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AMD
amd.com › https://www.amd.com/en.html › products › ryzen master utility
AMD Ryzen™ Master Utility for Overclocking Control
May 21, 2026 - The AMD Ryzen Master Tuning page enables you to create multiple profiles to store custom user-defined configuration for both the Ryzen™ CPU, integrated Radeon™ graphics and DDR5 memory. You can adjust performance parameters for the active cores, integrated graphics frequency, and adjust memory timings. You can optimize for general performance or fine tune the settings for your favorite applications.
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AMD
amd.com › content › dam › amd › en › documents › products › software-tools › faq-curve-optimizer.pdf pdf
FAQ - Curve Optimizer Feature in Ryzen Master What this feature is all about?
is introduced in the latest Ryzen Master release (Build # 2.9.0.2093). The primary functionality of this feature is to ... tune the AVFS curve of the entire CPU or specific cores of the CPU such that the tuning overrides the fixed curves that they are fused with, resulting in an ... Yes, both CPU and the internal graphics can be optimized. CPU can be optimized on ... Note: Automatic ...
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Hardware Canucks
hardwarecanucks.com › home › forums › pc builders & tweakers corner › overclocking, tweaking and benchmarking
Ryzen Master - Auto Curve Optimizer | Hardware Canucks
April 19, 2022 - I completely missed that this is now included in Ryzen Master? If so then I would probably try again myself if AMD are releasing a utility that supposedly is properly testing stability for undervolting. Most people just speculate and despite no WHEA occur, you will still have the random app c2d with a generic memory based error but is actually due to the CPU writing the corrupt data. Lmao... The upgrade for Ryzen Master is just opening DriverUtility.bat instead of executing...Edit: nvm its due to notepad++ as default editor, I would think that the engineer making the app would be defining execute not open with default application rofl.
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Reddit
reddit.com › r/amd › amd ryzen master 2.9.0.2093 introduces auto-curve and manual curve optimizer
r/Amd on Reddit: AMD Ryzen Master 2.9.0.2093 introduces Auto-Curve and Manual Curve optimizer
April 16, 2022 -

Not sure if I should have flaired this as discussion but I think news is appropriate since I couldn't find any mentions of these new capabilities on the sub. Mods, please change it if appropriate.

Version 2.9.0.2093 release highlights:

  • Adds support for Desktops utilizing AMD Ryzen™ 5000 processors

  • Adds Memory Overclocking support for AMD Ryzen™ 7 5800X3D

  • Adds support for AMD Ryzen™ Threadripper™ PRO 5000WX processors

  • Added Bug Reporting Tool for easy feedback and issue reporting

  • Introducing both Auto-Curve optimizer and Manual Curve optimizer for AMD Ryzen™ 5000 processors and AMD Ryzen™ PRO 5000WX processors

Full release notes: https://www.amd.com/en/support/kb/release-notes/rn-ryzen-master-2-9-0-2093

Ryzen Master main page and download source: https://www.amd.com/en/technologies/ryzen-master

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Reddit
reddit.com › r/amd › my findings with the new curve optimizer with amd ryzen master
r/Amd on Reddit: My findings with the new curve optimizer with AMD Ryzen Master
April 17, 2022 -

So I have done about 9-12 hours extensive testings.

--

You WILL have to know your max PPT, TDC, EDC else this is just waste of time doing it and you will just be using default values which give you more aggressive under-volt than you might had opted before manually before using this.

Make sure to set those values in bios before moving on else you will just see default values in there no matter if you pick auto oc, or pbo, this was the case at least for me it would not pickup anything else than default values in software until manually set in bios.

So go to bios set values for those and set everything else on auto in PBO menu.


Verify and run a test just to verify settings are applied like on this screenshot, you don't have to run a full test if your settings where not added correct, go back and do it again.

My 5900X can handle these

PPT 185

TDC 125

EDC 170

Screen after completion..

https://i.imgur.com/otgetEQ.png

Video running test being stable for now and screen from HWiNFO just after finished tests.


Setup

5900X B0 Stepping early unit, not first week tho.

Asus x570-I ITX - Bios 4204 with AMD AM4 AGESA V2 PI 1.2.0.6b

3080 FE

16GB F4-3600C15-8GTZ

SF600

All in a loque ghost s1 case with some vector EK cooling setup on all parts.

All this was done by upgrading to latest bios, resetting bios to make sure no old values was stock and I only touched RAM timings with and dram voltage and PPT, TDC, EDC, PBO scalar x10, overclock 200mhz, rest was injected by ryzen masters into the bios settings after hitting apply.


Overall AMD have done a amazing job with this, even noobs can overclock and undervolt proper now 10/10 AMD clap clap

Do you wish to do it your self grab latest version here

https://www.amd.com/en/technologies/ryzen-master

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XDA Developers
xda-developers.com › home › cpu › how to use amd ryzen master
How to use AMD Ryzen Master
December 12, 2024 - When you launch Ryzen Master and accept the warning message, you'll be greeted with the Home screen. This screen shows you sections like Temperature, Speed, Power & Current for system monitoring, including Control Mode, Curve Optimizer, and Cores Section options for any existing overclock details, as well as Voltage Control, Additional Control, and Memory Control for deeper overclocking information.
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Wccftech
wccftech.com › home › hardware › amd ryzen master utility adds auto & manual curve optimizer
AMD Ryzen Master Utility Adds Auto & Manual Curve Optimizer
April 17, 2022 - Introducing both Auto-Curve optimizer and Manual Curve optimizer for Ryzen 5000 processors and Ryzen PRO 5000WX processors · This build does require you to have a third-gen AMD Ryzen Desktop Processor installed onto an AMD X570 motherboard. Users are also required to run Windows 10 May 2019 Update or higher for the operating system. AMD does recommend uninstalling the previous version of Ryzen Master before installing the new build, but it is possible to be installed over the existing application.
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AMD
docs.amd.com › r › en-US › 68886-ryzen-master-user-guide › Curve-Optimizer
Curve Optimizer - 3.1.0 English - 68886
These are cookies that are technically required for the operation of the Sites. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging into secure areas of the Sites or filling in forms.
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Thinglabs
thinglabs.io › how-to-use-the-amd-ryzen-curve-optimizer
How To Use The AMD Ryzen Curve Optimizer - thinglabs
September 8, 2024 - It aims to lower voltage without sacrificing stability, resulting in potentially lower temperatures and potential performance gains. AMD Ryzen Master: Download and install the latest version of AMD Ryzen Master software.
Find elsewhere
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YouTube
youtube.com › watch
Curve Optimizer with Ryzen Master - Beginner's Guide to Overclocking the Ryzen 5000 CPUs w Optimiser - YouTube
How to overclock using Ryzen Master and the new Windows feature - Curve Optimizer. This is a beginner's guide updated with the latest techniques.Download Ry...
Published   May 23, 2022
Views   250
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Tom's Hardware Forum
forums.tomshardware.com › home › cpus
Question - Ryzen Master Curve Optimizer | Tom's Hardware Forum
September 6, 2024 - Click to expand... Last versions are working fine and even have refinements for Zen5. Still, it's just SW and so dependent and influenced by OS and other SW. Most if not all automatic OC and other settings are actually mild comparing to what you can force thru BIOS/UEFI.
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Make Tech Easier
maketecheasier.com › home › pc guides › how to overclock and undervolt amd ryzen cpus
How to Overclock and Undervolt AMD Ryzen CPUs - Make Tech Easier
January 18, 2024 - Note that Curve Optimizer is available only for Ryzen 5000 series processors or newer. Select either All Cores or Per Core next to Curve Optimizer Mode. We are proceeding with All Cores for automatic curve optimization.
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Tom's Hardware
tomshardware.com › pc components › cpus
How to use Precision Boost Overdrive and Curve Optimizer to improve Ryzen CPU performance | Tom's Hardware
March 11, 2026 - While undervolting can be achieved through your motherboard’s BIOS, AMD’s Ryzen Master software offers all the necessary tools to fine-tune your CPU, including Precision Boost Overdrive and Curve Optimizer.
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H|ard|Forum
hardforum.com › [h]ard|ware › amd processors
Ryzen Master - PBO Curve Optimizer Control - Configure in Windows Now! | [H]ard|Forum
April 20, 2022 - So I got my 5950X installed earlier ... give the auto-curve optimizer a go. It attempted to set everything to -30 offset which was so unstable that I had to reset my entire BIOS to get the system to boot again. I have a lot to learn it seems. ... My computer got shut down due to a quick power outage today. I can't use my UPS because my computer draws more power than it can handle. Anyway, I verified that Ryzen Master had put the ...
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VideoCardz
videocardz.com › news › processors › software and drivers
AMD updates Ryzen Master to support Ryzen 8000G series, Curve Optimizer now without restarts - VideoCardz.com
February 13, 2024 - AMD Ryzen™ Master Release Notes (2.13.0.2908) Release Highlights · Adds support for systems utilizing AMD Ryzen™ 8000G Series desktop processors for the AM5 platform · Curve Optimizer values can now also be applied on the fly (no need for system restart)
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Overclock.net
overclock.net › home › forums › amd › amd cpus
-=: AMD Ryzen Curve Optimizer Per Core + Curve Shaper + DDR5 OC :=- | Overclock.net
January 19, 2025 - My Reboot to UEFI shortcut pack, link (Only works on UEFI system, ie CSM: Disabled which normal defaults these day) Ryzen dual CCD Average Effective Clock per CCD sensor read out in HWINFO reg, link ... You can edit the duration, the test sets that will run, you can change the message at end, edit echo Fin!. Articles Links Raphael Overclocking: What’s New, link. Granite Ridge Overclocking: Curve Shaper, link.
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Reddit
reddit.com › r/overclocking › a(nother) guide to ryzen 5000 curve optimization
r/overclocking on Reddit: A(nother) Guide to Ryzen 5000 Curve Optimization
August 4, 2023 -

This is free performance that I hadn’t taken advantage of in the year I’ve owned my Ryzen 5600, so I’m writing to this to advocate that nobody else wait as long as I did.

This is my guide. There are many like it, but this one is mine😁.

Curve Optimization is very easy - the testing being automated - and poses no danger whatsoever to one’s hardware; the worst you can expect is a Windows bluescreen, and that is no more deleterious than stalling a car. The only drawback is that you will need to have your computer running tests that render it useless – if you are prepared to leave it running overnight and/or while at work, though, this is not a problem – and it can take a long time.

1. Software (all free)

You will need:

  • AMD Ryzen Master (latest version)

  • HWINFO (to get the preferred core order and, optionally, compare before and after temps/power)

  • Core Cycler (which contains PBO2Tuner – set and test curve optimizer values)

  • CPU and gaming benchmarks (compare before and after performance, test for real-world stability)

2. Preliminaries

  • Open HWINFO and uncheck both boxes, then navigate to “Central Processor(s)”-> <your CPU>. Make a note of the sequence after “Core Performance Order” – this is the order in which we will be testing them with Core Cycler, but you must SUBTRACT 1 from each value; Core Cycler starts numbering cores at 0, not 1.

  • Open AMD Ryzen Master, select Advanced View, click Curve Optimizer, Per Core, then click Start Optimizing. Ryzen Master will then enter an automated procedure to generate its best estimate of what your CPU is capable of. Plan to be away from your computer for at least an hour while this is going on; when you come back, make a note of the values it generates, but DO NOT APPLY them - just close the program. Note that the “subtract 1” rule applies to Ryzen Master, as with HWINFO.

  • Open the Core Cycler config file and make the following changes:

“stressTestProgram = YCRUNCHER”

“coreTestOrder = <your order from earlier>” - remember to subtract one from each

“numberOfThreads = 2”

“mode = 20-ZN3 ~ Yuzuki” in the ycruncher section, halfway down the page.

Some rationale:

The preferred core order is from WORST to BEST under-volter, and thus MOST to LEAST likely to fail – this is because the more preferred a core is, the more efficiently it is already running, and so the lower the voltage floor is. This makes testing faster because the most unstable cores will fail first, and dropped cores are left out of subsequent intra-session iterations by Core Cycler. Also, the ycruncher Yuzuki test is considered to be the most difficult one to pass, so we might as well start with it; you can – and should – run others afterwards.

  • Open Windows Event Viewer, right-click on Custom Views, and click Create Custom View. Check “Warning”, and “Error”, then “By source”, and check “WHEA Error” in event sources. Name the view something meaningful, then exit the Event Viewer. This is just in case Windows ever BSODs – not likely, but possible – and we will need to know which core failed.

3. Testing – Round One

Create a spreadsheet like the one below – we will be keeping track of passes and fails.

in the beginning...

When you’re ready to leave the computer alone, close all programs, open PBO2Tuner and key in the values given by Ryzen Master earlier, then click Apply, and minimize the program. These values are applied as though they were typed into the BIOS, and persist until they are changed, or the computer is restarted.

Run “Run CoreCycler” - the testing will begin, and will run until you stop it, or until every core has thrown an error.

~TESTING HAPPENS – LEAVE FOR AS LONG AS POSSIBLE, PREFERABLY 6+ HOURS~

When you come back to the computer, if Core Cycler is still running, stop it with Ctrl-C, and see which core/s, if any, have failed; Ryzen Master’s supplied values are usually rather optimistic, so you should expect some errors, which show up in bright purple text. (If you accidentally close the window, the log file contains all the same information, but is more annoying to parse.)

Scroll around the window and see how long it took for the core/s in question to error out – a fast error is anything under 10 mins, IMO, and a slow error is anything over. Any core with a fast error will be having its CO value increased by 2, while slows will have theirs increased by 1; if any cores don’t error (in which case, Core Cycler will still be running on those cores when you come to check), add them to the

“coresToIgnore =”

– no point hitting these cores again until Round 2.

(If the machine has reset, go into Event Viewer and look in your custom view – under Error, there will be an entry called “Processor APIC ID”, with a number, the number corresponding to a thread. Core 0 will run threads 0 and 1, Core 1, threads 2 and 3, and so on; whichever core was running the failed thread, increase its CO by 3 or 4 – that core was not even close to stable!)

Update your spreadsheet as shown below, with the adjusted CO values, and save it – when you are ready for your next test session, put these new values into PBO2Tuner before you start.

after first session

Keep repeating the above until all cores pass a session of this “all cores at once” testing.

after second session after third session

and so on; my last all-core session, after shedding cores as they passed, looked like this:

final all-core results

4. Testing – Round 2

The next step is to extend the testing for each core. You can jump right to hitting one core for 6+ hours (as I did), or divide the cores into two groups (“front half, back half”, from the order earlier, is best), and test them one half at a time, Ignoring the cores in the other half. This will double the amount of time each core is under stress, and might generate errors that didn’t appear before, but you will be much closer to the true stable value thanks to the previous testing.

Change the core testing order to match the results from Round One - they might not be the same as the HWINFO values; for example, HWINFO gave me 2 ,1 ,0, 4, 3, 5, but ordering by the results of my Round One, worst to best, would be 0, 1, 4, 5, 3, 2.

Do the “increment on error” procedure from before, until the front half all pass, and then do the same for the rear half.

5. Testing – Round 3-4-5

If you like, you can split the cores again, and repeat, getting all groups stable. Keep splitting until you get to the point where only one core is being tested at a time:

  • Ryzen 3 – four, two twos, four ones.

  • Ryzen 5 – six, two threes (or three twos), six ones.

  • Ryzen 7 – eight, two fours, four twos, eight ones.

  • Ryzen 9 – 5900 = twelve, two sixes, then each six as per Ryzen 5; 5950 = sixteen, two eights, then each eight as Ryzen 7.

Yes, this CAN be a lot of testing, but Curve Optimizer CPUs are most likely to crash at the highest boosts (= lowest loads), so sheer duration is the only way to generate any confidence in stability. Thankfully, Ryzen Master gets us most of the way there; the values it gives are usually stable enough at least for idle Windows tasks.

My last round of Yuzuki was a 40-iteration test on each core individually - 5-6 hours per core:

final results

From Ryzen Master's -28, -30, -30, -30, -30, -30, I ended up at -20, -21, -29, -26, -22, -26.

6. Further Testing

It is advisable to use the PRIME95 HUGE on each core in turn, as this is another very low load situation that lets the CPU boost to its maximum; make these changes in the Core Cycler config file. Feel free to try to some other presets as well – no such thing as too much testing. Read what other users found to be their “magic bullet” test settings, and try those out.

double-checking with P95

The best test, though, is, as always, to use the thing - browse, game, edit, do whatever you normally do.

7. Finalizing

When you’re happy that everything tests stably, go into the BIOS and enter your final values in the Curve Optimizer menu – this will save you having to use PBOTuner2 every time you boot up.

If your computer ever crashes (not impossible) use the Event Viewer to identify the rogue core, and increase its CO value in the BIOS.

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Tom's Hardware
tomshardware.com › pc components › cpus
Curve Optimizer Heads To Ryzen Master For Zen 3 CPUs | Tom's Hardware
April 16, 2022 - Curve Optimizer is now accessible within the software. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. ... AMD just released Ryzen Master version 2.9.0.2093, packing full support for the Ryzen 7 5800X3D processor and Ryzen Threadripper Pro 5000WX CPUs.
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YouTube
youtube.com › watch
Ryzen Master Simple Undervolt | Lower Temps | Increase Performance | 5000 & 7000 Series CPU - YouTube
How to undervolt AMD 5000 and 7000 series Desktop CPUs with curve optimizer per core. This video will show you the simple steps with Ryzen Master to test you...
Published   April 27, 2023
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Guru3D
guru3d.com › home › archive › july 2025 › categories › generic utilities › download amd ryzen master utility v3.0.0.4199
Download AMD Ryzen Master Utility v3.0.0.4199
July 25, 2025 - Change Info: RN-RYZEN-MASTER-3.0.0.4199 Release Highlights Adds support for systems utilizing AMD Ryzen™ Threadripper PRO 9000 WX-Series Processors for the TRX50/WRX90 platform Adds support for systems utilizing AMD Ryzen™ 9000 Series Desktop processors for the AM5 platform Added support for Optimized Performance Profile (OPP) - an optimized memory overclocking profile for supported memory configurations Switching to PBO Advanced control mode is on-the-fly (does not require a system restart) Added support for the Per CCD Curve Optimizer feature A completely redesigned UI for a better user
Rating: 4.8 ​ - ​ 491K votes