pbo scalar on or off ryzen

reddit.com › r › Amd › comments › ltdtg3 › what_is_pbo_scalar

PBO scalar adjusts the FIT/FITness/FailuresInTime limit of your part by that factor. Normally, Ryzen CPUs firmware manages the frequency based on the thermals and voltage and it will reduce your frequency if it sees either of those two going into ranges that reduce the long term reliability of the part. Increasing that limit (at the user’s discretion and own risk, voiding warranty, etc.) can let your system sustain higher frequencies without being throttled. So by default, the scalar is 1x, factory default. If you increase it to 2x, it will double the limit, etc. up to 10x. You’ll have to see if it helps by trial and error because my own system sees zero improvement from this one and I have a 360mm AIO. Answer from RBD10100 on reddit.com

XDA Developers

xda-developers.com › home › cpu › 6 pbo settings you can change to make your ryzen cpu run even faster

6 PBO settings you can change to make your Ryzen CPU run even faster

March 29, 2025 - This is a bonus setting because, for most people, you shouldn't mess with the scalar in PBO. This increases the Failure In Time, or FIT, value of your processor. In short, it allows you to feed more voltage to the CPU if you're less concerned ...

reddit.com › r/amd › ryzen master defaulting pbo scalar to “off”

r/Amd on Reddit: Ryzen Master Defaulting PBO Scalar to “OFF”

February 28, 2023 -

I have a Ryzen 5 5600(Non-X) Curve optimizer ON; All Core Values -30 Control Mode: Auto OC PBO Scalar: ON

Works good keeping the Temps in a good range (idle & loaded) My issue is that when I restart, it seems that Ryzen Master or BIOS is turning off PBO Scalar. When I re-open RMaster it shows

Curve optimizer ON; All Core Values -30 Control Mode: Auto OC PBO Scalar: OFF

Even after being off or asleep it idles at about 65-70° until I Re-Apply the Profile (Re-Enabling PBO) where it decreases to 35-40°

Does PBO Scalar Reduce Temps? I though the Opposite.
is there a way to permanently “apply” the Profile even after Windows Boot?

Top answer

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Do your settings in BIOS once you find the limits in Ryzen Master. Then you wont have to rely on software messing up or not running correctly.

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PBO scalar should increase temps under an all-core load if it's working normally. In the Ryzen Master settings menu there's an option for "Persistent PCD Values." That will maintain your profile between reboots. Personally, I don't use Ryzen Master and use the PBO in the AMD section in the BIOS, as I've found it's the more reliable and less buggy approach. Not sure what exactly you have going on with your system, but it sounds like bugged behavior, so I'd suggest doing the same and using your BIOS instead of Ryzen Master.

Overclock.net

overclock.net › home › forums › amd › amd cpus

Guide - Fully optimise your PBO | Overclock.net

June 12, 2021 - — AMD Overclocking settings: • PBO: Advanced • PBO Limits: Motherboard • PBO Scalar: Manual / 10× • Max CPU Boost Clock Override: 150MHz • Platform Thermal Throttle Limit: Auto · Spoiler: AMD Ryzen 5800X Benchmark Results — Cinebench R23

reddit.com › r/amd › what is pbo scalar?

r/Amd on Reddit: What is PBO Scalar?

February 27, 2021 -

In my research it holds voltage longer with PBO to hold the higher frequency? This comes at the cost of temperature obviously but when i set a X10 scalar it doesn't just hold higher voltage it applies 0.5v more all the time to core VID...

I have a custom water loop with CPU under its own 560mm rad. Temps aren't an issue. Is it worth running scalar? Does it provide a measurable increase to single core clocks and how long they hold?

Top answer

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So by default, the scalar is 1x, factory default. If you increase it to 2x, it will double the limit, etc. up to 10x. You’ll have to see if it helps by trial and error because my own system sees zero improvement from this one and I have a 360mm AIO.

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In my testing it did very little and I keep it on Auto or 1x

Overclock.net

overclock.net › home › forums › amd › amd cpus

5700X and PBO Scalar | Overclock.net

September 15, 2023 - Also, raising pbo limits did nothing because none of my games uses 100% of the cpu so it won't reach higher than default pbo limits, only on cinebench and I'm don't use the pc for heavy multithread tasks, only for gaming and work. I noticed the voltage was a bit higher which makes sense but not much, something like +0.250 or 0.05 from the 1.32 without the scalar, now with it at 8x it goes to 1.370, 1.360. If I leave the cpu on auto voltages go up to 1.430 1.420 1.460 and get less speed and higher temps. Ryzen zen 2 is very complicated.

GamersNexus

gamersnexus.net › guides › 3491-explaining-precision-boost-overdrive-benchmarks-auto-oc

Explaining AMD Ryzen Precision Boost Overdrive (PBO), AutoOC, & Benchmarks | GamersNexus

July 16, 2019 - We also ran two further passes with the 3900X in the Godlike board with the CLC fan and pump speed slowed, PBO on and off, to see whether Overdrive is more helpful when the CPU is warmer. On the X570 Master with the R5 3600 and PBO disabled, Cinebench R20 scored 3759 multithreaded/484 single threaded. Simply setting PBO to “enabled” scored 3748/485, and setting PBO to motherboard limits (functionally the same as max), maxing throttle temp and PBO scalar, and applying the AutoOC 200MHz offset scored 3765/496.

reddit.com › r/overclocking › amd ryzen master pbo scalar default ratio

r/overclocking on Reddit: AMD Ryzen Master PBO Scalar default ratio

February 1, 2024 -

If i turn on the PBO Scalar in Ryzen Master, is it automatically setting a 10x ratio like in the bios?

Or is it below that.

Top answer

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....whoa what the fuck What kind of bios do you have where Precision Boost Scalar: Auto MEANS 10X?!? you don't want 10x. Unless you're trying to burn the chip out.

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Pbo scalar does nothing in my experience so I always just leave it at 1x which is auto

Tom's Hardware Forum

forums.tomshardware.com › home › cpus

Question - PBO - doing it wrong? | Tom's Hardware Forum

November 20, 2022 - Going for +200MHz and higher EDC setting might give you 5.05Ghz boosts in light bursty workloads on your gold star cores (all cores if you get per-core CO set up right) but they heat up quickly and pulls back on clocks sooner, and more, in heavy (Cinebench) workloads. The same with PBO Scalar settings. For my 5800X I find +25 or 50Mhz and a scalar setting of x2 is about optimum for Cinebench scores. But then a 5900X is dual-die so has somewhat different properties. Uninstall RyzenMaster and do it through BIOS.

Tom's Hardware Forum

forums.tomshardware.com › home › overclocking

[SOLVED] - Does PBO degrade the CPU? | Tom's Hardware Forum

April 17, 2020 - Scalar above 1x will degrade your cpu faster. PBO is fine though. ... PBO is one of main selling points AMD has for Ryzen, don't see how could that void warranty or even have any effect on CPU's longevity.

Find elsewhere

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reddit.com › r/overclocking › question about pbo scalar on ryzen 5000 and pbo + co boosting behaviour and longevity

r/overclocking on Reddit: Question about PBO Scalar on Ryzen 5000 and PBO + CO boosting behaviour and longevity

March 21, 2022 -

From what i've been reading online opinion on PBO scalar has been a mixed bag. Alot of people have recommended to run Scalar at 1x and others have recommended it at 10x or 2x or 4x. Previously with the 2700X it was recommended to just leave this at AUTO but with my current 5600X i seem to be getting better results and stability with it at 10X. I have +200Mhz and CO tuned which gives me the following results at high temp (28-30c) ambient.

CB R23 MC: 11929 CB R23 SC: 1595

CPU Z MC: 5140 CPU Z SC: 660

Temps while gaming are in the mid 60s and highest i've seen it reach 71c while the clocks are 4.725-4.8Ghz. This is with a 240mm Deepcool L240 v2 AiO.

Lower Scalar of Auto or 1x give me slightly worse performance but I am mostly concerned that is it safe to have it at 10X. Something to also note is that i can do -15 on the worst core with Scalar at 10X compared to -10 when Scalar is at 1X.

Top answer

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If you understand what it does, you can answer that question for yourself. Blindly punching in numbers and hoping for the best is not a good approach. From another post: " PBO scalar adjusts the FIT/FITness/FailuresInTime limit of your part by that factor. Normally, Ryzen CPUs firmware manages the frequency based on the thermals and voltage and it will reduce your frequency if it sees either of those two going into ranges that reduce the long term reliability of the part. Increasing that limit (at the user’s discretion and own risk, voiding warranty, etc.) can let your system sustain higher frequencies without being throttled. So by default, the scalar is 1x, factory default. If you increase it to 2x, it will double the limit, etc. up to 10x. You’ll have to see if it helps by trial and error because my own system sees zero improvement from this one and I have a 360mm AIO. "

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How are you testing core optimiser? How different are the scores? I'd look at a variety of tests, Geekbench, y cruncher, etc. See that a good score in one isn't poor elsewhere. Adobe comment about warranty, I've also seen a few opt against scalar, but think any PBO technically voids warranty.

reddit.com › r/amd › question about pbo scalar x10

r/Amd on Reddit: Question about PBO scalar x10

April 16, 2021 -

I've been playing around with my 3700x settings, I realised that when I set scalar to x10 I start getting that juicy 4.4Ghz more often than stock and I'm happy with performance, I also have LLC set to mode 3 on my MSI x570 MPG Gaming Plus, voltage doesn't exceed 1.490mv on light loads (same as scalar x1), max temp was 50c, please note that I use CTR hybrid profile for multicore tasks so whenever the CPU usage exceeds 30%, the profile activates and it sets to 4.3Ghz all cores at 1.325mv then at 80% it sets to 4.15Ghz at 1.244mv.

So I made sure that stock settings with scalar x10 only runs on light loads like gaming.

Is this safe?

Top answer

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While I personally can't attest to it, I have heard that running PBO scalar at 10x is a very bad decision for mobo/CPU longevity. I do not know exactly how accurately that is. I know AMD recommends 2-3x or keeping it stock, typically.

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This will be long and sorry for grammar, new phone with a tiny keyboard haha. Scalar is good if you limit PPT, with high scalar x10 I could hit 4.5ghz all core boost in gaming on my old 3900x. What I recommend is to look at voltage during ST and MT tests. My 3900x I had my vcore set to normal in the gigabyte BIOS so i could adjust the dynamic vcore to -.025v which is just an offset as 3000 series dont have curve adjustment. I then set PPT to 145 and TDC to 230 and EDC to 1 (for edc bug to get high single boost in games, allowed comparable performance to my 8700k @5ghz). Also had a scalar of x10. Do note this was on f12h bios for the aorus xtreme so it was quite well before the ryzen 5000 bios which stopped the edc bug working. Anywho so if you want to know if your pbo settings are safe, do a prime95 test, ensure hwinfo64 polling rate is set to 500ms instead of 2000 as this will capture accurate data as ryzen changes many times per second. Only have that polling speed for stability testing not benching as it chews more cpu time to poll fast. During prime95 if smallest fft all core goes above 1.26v back off the scalar in 1x increments OR lower PPT. Single boosting usually doesnt go over 100w and a 3900x 145w cap saw me get 1.24v in smallest fft. Due to your lower core count you may need a lower ppt limit to go under 1.26v in prime95. Once you have it under 1.26v all core, test single thread by literally browsing the web or doing CB R20 single thread. If it goes over 1.5v you need to back off of scalar, ppt lowering wont help you here because it will destroy your multi core performance. If you need to back off of scalar for single core voltage, find the sweet spot for single voltage then go and increase ppt until you have single under 1.5v and multi under 1.26v under load. This will ensure your silicon stress is fine and you wont degrade your chip. Doing these tests for a few minutes wont damage your chip as long as temps are fine. If you run it like that for weeks though you can expect max boost to degrade if above those voltage limits. Basically in hwinfo64, all-core over 1.26v with edc/tdc in hwinfo over 140+ will degrade, some have been ok at 1.296v but i dont know how they went long term. For single the edc1 setting uncaps edc in single boost so over 1.5v with 95-100 edc/tdc showing in hwinfo64 will also degrade your chip. If you can find your balance and remain within those limits you should get the best of both st and mt for your chip. Best of luck.

Tom's Hardware Forum

forums.tomshardware.com › home › cpus

[SOLVED] - What is the best safe PBO scalar for 3700x? | Tom's Hardware Forum

September 18, 2020 - Auto or 10x is not visible in normal work, not even for short benchmarks... Click to expand... I don't agree...but I would agree it will depend a lot on unique system pecularities and how it's set up. On my system I have to enable PBO (take it out of DISABLED) to expose the setting, with PBO in AUTO it does basically nothing whatever scalar value I choose.

XDA Developers

xda-developers.com › home › cpu › 3 reasons amd pbo is important for your new ryzen cpus

3 reasons AMD PBO is important for your new Ryzen CPUs

November 13, 2024 - You can start by setting PBO scalar to 10X, CPU boost clock to +200MHz, and Curve Optimizer to -10. If you're getting a 2-5% improvement in performance and your system is stable, you can continue using these settings.

reddit.com › r/ryzen › ryzen master pbo scalar defaults to off.

r/ryzen on Reddit: Ryzen Master PBO Scalar Defaults to Off.

February 28, 2023 -

I have a Ryzen 5 5600(Non-X) Curve optimizer ON; All Core Values -30 Control Mode: Auto OC PBO Scalar: ON

Works good keeping the Temps in a good range (idle & loaded) My issue is that when I restart, it seems that Ryzen Master or BIOS is turning off PBO Scalar. When I re-open RMaster it shows

Curve optimizer ON; All Core Values -30 Control Mode: Auto OC PBO Scalar: OFF

Even after being off or asleep it idles at about 65-70° until I Re-Apply the Profile (Re-Enabling PBO) where it decreases to 35-40°

Does PBO Scalar Reduce Temps? I though the Opposite.
is there a way to permanently “apply” the Profile even after Windows Boot?

Top answer

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You are better off doing those kind of adjustments in bios and uninstall Ryzen master altogether

SkatterBencher

skatterbencher.com › home › amd precision boost overdrive 2

AMD Precision Boost Overdrive 2 - SkatterBencher

July 27, 2024 - Fmax Offset, or Boost Override, does not have that much of an impact unless you also use the other PBO tools. If we look at the Effective Clock Frequency distribution, we can see that even during two back-to-back runs of Geekbench 5, more than 60% of the time the system is effectively idle. The Scalar is supposed to force the CPU to pursue higher voltages more aggressively.

reddit.com › r/ryzen › new pc should pbo enhancement be turned on?

r/ryzen on Reddit: New PC should PBO enhancement be turned on?

January 9, 2026 -

I have a new PC with Ryzen 7 9800x3d, 360mm AIO, 9070XT

Should this be at Normal or PBO enhancement turned on? I don't want anything that taxes the system crazy and not sure exactly what this does or how it helps

Thank you!

Top answer

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Not for an x3d chip. Theres no real gains

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There are better settings for x3d chips, try curve optimizer

reddit.com › r/overclocking › scalar: 1x vs auto vs 10x

r/overclocking on Reddit: Scalar: 1x vs auto vs 10x

April 6, 2025 -

There are so many different opinions. What’s the actual correct response? Is it based off of chasing benchmark high scores versus daily use? What’s the consensus here?

Im using the 9800X3D with X870E Taichi and Noctua NH-D15-G2

Top answer

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The scalar value adjusts how aggressively the CPU pursues high voltages at high boost clocks. This is why running high scalar values usually has no performance impact. Most chips either aren't running fast enough to need the extra voltage, or the associated temperature increase negates the stability benefit. Yes, this does technically increase degradation risk. I have never seen hard proof of degradation, but because the benefit is so small I advise 1x scalar for daily use.

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if you have read the previous discussions and remain confused, i don't think a new discussion will change anything as there will be no new arguments. so i'll just state that i'd keep it at 1x, especially if you don't see any performance improvements that matter after testing different values. now the degradation we are talking about is a slow progress, not an insta death. which means you can examine the effects if you want with a few test runs.

Linus Tech Tips

linustechtips.com › computer hardware › cpus, motherboards, and memory

PBO and CO questions. new to this. - CPUs, Motherboards, and Memory - Linus Tech Tips

February 11, 2025 - is it safe to turn on pbo (have everything on auto) and turn curve optimizer to -30? will that degrade the CPU or give me a warranty issue if i should ever need to RMA my 9800x3d?

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Ryzen 7000 users: Do you use PBO Scalar?

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Albert Herd

albertherd.com › 2020 › 12 › 13 › my-experience-with-precision-boost-overdrive-2-on-a-5900x

My Experience with Precision Boost Overdrive 2 on a 5900X – Albert Herd

January 13, 2021 - With PBO turned off, I was sustaining around 4.1 GHz core clock and with PBO on, I am sustaining between 4.4-4.5 GHz in Cinebench R20. ... Simpler workloads (non AVX) will clock past 4.5 GHz. I suspect that Ryzen calms down the clocks by a bit during AVX workloads, but I cannot confirm this.