. https://www.reddit.com/r/Amd/comments/cdrns7/pbo_doesnt_do_what_you_think_it_does_precision/

Thank you, this does help. So, if I change the maximum processor state to 1% then the CPU runs cool, this is what I want. Is there a program or something that will watch the CPU load and if under a certain amount then it reduces the clock speed as much as possible (i.e. reduces maximum processor state)? Background tasks are not a priority for me.

 

[Deleted member 2962262]

Thank you, this does help. So, if I change the maximum processor state to 1% then the CPU runs cool, this is what I want. Is there a program or something that will watch the CPU load and if under a certain amount then it reduces the clock speed as much as possible (i.e. reduces maximum processor state)? Background tasks are not a priority for me.

I don't know of any such program.
If you just want to keep your CPU cool, to increase its lifespan, attention to the usual suspects should get you what you want (appropriate cooler correctly installed with paste, good case / fans / air flow, cleaning when required).
All the best.

 

[nickshanks]

I don't know of any such program.
If you just want to keep your CPU cool, to increase its lifespan, attention to the usual suspects should get you what you want (appropriate cooler correctly installed with paste, good case / fans / air flow, cleaning when required).
All the best.

Yeah, I've been running my setup for about 3 years now but for some reason recently just seems like my temps are higher. Idle temps are around 55-60C which seems a little on the high side but bear in mind I also have my fans set to 0 RPM until real load kicks in. I think maybe I need to change the thermal paste, and maybe change my fan configuration?

Looking at my case from the side:

• 240mm rad on the right (front) with 2 fans. Config is fans -> rad -> case. Fans pull air from rad into case
• One exhaust fan top
• One exhaust fan left (back)

Is this the best config for negative air pressure i.e. less dust?

 

[Deleted member 2962262]

Idle temps are around 55-60C are okay, I wouldn't worry.
Thermal paste should be fine at 3 years. (You can change it, but if the CPU sticks to the heat sink and you bend pins you won't be happy.)
The fan setup sounds fine.
Enjoy your nice PC!

 

[CountMike]

Yeah, I've been running my setup for about 3 years now but for some reason recently just seems like my temps are higher. Idle temps are around 55-60C which seems a little on the high side but bear in mind I also have my fans set to 0 RPM until real load kicks in. I think maybe I need to change the thermal paste, and maybe change my fan configuration?

Looking at my case from the side:

• 240mm rad on the right (front) with 2 fans. Config is fans -> rad -> case. Fans pull air from rad into case
• One exhaust fan top
• One exhaust fan left (back)

Is this the best config for negative air pressure i.e. less dust?

Which AIO cooler is that ? High idle temps suggest pump is not working fast enough at that time.