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Ryzen BIOS Tweak Test For PBO Override Boost clocks

gerardfraser

gerardfraser

gerardfraser

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27 Apr 2014
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859
Tested the tweak and thought I would drop this here for anyone interested.Tweak has been around since July/August but works good now with updated Motherboard BIOS/AMD Chipset.

Here is one thread on the tweak,there are others.Read thread if you want to try it out.
https://www.overclock.net/forum/13-amd-general/1741052-edc-1-pbo-turbo-boost.html

AMD 3800X Battlefield 5 2560x1440 Ultra settings

Default BIOS setting @60 FPS Cap- CPU Frequency Range 4350Mhz - 4425Mhz - Avg 4400Mhz
BIOS boost EDC set to 1A @60 FPS Cap- CPU Frequency Range 4475Mhz - 4550Mhz - Avg 4525Mhz
BIOS boost EDC set to 10A @60 FPS Cap- CPU Frequency Range 4500Mhz - 4575Mhz - Avg 4525Mhz
BIOS boost EDC set to 1A @120 FPS Cap- CPU Frequency Range 4450Mhz - 4525Mhz - Avg 4475Mhz
 
Just FYI I saw a post on reddit about this "trick" and several people were getting BSOD after doing it so it's not stable for every chip
 
Grim5 said:
Just FYI I saw a post on reddit about this "trick" and several people were getting BSOD after doing it so it's not stable for every chip
Click to expand...

As it happens my view is it's not stable for most chips, not just a few.
The thing about EDC within PBO is that it's not static. Leaving PBO on Auto or just Enabled means that EDC get's altered on the fly by the PBO algorithm. Just setting it to say 1 or 10 limit's PBO, which it was never designed for.
In all my testing of this "trick", performance has always been better with PBO enabled, the manual setting of EDC is problematic at best and could even be dangerous for the life of the CPU. Snake oil is my view, don't go there peeps.
 
Interesting, this certainly gave my 3900x another 100Mhz boost clock in all situations. Now see 2 cores at 4.7ghz under very light load and six reach 4.6Ghz or over. Running the stock cooler.
 
LtMatt said:
Interesting, this certainly gave my 3900x another 100Mhz boost clock in all situations. Now see 2 cores at 4.7ghz under very light load and six reach 4.6Ghz or over. Running the stock cooler.
Click to expand...

Oh yes it will, but actually run a bench like CBR 20 and then watch that so called 4.7Ghz clocks result compared to just stock PBO.
 
LtMatt said:
Interesting, this certainly gave my 3900x another 100Mhz boost clock in all situations. Now see 2 cores at 4.7ghz under very light load and six reach 4.6Ghz or over. Running the stock cooler.
Click to expand...
Boost been around since July/August the first time I tried it.It just works better lately , one must find what works on there CPU and motherboard if they want to give it a shot.
Normal settings on Ryzen CPU's are fine also.Windows power plans have an affect on single threaded applications.Make your own for best results.

Also light gaming loads can hold 4600Mhz and up to 4650Mhz on 3800X.I could always hit 4650Mhz but never hold 4600Mhz.

Light gaming loads all core boost up to 4625Mhz Outlast 2 Peaks 4650Mhz
49430283162_81e7b480a2_k.jpg



Normal to heavy gaming loads all core boost up to 4575Mhz Red Dead Redemption 2 Peak 4600Mhz
49429583248_552b081b24_k.jpg


BF5 up to all core 4550Mhz Peak 4575Mhz
49430596161_bbcf927517_k.jpg


Last 4 Normal Cinebench20 single thread runs 534/534/530/530 seems ok to me
Desktop-Screenshot-2020-01-26-16-52-39-15.png
 
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thats very high clocks for games. my 3950x generally only does 4200mhz in games when its stock (i've not tried any of these tricks like pbo, auto oc etc just totally stock).

but in single core test like cinbenech single thread, the clocks go up to 4650mhz
 
kitfit1 said:
Oh yes it will, but actually run a bench like CBR 20 and then watch that so called 4.7Ghz clocks result compared to just stock PBO.
Click to expand...
I do get around 100Mhz higher in CB15 than before, so ill take that and similar in lightly threaded games.
 
kitfit1 said:
The thing about EDC within PBO is that it's not static. Leaving PBO on Auto or just Enabled means that EDC get's altered on the fly by the PBO algorithm.
Click to expand...

Not noted this do you have a source to reference?

AFAIK [Auto] uses fused limits, regardless if stock or PBO, 0 is same as [Auto] ie fused limits.

Group A (95W TDP): 128W PPT, 80A TDC, 125A EDC
Group B (65W TDP): 88W PPT, 60A TDC, 90A EDC
Group G (105W TDP): 142W PPT, 95A TDC, 140A EDC
Group H (45W TDP): 61W PPT, 45A TDC, 65A EDC
Click to expand...

I share Martin Malik's view that this a bug, link. Don't plan on trying this as believe it may not be good for the CPUs.
 
Limit FPS 60FPS To test tweak for CPU boost clock
Limit FPS 120FPS To test tweak for CPU boost clock

Shocking I offended someone on the internet.Now you inspired me to upload 30FPS and 165FPS caps.I will of course need your blessing and permission.
 
I am not offended I am legitimately asking what the video is supposed to show since it isn't obvious to me. Are you saying it's meant to show clocks? Fine but I think clocks are pointless, especially on Ryzen where clocks doesn't always translate into performance (e.g. clock stretching). Surely it'd be better to compare frame rates with these different settings?
 
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