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PROBLEMS WITH PX PROFILE - WHY? (Patreon)

Published:
2021-02-22 11:43:18
Imported:
2026-06
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  • PROBLENS_WITH_PX_WHY.pdf

Missing 1 file.

Content

I have prepared for you a short presentation explaining why PX PROFILE does not work for everyone.

Comments

Juan Yunis

What a great explanation. Thank you for this technical pdf. I'm gonna compare PBO+CO for boost with P1/P2.

Anonymous

Good explanation. Thank you!

Anonymous

Thanks Yuri and I Hope you find the fix for CPPC Tags problem...about VRM on ASUS is just try and try to found a good settings if Auto don't work Well.

Michael

Interesting read. FYI, beta 6 is the most stable one for me and the first one which is usable in practice. Great work!!!

Nickolay Semendyaev

Wow, wtf AMD doing. Why they not set CPPC = FIT? They just lost a lot of performance.

Morgan Ring

Thanks for the info. To be honest, beta 6 has been the most stable for my 5600X, (it crashed at first but since lowering the PX values a little it now runs fine.) The only thing I would like to question is about the voltages when CTR is running. (please be gentle with any explanation as I am still pretty new to all this.) But when I have CTR activated, P1,P2 and PX and set to hybrid OC, I notice on Hwinfo that the voltages 'seem' to run quite high for longer, often reading 1.4v and above on all cores,even when they are not boosting with the PX,is this ok?

1usmus
>>54152703

The Windows thread manager is a complex system that requires ready information from the processor, which will not need to be recalculated. That is, Windows only deals with load balancing and the SMU (processor) decides what frequency is optimal. If these two systems interact ineffectively we get either a bad result or a crash. As far as I understand AMD doesn't want to fix anything. This has been going on since the first Ryzen.

Mickey85

Great read and very interesting, Thanks Yuri! I just recently joined and am trying to dial in my 5950x and Asus Dark Hero. While I've had little success so far I know I'll get there and I've already learned a ton about how these processors functions due to your guides. I know I'll get the most out of my chip eventually following your lead and your users comments!

Mickey85
>>54152338

Which Asus board and chip are your using? Do you mind to share your Asus VRM settings? This may be what is tripping me up on dialing in my 5950x on Dark Hero.

Anonymous

Thanks for your great work Yuri. I have moved from your 2.0 RC3 to 2.1 Beta 6. PX just wont work for me. P1 and P2 have always worked fine for me but PX just crashes. Have lowered the values by up to -75mhz from the diagnostic values. Still get crashes while playing games. I have a silver sample 5800x and the Asus Dark Hero. All BIOS settings on auto except XMP profile on. Tried to tweak SOC voltages but didnt help. Strangely the crashes lead to a reboot with the BIOS telling me CPU over temperature but I'm very sure it's not that problem. Hope to eventually get the optimal performance out of the chip - youre doing a great service for the community (not so much AMD though - am quite baffled by how complicated it is to get the performance out of their Zen 3 chips!)

1usmus
>>54155819

I'm glad you like it :) we still have a lot of interesting things to do

1usmus
>>54152931

Yes, this is absolutely normal functioning of the HYBRID OC. The safe operating voltage is within 1 - 1,5V according to AMD. You do not have to worry ;)

1usmus
>>54158886

Write down the details of how this happened and with which application. Perhaps I am missing something. It would also be great if you could show me the PX settings. A service for demonstration of pictures - https://imgur.com/ or Discord :)

Anonymous

https://i.imgur.com/fS6OoWC.png I read this article and applied it to my 5900x + Giga x570 arous master. HIGH STATE-4975mhz, Mid- 4950mhz, Low- 4925mhz. It works very well. Thank you.

Anonymous

yeah with my asus b550, px don't work correctly. I wait u'r picture :)

Sebastian Grob Pla

Yuri, I got two negative values for PX Profile on the diagnostic... is that ok? (-1407700,-1419600,165700)

Setherio

Thanks for that guide - that really put some things in perspective I was completely missing / overlooking / ignorant to.

Tanveer Jugpal
>>54162472

Those are amazing values! Is yours a gold or platinum sample? Fully stable?

Anonymous

Running diagnostic with VRM settings set to auto I get variable sample results (bronze, silver, gold). If I set VRM LLC to moderate settings I can get Gold. But I feel like my processor is closer to a silver sample since I am only able to get PX profile stable at (4925, 4825, 4750).

Anonymous

Damn FIT has my two worst cores at the top

Jason Polychronopoulos

"look for a way to fix CPPC tags" This will be very helpful.

Anonymous

Yuri, iracing thinks CTR is cheating software. "Anti-cheat" kicked me out of the game. Any ideas? Thanks.

Dizziee

Just watching OCCT I see that when under no load at all the 5950X likes to sit between 1.46V and 1.5V. Then, once it goes to an all core workload it shoots down between 0.96V-1.02V.. perplexing. When PBO is boosting at stock it maintains the 1.5V as long as it's sharing one core at a time. Don't know how helpful that information is, but it is indeed interesting. Ryzen doesn't like to maintain a specific voltage; likes to be dynamic.

Michael

Is there a known problem with Windows preferred core mechanism when switching CPUs? I have switched CPU between 5800X and 5950X multiple times (doing clear CMOS and BIOS reset each time) and I have the impression that Windows is slightly confused about the best cores.

tellimused

if you mean that win takes best core values from CPPC (labeled by AMD), but labeling can often be false so true/real best cores (FIT) are not according to CPPC (and CPPC rated best core can be really mediocre) then yes its known by now. (also asus has option in bios to force workload to best cores or gives it to random ones.. meaning core that gets most load can be different all-the-time)

Anonymous

As usual buggy. Doing stability testing. It bails out. It is unstable, and only using in app feature. Just did 6h of same Prime testing, using same exec find in this folder folder, it was stable, no fails. As long I do this app in parallel, without anything, it reports fails in random thread like 50/50 in tests, I even did test like 4GHz on 1.1V, doing profile, no changes, like some query borks up the data. As I did complain before, it does not like high difference, so a deficiency, until someone will be gracious enough from AMD to implement full curve control feature set using the right cores it will be a vaporware. I was blamed, that it I cannot do it, yet my PBO profile is stable in Prime, Linpack stable for 24h on my full 32GB ram set. And still the worst, no changes in real world tasks. The whole idea picking all CCX as a whole is a bucket full of shit. Especially for flagship models, it ads up latency, and gets up messed with dynamic loads. It is more useful to do global undervolt and call it a day. So far... it is like delaying just of because feeding patreon mouths? Complaining about no one reads the manual again?

Mickey85
>>54270120

Dude... I haven't had much success either - but I'm sure not going to post on this forum and blame the creator for my shortcomings. Sorry its not working out for you, but chill out on the blame game. This guy isn't here to cater to your unique situation. You're not entitled to a damn thing. Chill. Keep at it, and perhaps we'll both get it down soon.