PBO / XFR 3000 series - Definitive values

opethdisciple · 1 May 2020 at 12:38

I want us to agree on what we think are the most generally optimal settings for XFR / PBO for the 3000 series.

I find it frustrating that across different forums and the internet people are using a whole breath of values which I refuse to believe can be so variant.

For example Buildzoid will have you believe that this the best:

PPT: 300
TDC: 230
EDC: 230
Scalar 2x

Others use EDC bugs and set it to 0 or 1 or 10 etc... which I have tried and have seen better scores in benchmarks but I refuse to use something that has no logic.

At the moment I am using the following which @Kevin Matthews gave me in another thread. At least these are based on some logic. I.e these values are the default for 105w CPUs. I can live with that as it is based on science.

PPT: 142
TDC: 95
EDC: 140
Scalar 5x

However is this it, can we say that this is the most optimal XFR / PBO settings there are (with out taking advantage of bugs, as they will get 'fixed' in newer BIOSes)

So what do you say?

I don't want this thread to become a ramble. I want this to be to the point. These values cant possibly be so variant amongst us as we are all running the same 3 to 4 CPUs (3600/x, 3700x, 3800x, 3900x)

It's quite impossible for one to say I'm running 195, 150, 65 and another one say I'm running 76, 3, 99 because I get the impression that a lot of people are just punching in random numbers. (If you look across the internet and forums)

So the point of this thread is to agree on what we think are the most optimal values given everything else is as intended. I.e no third party things like power plans etc.

Official AMD only.

marcus_667 · 1 May 2020 at 12:53

I disabled it on my 3950x and got better boosts lol

opethdisciple · 1 May 2020 at 12:58

marcus_667 said:
I disabled it on my 3950x and got better boosts lol

Well I definitely gain from having it on. 5% in Intel Burn Test and about 250 points in Cinebench. From 4750 to close to 5000.

muon · 1 May 2020 at 13:16

Of course the best is uncapped i.e. Buildzoid. Not all motherboards will allow settings that high though.

It's only because of poor cooling is it possible for a power throttled setting to be better.

Kevin Matthews · 1 May 2020 at 13:45

PBO auto
boost override +200
c-States enabled
CPPC enabled
Also other suggestions from ususm like low idle and CnQ enabled.

Also like set my voltage to 0.6 - offset as there was a spreadsheet with values and scores there wasn't much difference.

opethdisciple · 1 May 2020 at 13:52

Kevin Matthews said:
PBO auto
boost override +200
c-States enabled
CPPC enabled
Also other suggestions from ususm like low idle and CnQ enabled.

Also like set my voltage to 0.6 - offset as there was a spreadsheet with values and scores there wasn't much difference.

So you mean your not punching in any values and just setting it to auto values?

Yaayuh! · 1 May 2020 at 14:02

There are so many variables that there can’t be an optimal setting for all.
Motherboard manufactures, power delivery, chip quality, FIT, cooling etc.

Whilst there should be a rough guide and more than just cramming numbers in and seeing what sticks, I can’t see there being an optimal set for all.

For ref, I keep it simple and use either stock with I’s power plan, and enable Performance Enhancer 3 for benching/testing.

Kevin Matthews · 1 May 2020 at 14:13

opethdisciple said:
So you mean your not punching in any values and just setting it to auto values?

Iam putting values in the amd overclocking section but just keep PBO to Auto but with manual XFR

Brizzles · 1 May 2020 at 15:01

By ' Optimal ' i'll assume you mean maximum.

Using 'default' PBO Disabled this is the result ;
TDC 90 limit 95%
EDC 140 limit 99%
PBT 142 limit 100%

Using Buildzoid settings ( 333/230/230 x 2 )
TDC 95 limit 26%
EDC 145 limit 30%
PPT 150 limit 21%
Changing Buildzoid setting to 'motherboard' in BIOS ( which sets to the max the mobo will provide , i get the same.
The 'maximum' is set by your motherboards limits - which as far i can see cannot be bypassed.

EDIT ; CB20 wasn't pushing the cpu enough - Prime small FFTs gives it a good push.
TDC 120
EDC 156
PPT 171

opethdisciple · 1 May 2020 at 16:10

So it sounds like choosing the option to set the boards default XFR values is the right direction to go down.

What about scalar do we know what's a safe value to use? Aggressiveness.

Brizzles · 1 May 2020 at 16:53

opethdisciple said:
So it sounds like choosing the option to set the boards default XFR values is the right direction to go down.

What about scalar do we know what's a safe value to use? Aggressiveness.

Buildzoid said x4 ( x5 max) in a vid i watched.

Everything i've tested on this chip comes around to the same conclusion - Use AUTO

There are no mystery settings that will unlock any hidden boosts. XFR PBO/PBO2 all behave identical in as much as they do virtually nothing.

Temps ( which are easily managed ) / RAM / Silicon lottery are the only key performance factors.

I've spent hours testing BIOS combinations and voltages etc and guess what i run at now ?

CPU Voltage - AUTO
XFR PBO / PBO2 - Disabled

Skynet5 · 1 May 2020 at 18:16

Brizzles said:
Buildzoid said x4 ( x5 max) in a vid i watched.

Everything i've tested on this chip comes around to the same conclusion - Use AUTO

There are no mystery settings that will unlock any hidden boosts. XFR PBO/PBO2 all behave identical in as much as they do virtually nothing.

Temps ( which are easily managed ) / RAM / Silicon lottery are the only key performance factors.

I've spent hours testing BIOS combinations and voltages etc and guess what i run at now ?

CPU Voltage - AUTO
XFR PBO / PBO2 - Disabled

This all day long.

Just let the mobo do its stuff.

Kevin Matthews · 1 May 2020 at 21:37

lnoton said:
This all day long.

Just let the mobo do its stuff.

Well after doing the suggestions from few members over on computerbase, my system is running and boosting better than before plus lower temps.

Ryzen 5 3600 boosting to 4.375 on two preferred cores.

I had everything left on auto but glad I've my system now optimised for gaming, so stressful, but ryzen apparently benefits better with overclock ram which I've mine set to 3800mhz

Skynet5 · 1 May 2020 at 21:49

Kevin Matthews said:
Well after doing the suggestions from few members over on computerbase, my system is running and boosting better than before plus lower temps.

Ryzen 5 3600 boosting to 4.375 on two preferred cores.

I had everything left on auto but glad I've my system now optimised for gaming, so stressful, but ryzen apparently benefits better with overclock ram which I've mine set to 3800mhz

Thumbsup.

Tbf I do neg offset to get better all core, just enough before it effects single core.

Awahwah · 1 May 2020 at 22:25

lnoton said:
Thumbsup.

Tbf I do neg offset to get better all core, just enough before it effects single core.

This

Grim5 · 2 May 2020 at 00:18

AMD needs to clean this up. PBO should just be an on/off button imo.

opethdisciple · 2 May 2020 at 15:41

Grim5 said:
AMD needs to clean this up. PBO should just be an on/off button imo.

Also not duplicated in two separate locations in the BIOS. Honestly who the hell thought it was a good idea to duplicate parts of the bios? :confused:

They complain about the 16Mb limitation of the earlier x370 BIOS chips well it isn't helped by unnecessary bloat in the BIOS them selves in the first place.

opethdisciple · 2 May 2020 at 15:45

Brizzles said:
Buildzoid said x4 ( x5 max) in a vid i watched.

Everything i've tested on this chip comes around to the same conclusion - Use AUTO

There are no mystery settings that will unlock any hidden boosts. XFR PBO/PBO2 all behave identical in as much as they do virtually nothing.

Temps ( which are easily managed ) / RAM / Silicon lottery are the only key performance factors.

I've spent hours testing BIOS combinations and voltages etc and guess what i run at now ?

CPU Voltage - AUTO
XFR PBO / PBO2 - Disabled

Confused about this one a bit.

Surely that should be:

CPU Voltage - AUTO
PBO2 enabled
XFR AUTO

That will give it a little more headroom.

At least for me I see about 5%.

muon · 2 May 2020 at 15:46

Grim5 said:
AMD needs to clean this up. PBO should just be an on/off button imo.

It is just on/off if you ignore the manual option.

Enabled/Disabled/Manual(Advanced)

I certainly wouldn't want them to remove the Manual(Advanced) option.

Brizzles · 2 May 2020 at 17:13

opethdisciple said:
Confused about this one a bit.

Surely that should be:

CPU Voltage - AUTO
PBO2 enabled
XFR AUTO

That will give it a little more headroom.

At least for me I see about 5%.

Nope, does the opposite for me.

Screenshots show the clock speeds taken from a 2 minute run ingame ( same environment in game for both tests ) ;

Core Voltage - AUTO with XFR / PBO2 - DISABLED ( Average clock speed 4182MHz )

Core Voltage - AUTO with XFR AUTO / PBO2 ENABLED ( Average clock speed 4116MHz )

The minimum , maximum and average are all higher with XFR and PBO2 Disabled