The PBO settings in the BIOS
I don’t want to beat around the bush, I want to get right to it. Before we look at the evaluations, I would like to briefly introduce the various settings I made in the BIOS.
Unfortunately, I can only show the MSI Click BIOS 5 at this point. But you can find the settings like this or similar at the other motherboard manufacturers. We are now in the BIOS under the OC settings and go into the Advanced CPU Config.
Next, let’s go into the AMD overclocking settings!
For my quick test on PBO 2, the first thing I did was disable PBO. In the slides that follow later, I called this “stock PBO off.” Test 1 is thus defined.
Test 2 was called “PBO on” by me. I sort of just fired up the classic PBO as you know it from the past.
The third. Test I have christened “PBO Advanced (power limits off)”. Here I have made some more settings. Next picture!
Now comes the Curve Optimizer, with which you can “undervolt” or overclock.
We set: All cores, negative and last you can set a value up to 30. At 30 you can achieve a maximum undervolting of up to (-150 mV offset). Unfortunately, that didn’t work for me without regular crashes. Any owner of a current Ryzen 5000 can try it out for themselves here. If these functions are not displayed on your mainboard, this can have two reasons. First, your motherboard is not a 500 series. Secondly, your Agesa version is too old, a BIOS update will help! You can get this on the HP of your manufacturer.
In the picture above you can see the settings of the 4. Tests. Called “PBO Advanced (power limits manually high)”! Now I have fixed the maximum power limit to 130 Watt, the Thermal Design Current to 95 A and the Electic Design Current to 130 A. I did not change the settings of the Curve Optimizer. These are the same as the 3. Test.
My last test is called: “PBO Advanced (power limits manually low)”, the Curve Optimizer is still the same as in test 3!
With these five different settings, I sent my AMD Ryzen 7 5800X on its way. I then tested the whole thing in Cinebench R23 (multi-core) and 3DMark Time Spy. I wasn’t primarily concerned with testing every benchmark and game in the CPU limit right now. I just want to point out that you can influence your temperatures/power consumption with the different settings in the BIOS. How this affects the performance, that we now look at. Next page!
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