PC Processors

[wownotown]

Just built a new PC with a Gigabyte B550 Motherboard and AMD Ryzen 9 5900X CPU. Had to flash the BIOS to get the OS to load, but everything is running fine now.

Installed all the Windows 10 Drivers from their website and also have the latest BIOS.

My old Intel Core i7 CPU use to idle at around 900 Mhz when nothing was running. Even with the Windows Power Management set for maximum power saving, the AMD CPU idles at around 3.29 Ghz.

Is this normal when there are no applications running? I thought it would go into a lower CPU frequency.

Maybe something I need to change int he BIOS???

Your thoughts?

The minimum core clock after 20 minutes of idle is 2,934.6
The maximum core clock after 20 minutes of idle is 4,816.1

BTW, the temps are averaging between the following.

Minimum 42.6 C
Maximum 68.2 C

Jeff

[Gwillakers]

You were probably on the right tract when you went into power management.

However 2 out of 4 of my builds (with different processors) windows chose a 90% minimum processor setting.

So go back in to power management, and examine in advanced settings what windows chose for your minimum

Processor setting.   Then set it to something decent, like 10 or 15%

[wownotown]

I actually changed the minimum from 0% to 5%, but it didn't make any difference.

[Gwillakers]

Then it is something else.

You might want to view task manager and see if there is a large load on your system.

A lot of time, just monitoring the system will put a load to keep it higher then what you think.

AMD if running a single core or maybe two threads in one core won't have a problem boosting the frequency over 4 GHz.

Bring up Ryzen Master to see how many cores are running at a particular instance.

Remember, Ryzen is making over 1000 adjustments a second, and you can't see them all.

So if you have Task Manager, Ryzen Master, Hwinfo64 or MSI Afterburner running, then remember that they are all polling their numerous sensors.    And all it takes is for one core to have work, and Ryzen will do it's best to get it done.

[wownotown]

Just wasn't sure if this was normal for a Ryzen processor.  When idle there is only maybe 1% utilization.  I know older Intel processors can clock down quite a bit.  This is my first AMD in roughly 10 years, so wasn't sure if this was normal behavior for the new Ryzen processors, and they just don't clock down as much.

The lowest it has clocked down was roughly 2.9 Ghz

[wownotown · Accepted solution]

Interesting!

I installed AMD Ryzen Master as you mentioned, and it shows the CPU clock speed down as low as 333 Mhz.  I wonder if Task Manager is misreporting the true frequency.  Everything looks great when I monitor with the Ryzen Master utility.

[Gwillakers]

Bear in mind that values can change 1000 times a second.

Sometimes monitors will catch their own effects.

One of the reasons I like Ryzen master, is that even though both pieces of software show 1.4ish Volts for Vcore, with Ryzen master you can see average voltage,  Both Ryzen Master and CPU-z will show peak Voltage among the cores.

Big difference if you are boosting a dozen or more cores with 1.4 volts versus just one or two cores.

[unic]

Hi, i can confirm that Ryzen master reports very low mhz, but if i check how much power my pc is using a can cleary see, that if i limit the max cpu power with a Windows powerplan to 20% f.e., i get 50W fewer power draw and no performance impact on my system, in daily office use. So there is somwthing wrong with thr powermanagment, as it draws a lot more neergy than necessary. Could solve it without limit the max mhz.

[campcreekdude]

never believe task manager mhz reportings. use cpuz or ryzen master or hwinfo