pbo scalar on or off 5800x

reddit.com › r › AMDHelp › comments › 12cag42 › pbo_scalar_with_5800x

Anybody know anything about doing this kind Overclocking to an 3960x Thread ripper? Answer from Orionstheone on reddit.com

reddit.com › r/amdhelp › pbo scalar with 5800x

r/AMDHelp on Reddit: PBO Scalar with 5800x

April 5, 2023 -

Somewhat relating to thisthread, but I adjustments manually of my pbo curve per core, from what I understand this just raises the threshold/limit temp wise and down clock the CPU but for every CPU it's different.

My question(s) is how does this help my CPU if I have a 360mm aio? And to add, does it matter to turn it on if I could just adjust my TDP, edc, ppt values so my CPU isnt heating up as much during full load?

I've had it at 10x while adjusting my pbo curve values and find that things get pretty warm and am just now (after being informed to do it with scalar off) readjusting those accordingly so I can get results without tainted results.

Also I should mention yes I am a beginner at this and am only trying to understand to get the best out of my CPU possible, so save the "leave it at default" or "leave it alone" comments to yourself as I like many I'm sure want to learn with the help of more educated people on this sub. Thank you and have a great week everyone :)

Top answer

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Pbo on, scalar to auto or 1, long term high setting causes degradation, well reported too. Then adjust core optimizer co values per core towards -30, the closer to 30 on each the better. You will need to run corecycler and occt to look for errors and adjust as necessary Your CPU is fine up to about 90c and no need to panic with an 360 AIO unless it's faulty. Going negative will drop voltage per core and the temps, but the CPU will clock the same or higher due to lower temps.

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Anybody know anything about doing this kind Overclocking to an 3960x Thread ripper?

reddit.com › r/overclocking › help with my 5800x pbo settings

r/overclocking on Reddit: Help with my 5800x PBO settings

January 2, 2021 -

Can anyone help me understand how I can setup my curve optimizer? I've tried some stuff like -5 on all cores, or -10 on all and -5 on core #4 and #6 (Since Ryzen Master says they're the fastest). But it still makes me crash on low load after I load up windows and open something. I'm not sure I understood how put the negative offset to the right place. Which are my best cores?

Right now I'm just running this (my Motherboard is Aorus x570 ULTRA)

PBO Limits Set to: Motherboard

Scalar Set to: Auto

Curve Optimizer Set to: Disabled

Max CPU Boost Clock Override Set to: +200Mhz

My scores for Cinebench R23:

SC: 1576

MC: 14102

CPU-Z scores:

Single: 645.4

Multi: 6288.1

I feel like those scores are pretty low compared to everyone else who owns a 5800x.

Here's a screenshot of both my screen with Ryzen Master, R23, HWiNFO64 open for you guys to see and maybe explain me some stuff?

https://imgur.com/a/18mrMME

Thanks for anyone to any future help

Top answer

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Remove the +200 mhz your crashing cause it’s boosting to 5150 or higher at low voltages Scalar set to 6x or higher will also give it more stability So set your cores per core negative -10 now and see if it’s stable If it’s stable go to -15 and keep going down -5 per core till u crash Once you hit your wall go back to stable percore clock Then fine tune the curve optimizer by figuring out which one core is crashing you, and increase their -core counts on the other ones Once your done fine tuning add +MHz on your clocks like +25 then 50 then 75 till crash and then tone it down to the stable one.

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Hi This is my current setup for performance with the 5800x For now Im running a 5800x on the Unify x570 with A85 bios. Cpu is under a waterblock with liquid metal between IHS and block. I insulated the motherboard with electrical tape before seating the cpu and block. No idea how much it actually helps but seems my temps are a bit lower than normal even though I got a preatty hefty PBO/curv oc. The loop got a total of 600mm of rads to keep this hot head as cool as possible. Memory running(F4-3600C16D-32GTZN these are dual Rank dimms) at 3800Mhz 16-16-16-32, Trc 48 and Trfc 304 with CR 1. Mem clock and FCLK at 1900Mhz coupled. Voltage is set to 1.4v for the ram and I've used Ryzen calc to optimize 2nd and 3rd timings. For the last 24 hours I've been working on PBO and Curve Optimizer, and it seems I have come at least some way with it. So currently my PBO setup = Advanced, PBO limit = Auto, Scalar = manual and 10x, Boost clock overdrive = 200Mhz and Thermal limit = Auto. All voltages is set to Auto. Curve set in bios(negative offset): -21 for core 2 (Best) -23 for core 1 (2nd best) -25 for core 0 (3rd best) -25 for core 4 -25 for core 6 -27 for core 5 -30 for core 3 -30 core 7 Core speed will be fluctuate but hit 5050Mhz quite often in games. Cinebench scores look like: R15 = multi 2720 - singel 276 R20 = multi 6275 - singel 648 R23 = multi 16244 - singel 1649 Cpu-Z = 7008/677 PBO + Curve Optimizer results In Cinebench temp is about 76c for multi and 62c for singel core bench. Gaming temps are mid 50's to 60c

Overclockers UK

forums.overclockers.co.uk › hardware › cpus

5800X Boost set to 5050Mhz all cores with AMD Curve Optimizer | Page 34 | Overclockers UK Forums

November 10, 2020 - I've had some seemingly positive results with curve optimizer now 5800X 6189 multi 644 single PBO advanced PBO limits disabled PBO scaler x5 Curve on -20 for all cores except two good cores. Good cores (0 & 6 for me) on -5 Max CPU boost clock override 200MHz Platform thermal throttle limit 110 ... Check it more. Idle voltage reading is an artifact of Zen basically turning off cores in idle.

Overclock.net

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

5800x high heat and curve optimizer | Overclock.net

PBO is auto, voltage is auto and whenever i begin messing with PBO i get lower scores in cinebench. The only time i got higher scores is when i set limits to 390\250\160, add +100 OC and add all core curve optimizer to -10.

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 ... 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....

reddit.com › r/overclocking › advice: 5800x - pbo limits setting

r/overclocking on Reddit: Advice: 5800x - PBO Limits Setting

July 26, 2021 -

My final parts are arriving soon and I'm prepping for undervolting the 5800x CPU. I feel I have a handle on some core concepts of the undervolting process / testing using negative values in the curve optimizer, however I'm still fuzzy on the PBO Limits and scalar.

I've read / youtubed explanations of the PPT / TDC / EDC settings. I have a limited idea of what they do and that I can set them manually. My question is around the Motherboard / Default setting. What do these settings achieve and is there value in using them over the manual adjustments?

I'm not trying to reach ultimate Cinebench scores. I want to make a few adjustments to lower temps and maintain performance.

Additionally, I haven't found many undervolting examples discuss the scaler. I see a few people mention leaving it at auto and other saying it needs to be increased. Any input here would be appreciated as well.

Top answer

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The default limits for 105W CPUs: 142W PPT, 90A TDC, 140A EDC. Enabling PBO can raise those values to the maximum supported by the motherboard BIOS. PPT is the power drawn from the socket, TDC is sustained current limit drawn from the VRM, and EDC is the peak current limit drawn from the VRM. Keeping PPT and TDC lower can help thermals, with EDC it doesn't matter. You just have to find the sweet spot values for your CPU that have the right balance between performance and temperature. Keeping PPT low means your CPU isn't going to be drawing every watt it can from the socket, and keeping TDC low means the CPU isn't constantly drawing more current from the VRM than it normally would. Leaving EDC alone is fine because that's just a limit on the maximum amount of amps the CPU can draw from the VRM. EDC is often the first current limit to be maxed out, very rarely do I ever see TDC come close to maxed out even at stock, and PPT can be maxed out in all-core loads like CB. As for the Scalar, always leave it at Auto or 1. Scalar adjusts the amount of voltage that the Silicon Fitness allows, raising the multiplier will tell it to allow more voltage than it normally would, which can be detrimental to the silicon health because you're overriding the feature made to protect the silicon by limiting voltage when current draw and temperature are high. I wouldn't trust anyone who tells you to raise the Scalar to 10, because it makes PBO less safe, and it can make your CPU hotter because the CPU is getting more voltage than it normally would, which allows for more electromigration which could be bad for the silicon in the long run. The simplest ways to drop your thermals: Better cooling (Keep in mind that the FIT limits voltage based on current draw and cooling, so going from a subpar cooler to a higher end cooler can easily mean the FIT will allow more voltage, which can still even out the temps. Some tweaking is still necessary.) before tweaking the curve Disable boosting altogether and just run at the base clock (Worst performance but safest for the CPU and runs the coolest) Manual OC (Be extremely careful with the voltage, because changing the CPU multiplier disables the FIT, so it won't save your silicon if you have the voltage too high. I wouldn't ever recommend going above 1.25v unless you're never running loads that would have the voltage drop below that. 1.25v is fine for a 5800X, more than safe for a 5600X, and Ryzen 9 shouldn't run much higher than 1.2v, all assuming you have a decent AIO or air cooler like a Dark Rock Pro 4 or Liquid Freezer II 280/360/420.)

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Your temps in gaming won't change much with tweaking limits unless you starve the cpu. Limits will most likely only effect stress and bench temps.

HotHardware

hothardware.com › reviews › amd-power-curve-optimizer-guide-zen-3

Maximizing Ryzen 5000 Performance With AMD Curve Optimizer | HotHardware

Maximizing Ryzen 5000 Performance With AMD Curve Optimizer

Our Ryzen 7 5800X pushes itself as hard as the AGESA will allow it, and temperatures in any of these configurations never exceeded 80 degrees Celsius. Remember that we're trying to get the CPU to do more work in the same power envelope, so the numbers make sense. The one exception, which isn't charted, is using AMD's own recommended settings that included changing the PBO scalar ... AMD's new AGESA update adds simple controls for complex overclocking and under-volting that can bring nice performance gains.

Rating: 5

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 ...

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 - There are some CPUs and some cooling solutions where setting a high scalar makes sense, but for everyone else, it's best to leave it as default. Although there are a ton of options when you dig into the PBO settings in your motherboard, the ...

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reddit.com › r/overclocking › 5800x pbo settings...?

r/overclocking on Reddit: 5800X PBO settings...?

December 7, 2022 -

Hi everyone,

New owner of 5800X rig here. I made my fair share of investment to make my machine as quiet as possible and noticed that Noctua NH-D15 is good enough to warrant fair headroom for OC before taking off. I was fully aware that 5800X is quite hot out of the box, so I started tweaking nearly instantly with how to tame it - I managed to figure out the following using scattered info on this sub:

Curve optimizer per core, all cores at -30 (automatically set by Ryzen Master)
PPT/TDC/EDC: 120/80/120
Boost override CPU: 200
Temperature limit: 85*C (I set my fans curve to be as quiet as possible before 80*C mark, after they linearly scale with temp to 100% at 90*C)
FLCK & others - auto

I have not touched any other values to simply prevent myself from doing any damage to my mobo/cpu. Current Cinebench R23 score is 15294 compared to original 14100-ish, machine sustained Prime95 + Furmark for half an hour without being noisy nor any odd behaviors.

My CPU-related specifications:

Ryzen 5800X + Noctua NH-D15
Gigabyte AORUS ELITE v2 B550 (latest bios)
32GB 3600MHz CL16 Kingston Renegade Black
Seasonic PX-750 Platinum

Are there any other things I can try optimizing? Are any of those settings unnecessarily high/low? I do not mind "safe" overclocking, as long as it doesn't mean double digit wattage increases for tiny gains. Thanks!

Top answer

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I found the sweet spot for mine at +150boost and 0.0625v cpu negative offset voltage and -21 2 best cores 2 second best -27 rest -30. And ppt settings 139/160/200. Gives me r23 of 1667/16189 and 13200-13300 in timespy cpu score Games allcore is around 4800-4850 depending on load. Light games running 5ghz on 1-2 cores

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Hi folks, I’m tweaking my 5800x and trying to understand how PPT TDC and EDC work. Right now I have them 160/105/170 While I ran cinebench multicore test I see PPT loaded 75% of 160W, TDC 70% of 105A and 91% of 170A EDC. Should I try to lower them as much as possible to be loaded close to 100% or it doesn’t matter? Some people on YouTube set it to disable… Also, it’s not clear how scalar feature works, some people set it to auto, 1x or 5x. One more thing how to test and find best voltage offset for particular core? I have -25 for most of them and -10 and -15 for the best. Cinebench r23 15400 pts and 81C under the test. I use h100i Corsair

reddit.com › r/overclocking › 5700x - opinion about my pbo and co settings

r/overclocking on Reddit: 5700x - Opinion about my PBO and CO settings

December 26, 2022 -

Hello there! I recently bought a 5700x to replace my old 3600 on a b450-a pro max. Cpu works really good, i'm super happy i picked it, but of course, being a pc geek, i started trying to tweak the CPU using PBO limits, Curve Optimizer and AutoOC (from the BIOS, not Ryzen Master), so here it is my situation:

PBO Scalar: Auto (Appears OFF on ryzen master, probably cause i enabled Auto OC)

PBO Limits:

PPT: 140W
TDC: 140A
EDC: 100A

Curve Optimizer: -28 All cores. Tried -30 but pc restarted while in idle.

Boost Override CPU: +200Mhz

Result is that running Cinebench R23 or Prime95, just for few minutes tho, all my cores boost at 4.80/4.85Ghz with a really low voltage:

What do you think about it? Any suggestions?

Thanks and have a nice day :)

Top answer

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Use core cycler with ycruncher to test per core stability. -28 on all cores is almost guaranteed to not be stable. Check whea errors in event viewer, watch youtube videos and see if pc crashes after while but core cycler using ycruncher test gets errors pretty quick per core

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EDC should be equal to or more than TDC. Also you should be looking at effective clock speeds too to see if you are clock stretching. My personal method for finding pbo limits was setting TDC and EDC equal and finding the highest sustained boost I can achieve before gradual, not quick, throttling. Then I lower TDC so that the cpu boosts until it reaches throttle temperature but does not decrease performance or clocks while maintaining consistent temperature. Usually your best cores will have less undervolting in CO because they are already efficient. Also, setting the max boost clock shifts the voltage curve because there is a speed that the cores are now trying to reach so your CO values may be affected. Try increments of +50 for max boost if you want to increase it and see if any core hits that max, how long it does it for, and how often. Hope this helps :). Edit: Fixed first sentence. Should be equal to or more than.

reddit.com › r/overclocking › i changing the pbo settings on a 5800x

r/overclocking on Reddit: I changing the PBO settings on a 5800x

June 23, 2022 -

After overclocking the ram I wanted to try buffing up the cpu. What i learn is that PBO is the way or a static OC. But i don't understand vdrop.

I decided to go with the PBO settings. After doing some reading. The defaults are for a am4 105w chip PPT 142 > 152 PDC 95 > 98 EDC 110 > 110

LLC to 3

The temperature went up to 82c during r20 the score when from 5380 to 5542

My only question is. Are those settings too aggressive? To run it on a daily.

I also noticed when i had the PDC and EDC between 80 and 90 the core clocks during r20 never got over 3.6 GHz when i put the others ones. The core clocks got to 4.6 Ghz. With a top speed of 4.9 Ghz

I wonder if I did it right.

Top answer

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Don't mess with the voltage or LLC when using PBO. Ryzen CPUs have an entire sub-chip that handles voltage / current and LLC, just leave them on auto. Now I know individual results vary but for most 5800x I've seen PPT 142 / TDC 95 / EDC 125 seems to be the sweet spot combined with +150 frequency offset and a tuned Curve Optimizer ( start out with -15 on all cores then use core cycler to test and tune from there) This got me both better all core performance and significantly better single core that consistently hits 5ghz in games.

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Do 105 85 105. Mine hits 4.65 all core 5ghz single. 72 degrees max load.

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

Linus Tech Tips

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

Help with Ryzen 5800x undervoltage/overclock using PBO 2.0 - CPUs, Motherboards, and Memory - Linus Tech Tips

February 18, 2021 - So recently build a setup with Ryzen 5800x, MSI x570 Tomahawk, Arctic liquid freezer II 360 and ive been struggeling with applying a decent undervoltage/overclock. Heard that precision boost Overdrive 2.0 (PBO) is a great way to get some extra out of the CPU while reducing the temps (Which where ...

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

reddit.com › r/amd › pbo with 5800x

r/Amd on Reddit: PBO with 5800x

February 26, 2021 -

I upgraded from a 2600 to 5800x with an x570-f (no curve optimiser yet) so I haven't used PBO before, I'm wanting to know what kind of settings to adjust. I enabled PBO and set the max boost to 200mhz and I've done some testing with cinebench but I'm having inconsistent results, sometimes there is no change and other times I see a single core increase from 4.85 ghz to 4.925ghz (67c temp).

I've seen 5.05ghz recorded once but have not hit it since. I'm seeing that most people are enabling PBO and hitting 5.05ghz straight away. Is this a cooling/bios issue or do I need to increase some of the other limits like ppt and edc? The Voltage is sitting at 1.45v under single core load.

Top answer

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You won't hit high clocks under benchmarking. You will though if you play a game.

Under constant and full load, the CPU will default to 1.35 volts and run a constant ghz, normally between 4.5-4.7ghz

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PBO increases average clocks on the whole cpu which is good for most games as well as single core clocks. That said, you got the expected results, it works fine.

Albert Herd

albertherd.com › 2021 › 01 › 16 › overclocking-your-zen-3-ryzen-5000-with-precision-boost-overdrive-2-and-curve-optimizer

Overclocking your Zen 3 / Ryzen 5000 with Precision Boost Overdrive 2 and Curve Optimizer – Albert Herd

January 17, 2021 - Hi guys Amd 5800x asus b550f I messed up with pbo settings: curve -30 Pbt 185 Tdc 125 Edc 170 It was stabke with the same at -25 and pretty cool. Now it doesnt boot. Tried bios update and reset but red light is fixed. May have damaged it?

Linus Tech Tips

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

Best pbo settings for 5800x? - CPUs, Motherboards, and Memory - Linus Tech Tips

December 17, 2022 - Just for transparency, my cpu isn't overheating and the most it will ever reach is 80 degrees (which will eventually drop itself down to 50-60s very shortly). And I've never used this tool before too. But I've heard that you can modify your pbo settings in a way that you still get good performanc...

Overclock.net

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

5800X3D Owners | Page 299 | Overclock.net

April 16, 2022 - All core -30OC with PBO scalar@10x will also help with maintaining higher boosts. Click to expand... Scalar above 1x doesn't take on the 5800X3D on any board I've tried.