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5800X boost issues on Asrock B550 PG Velocita

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atheon View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote atheon Quote  Post ReplyReply Direct Link To This Post Topic: 5800X boost issues on Asrock B550 PG Velocita
    Posted: 20 Nov 2020 at 11:19pm
I just received my 5800X and put it in the B550 PG velocita with latest BIOS 1.5.2 (AGESA V2 1.1.0.0 patch C). It replaces a 3600X. However: I do have some odd problems. Before I start:

- This Windows is a clean install from the upgrade to B550, so only several weeks old. Latest version.
- I've set the BIOS to the defaults (load defaults) with XMP enabled and some fan settings. Nothing else
- I've uninstalled Ryzen master and chipset driver and re-installed them both
- PBO is disabled (see load defaults and set XMP)
- My cooler is an Arctic Liquid Freezer II 280 with Kryonaut paste. Temps are fine for Zen3.
- Memory is 3600CL16 running 1:1 with FCLK
- I do not use motherboard tools, RGB software, AIO tools or other questionable background programs

The problem I have is that my all-core boost speeds seem very low. Every review reports all-core boosts of around 4.5 Ghz. and a Cinebench score of around 6000. My CPU does 4.1 Ghz. all-core with a Cinebench score of 5500. It does so with an all-core voltage of around 1.36 volts (which seems fine voltage-wise).

While running Cinebench, Ryzen master reports the EDC on 99% of 140A and the PPT on 99% of 142 watts. The CPU runs at 73 degrees Celsius during the test (so room for more boost given the fact that Zen3 takes every available degree it has to boost more provided that there is PPT/EDC room for boost).

So I thought I was hitting a PPT and/or EDC wall, so I tried to enable PBO. This ups the values of PPT and EDC, but the CPU is not using it. The CPU still seems to be PPT-limited by an invisible wall (142 watts). When I enabled AutoOC, the CPU even capped on 114 watts instead of 142 watts (so even lower boost and lower Cinebench scores) for no apparent reason.

What is going on here ??

Funny thing is: I checked the single core boosts with AutoOC enabled and the CPU hits a single core boost of 5,1 Ghz. so it can reach those speeds. I then proceeded to run a quick manual OC to see if the CPU would crash. I set it to 1.4 volts (which dropped to 1.36 during load) and 4.5 Ghz. fixed speed and it ran Cinebench fine with around 5750 points, so the CPU is capable of those speeds with those voltages. During the run I checked the PPT and the PPT also reported 142 watts during this test. A CPU running on 1.36 volts on 4.1 Ghz. just cannot consume the same amount of watts as on 4.5 Ghz.

I've created a new Windows USB-bootable external SSD to rule out a broken Windows. Same behavior on the new Windows (with just chipset drivers, GPU-drivers, HWiNFO and CPU-Z voor stress test). 1.36 volts with 4,167 Ghz. multi core.

As far as I can see there are three options:

- BIOS/board is broken
- I have an extremely bad 5800X that needs 1.35 volts for 4.167 Ghz.
- My 5800X is sort of broken and asks way too much voltage

Option 1 is an possibility, option 2 is possible but unlikely as I did the manual OC and was able to have a much higher clocks with that voltage. Option 3 is also an option but impossible for me to debug (and seems unlikely).

I've also emailed Asrock about it and posted it on Reddit (no response yet) but I really think something is wrong with this BIOS. I'm hitting PPT and EDC walls that I should not hit at that speed and voltage, and the reported PPT on the manual OC just seems wrong. I have had some conversations with other people with the 5800X and all of them are hitting 4.5Ghz. or 4.6Ghz. all core boosts on 1.33 volt. All of them have MSI boards btw.

Any suggestions ?
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atheon View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote atheon Quote  Post ReplyReply Direct Link To This Post Posted: 21 Nov 2020 at 1:16am
Asked one of the guys with the MSI board to do some testing:
- Ryzen master monitoring tool
- CB20 testing all core load

His MSI board with 5800X:
Average core voltage 1.39
100% PPT 142 watt, 100% EDC 140A
Boost 4.661 Ghz. all core

My Asrock board with 5800X:
Average core voltage 1.39
100% PPT 142 watt, 100% EDC 140A
Boost 4.133 Ghz. all core

So with the same voltage and the same load, my CPU clocks 500 Mhz. per core lower than his, but EDC and PPT values are the same (100%). This is just not possible and it seems like a PPT/EDC bug (readout).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote atheon Quote  Post ReplyReply Direct Link To This Post Posted: 22 Nov 2020 at 12:22am
Never mind this issue. I've tried to debug the issue by replacing the board. Just installed the CPU in an MSI-board and the boost behavior is exactly the same. I just seem to have a really bad or even broken CPU.
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