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post #31 of 40 (permalink) Old 07-18-2019, 03:58 PM - Thread Starter
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Quote: Originally Posted by ShrimpBrime View Post
ShrimpBrime - 2700X single core boost at 4350 from the box. My max on a single core static oc (manual multi) was 4500Mhz.

No?? OK then..... Max PBO all core boost auto AI overclocking is only 4.0Ghz. With all on auto, multi OC static will do 4.1Ghz change nothing but the multiplier.

What exactly is this thread aimed at? All core boost or single core boost? What is the correct reply above??
Precision Boost Overdrive This is a new AMD overclocking tool that voids warranty if used.It has nothing to do with old Ryzen CPU (2600X/2700X)AMD did a poor job I guess in explaining stuff ,only effects Ryzen 3xxx CPU's.
It is overclocking and there is no single core boost or all core boost.Read the first post and I was trying to make people aware of how the Precision Boost Overdrive works and it works,for me it is 4-6 of 12 cores when turned on 99% of the time.
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post #32 of 40 (permalink) Old 07-18-2019, 04:00 PM
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Quote: Originally Posted by gerardfraser View Post
Precision Boost Overdrive This is a new AMD overclocking tool that voids warranty if used.It has nothing to do with old Ryzen CPU (2600X/2700X)AMD did a poor job I guess in explaining stuff ,only effects Ryzen 3xxx CPU's.
It is overclocking and there is no single core boost or all core boost.Read the first post and I was trying to make people aware of how the Precision Boost Overdrive works and it works,for me it is 4-6 of 12 cores when turned on 99% of the time.
PBO is not new, it was enabled with second generation Threadripper and some motherboard vendors such as ASUS implemented it for 2000 series Ryzen though not officially supported by AMD (see pic below). It's less of an 'overclocking' tool and more of a limit remover for Precision Boost to let it boost for longer.
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Last edited by chakku; 07-18-2019 at 04:38 PM.
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post #33 of 40 (permalink) Old 07-18-2019, 04:32 PM - Thread Starter
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I owned a 2600X I know how it worked also.I am not going to argue with you over trivial crap,if you want to argue please go elsewhere and find someone else to mess with.Precision Boost Overdrive works as intended by AMD and it works for me.that is all I have left to say.
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post #34 of 40 (permalink) Old 07-18-2019, 04:39 PM
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Quote: Originally Posted by gerardfraser View Post
I owned a 2600X I know how it worked also.I am not going to argue with you over trivial crap,if you want to argue please go elsewhere and find someone else to mess with.Precision Boost Overdrive works as intended by AMD and it works for me.that is all I have left to say.
Relax. If it's trivial at least get your facts straight, there's enough misinformation flying around at lightspeed as it is.

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post #35 of 40 (permalink) Old 07-18-2019, 05:21 PM
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I hit 4448 on all cores just by opening a few programs all at the same time. I have not been able to reproduce that effect but this current bios hits max boost on all cores every time I load anything.
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post #36 of 40 (permalink) Old 07-19-2019, 01:55 PM
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Quote: Originally Posted by gerardfraser View Post
Precision Boost Overdrive This is a new AMD overclocking tool that voids warranty if used.It has nothing to do with old Ryzen CPU (2600X/2700X)AMD did a poor job I guess in explaining stuff ,only effects Ryzen 3xxx CPU's.
It is overclocking and there is no single core boost or all core boost.Read the first post and I was trying to make people aware of how the Precision Boost Overdrive works and it works,for me it is 4-6 of 12 cores when turned on 99% of the time.
This post and the title contradict each other. You want to know how much over "max boost" people are achieving. I asked a few simple questions really didn't get an answer yet.

Here is thread title.
Quote:
: Precision Boost Overdrive How Much Over Max Boost You Have Reply to Thread
More questions....

Does 4-6 cores count as overclocking? Should it matter if it's core 0 or 8..... or multiple cores or ALL the cores.

With SMT off, I can get 750Mhz over base clock with static OC. Does that count?


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post #37 of 40 (permalink) Old 07-20-2019, 05:02 AM
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Quote: Originally Posted by gerardfraser View Post
Precision Boost Overdrive This is a new AMD overclocking tool that voids warranty if used.It has nothing to do with old Ryzen CPU (2600X/2700X)AMD did a poor job I guess in explaining stuff ,only effects Ryzen 3xxx CPU's.
It is overclocking and there is no single core boost or all core boost.Read the first post and I was trying to make people aware of how the Precision Boost Overdrive works and it works,for me it is 4-6 of 12 cores when turned on 99% of the time.

Quote: Originally Posted by chakku View Post
PBO is not new, it was enabled with second generation Threadripper and some motherboard vendors such as ASUS implemented it for 2000 series Ryzen though not officially supported by AMD (see pic below). It's less of an 'overclocking' tool and more of a limit remover for Precision Boost to let it boost for longer.
PBO was feature of Zen+, so officially 2000 series X had it and all Threadripper 2xxx.

Below table highlights which mobos where supposed to have it, only the past gen chipsets (exc.X399) where not supposed to have it, but some mobo makers did implement it.

Spoiler!


The 3000 series PBO has CPU clock limit override feature, this was once mentioned by The Stilt is possibly coming to 2000 series, see this post.
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post #38 of 40 (permalink) Old 07-22-2019, 08:00 AM
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3800x All Core Success

Quote: Originally Posted by The Stilt View Post
Obviously you are entitled to have an opinion
Note that the scenario below is power limited (PPT), but I've tested adjusting the scalar value under several different conditions.
Even when the CPU is completely unlimited in terms of PPT, TDC and EDC, increasing PBO Scalar (FIT ceiling) does not increase the allowed voltage and therefore the maximum achievable frequency.
For example on Pinnacle Ridge, increasing the PBO scalar allowed significantly higher voltage in all conditions. On Matisse the allowed voltage is the same, regardless if the PBO is either 1x or 10x.
Because of the voltage limit, this CPU won't boost higher than 4.175GHz on all cores, regardless of the removal of all limits and despite the fact that the tDie is with well within the spec.

Maybe it depends on the silicon characteristics, but that's the case on this 3900X specimen at least.
IIRC I also checked it on the 3700X and the results were the same.
Just installed my 3800x. I'm running AGESA 1.0.0.3AB within Beta 5.61 for ASROCK X370 Taichi. Also, I am using a Corsair AIO - 360 which provides for 3 120 fans on the radiator. In addition, I have a 120 fan on the VRMs.

My memory is xFlare 3200 cas 14. But for expediency, I am still using the bios default for my memory at 2400. (My wife needs this computer this week for insurance work. I'll OC memory at the end of the week.)

My boosts using PBO Scaler 1x are all core 4.150 - 4.200 Ghz. With 2x I get 4.200 - 4.250Ghz! (On this run, I had two cores hit 4.525Ghz, which I think is the microcode limit for the 3800x.)

Here are some grainy photos I took. Vcore is around 1.331 - 1.3625 but occassional millisecond spike to 1.4786.
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post #39 of 40 (permalink) Old 07-22-2019, 10:53 AM
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3800x - New Results for PBO Scaler 3x

You will see higher vCore at this OC level.
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post #40 of 40 (permalink) Old 08-06-2019, 08:56 PM - Thread Starter
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Guess my 3600X is getting like that AMD fine wine treatment with age:Boost override now up to 4580Mhz.



EDIT:Added some screens to try to get my stupid point across somewhat.The CPU's can boost higher than what's written on the box and there is show much BS out there that they can not.It is all in the BIOS really.

Cinebench 20 all cores hit and past Maximum boost written on the box of 4400Mhz

Valley Benchmark all cores hit and past Maximum boost written on the box of 4400Mhz.




Screens from video if you do not want to look at the boring stuff.


Cinebench20

Core 0=4450Mhz

Core 1=4450Mhz

Core 2=4425Mhz

Core 3=4425Mhz

Core 4=4400Mhz

Core 5=4400Mhz


Valley Benchmark

Core 0=4525Mhz

Core 1=4525Mhz

Core 2=4425Mhz

Core 3=4425Mhz

Core 4=4400Mhz

Core 5=4450Mhz


Last edited by gerardfraser; 08-10-2019 at 04:37 PM.
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