That's weird, I managed to get it working without getting flagged just by using folder exclusion, and I can do anything like apply offsets, limit wattage, mhz, etc... Answer from ataquemosle on reddit.com
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Reddit
reddit.com › r/amdhelp › pbo2 tuner doesn't work win11
r/AMDHelp on Reddit: pbo2 tuner doesn't work win11
January 31, 2026 -

Hey everyone, since summer started, my CPU, an r7 5700x3d, started getting really hot. Unfortunately, my motherboard is kinda old, so it doesn't have PBO for my processor. I was looking around and found the pbo2 tuner program, which has worked for a lot of people. The problem is that lately, Windows Defender is flagging the program's driver as malicious and won't let me take it out of quarantine, even after excluding the folder, etc. I hope someone can help me out with this because I've tried everything, and the program runs, but it doesn't change the voltages.

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Reddit
reddit.com › r/pcmasterrace › where can i download pbo2 tuner?
r/pcmasterrace on Reddit: Where can I download PBO2 Tuner?
December 8, 2024 - Question: How many OTA users here have network tuners? And do you ever want to watch multiple channels simultaneously? ... I found that I can access PBO settings two different ways, and when I try to make changes while accessing PBO settings one way, the changes aren't reflected when I save and exit (although they seem to be saved regardless??) ... PBO2 Tuner Startup.
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Reddit
reddit.com › r/overclocking › where to get pbo2 tuner for amd cpus? (latest drive link is dead)
r/overclocking on Reddit: Where to get PBO2 Tuner for AMD CPUs? (latest Drive link is dead)
July 11, 2022 -

Hey yall. Quick question: where can I get this famous PBO2 Tuner? I've found a link on overclock.net, but the link is dead (drive says it's in the owner's bin). That post was from April. I've found anoher version from January, but I really want to use the latest build for my 5800X3D. Thanks!

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GitHub
github.com › zoicware › PBOTuner2
GitHub - zoicware/PBOTuner2: Automate your PBO undervolt · GitHub
If you do not already have PBO2tuner you can choose to install it with the script
Starred by 39 users
Forked by 4 users
Languages   PowerShell
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Reddit
reddit.com › r/overclocking › where can i get pbo2tuner?
r/overclocking on Reddit: Where can I get PBO2Tuner?
July 16, 2022 -

Pretty much the title. I went to the GitHub page to try to download but after following the link, it says that the user no longer has it in the drive. Found another link that’s also takes me to the drive but when I try to download it, it just downloads as a internet explorer file and doesn’t open anything (not even sure if that was safe or not but i got it from overclock forum)

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Reddit
reddit.com › r/hpomen › pbo2 tuning tool
r/HPOmen on Reddit: PBO2 tuning tool
November 12, 2022 -

While browsing r/overclocking yesterday, I came across a pretty useful program for undervolting an AMD system on a restrictive BIOS. More specifically, this program allows for negative core offsets to be applied on startup via Task Scheduler in Windows. No need to do it manually or activate a profile in Ryzen Master on every startup or reboot.

I hadn't seen it mentioned on here yet, so I figured it could be helpful to my fellow Omen users.

Here is the guide

This guide is made for a 5800X3D, but I think it should work fine on any other Zen3 chips. I have a 5800X and it's woring as intended.

I will say this, to make things easier, I didn't follow the guide exactly. Instead of setting the same negative offset for every core, and stress testing to check for stability, I simply ran the curve optimizer on the 'per core' setting with Ryzen Master. It takes a little over an hour for Ryzen Master to run the per core optimizer, but when it's finished it gives you the specific offset values for each core, and you can just copy those directly into the PBO2 tuning tool.

From that point just apply the settings and follow the guide to set things up in Task Scheduler. I didn't bother with the final step either. If you wanna double check that the settings are applying on startup, you can always just fire up Ryzen Master and check from there.

I have a 45L, which does a really good job with cooling at stock, so the results on my end were pretty marginal. Knocked about 4C off my CPU temps, but I was already maxing out in the low 70's with some of the more intensive games.

If you're in one of the smaller rigs, this may be even more beneficial, as the further you can get way from the really high temps, the better the cpu can perform overall.

Find elsewhere
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Reddit
reddit.com › r/amdhelp › pbo2 tuner was blocked by windows defender (again) after i allowed an exception for it to run a couple of weeks ago when it first started getting flagged as a threat. what can i do now?
r/AMDHelp on Reddit: PBO2 Tuner was blocked by Windows Defender (again) after I allowed an exception for it to run a couple of weeks ago when it first started getting flagged as a Threat. What can I do now?
September 13, 2025 -

I have an AMD Ryzen 5800X3D CPU plugged into an ASUS X470 Prime-Pro motherboard, and the BIOS will not allow me to set curve optimizer to -30 on all cores, which is what I've been using forever on PBO2 Tuner, until Windows Defender recently decided that I shouldn't be using that program anymore.

When it was first flagged a couple of weeks ago, I simply added an exception and was on my way, albeit taking the risk of something bad happening, but a risk I was willing to take as I can't play many games without my CPU overheating if I don't have PBO2 Tuner running.

Yesterday, Windows Defender again decided to disable PBO2 Tuner and quarantine what it doesn't like which means I am now screwed and cannot use PBO2 Tuner at all, and Windows Defender will no longer allow me to make an exception to run it.

Is there anything I can do? My BIOS won't allow me to make the same settings and I do not have a clue how Ryzen Master works as far as inputting the same curve settings that I've been using with the very user-friendly UI in PBO2 Tuner.

Can anyone help me with this? Either getting Windows Defender to cooperate and let me continue to risk it, or to use another app that can accomplish the same thing?

Thanks!

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Reddit
reddit.com › r/amd › undervolting a 5800x3d with pbo2 tuner results in higher voltage and temps?
r/Amd on Reddit: Undervolting a 5800X3D with PBO2 Tuner results in higher voltage and temps?
October 6, 2022 -

So, i have a problem.

I recently upgraded my old i7-5820K to a Ryzen 7 5800X3D. (Great CPU, the performance gains in some of my games are crazy, especially all the lows.)

My GTX 1080 is also undervolted, so i looked into undervolting the CPU too. Quickly i became aware of PBO2 Tuner and found the undervolting guide on Github.

I set PBO2 Tuner to -20 on all cores and noticed that my voltage, temps and power comsumption are higher than without PBO2. The same happens with -15 on all cores.

I did a quick benchmark to give you guys an overview. Here is the one without PBO2, stock settings: Screenshot

And here is the one with -15 on all cores, set with PBO2 Tuner: Screenshot

What am i doing wrong? I basically followed the Github-guide without the automation, watched some YouTube-videos from other users using the same method, but something is off for me.

I hope you guys can help me.

My full system, if that's important:

  • Ryzen 7 5800X3D

  • 32GB Corsair Vengeance LPX DDR4-3600 (CL18)

  • Asus ROG STRIX B550-E GAMING with the latest BIOS

  • Be Quiet! Dark Rock Pro 4

  • Be Quiet! Straight Power 11 (1200W)

/UPDATE:

Thanks for the help! Using the settings that DIMEBAGLoL provided, everything works now. Have to test -30 on all cores a little bit more, but i'm now boosting to 4.4Ghz at 70°C, have test some games and look how they do.

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Reddit
reddit.com › r/amd › pbo tuner vanguard
r/Amd on Reddit: PBO Tuner Vanguard
February 11, 2023 -

Ive been using PBO2 Tuner for a little and found my sweet spot for a curve. However every time I open PBO2 Tuner Riot Vanguard gives a warning that something was blocked.

What’s being blocked is inpout.x64.sys.

So, to solve this issue I delete inpout.x64.sys and restart my pc and vanguard doesn’t give me a warning message anymore, otherwise even if my CPU is NOT being undervolted and PBO2 Tuner was not open after a restart, I still get the warning that inpout was blocked.

is there any way i can fix this so i can still undervolt my cpu while still being able to use riot vanguard and not put my riot accounts at potential risk?

my cpu is a 5800x3d so you can imagine i’m in a tough spot. Temps without undervolt: ~55-65 Idle, ~65-85 gaming.

EDIT: So, funny enough I took at look at the Gigabyte page for my motherboard and saw a new bios version released in January but oddly enough it didn’t show up until today or the past 2 days because I’ve been checking continuously for a while now. Anyways, cleared cmos and updated bios and now my CPU temps have dropped a substantial amount to the point where PBO2 tuner isn’t needed as much as it did. I’m still taking a look into vanguard and contacted riot (will edit when they respond) about the PBO2 warning.

Current temps (still without undervolt): ~39-44c idle, ~55-70c gaming.

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Reddit
reddit.com › r/amd › pbo2 tuner startup. how would i know it's even running?
r/Amd on Reddit: PBO2 Tuner Startup. How would I know it's even running?
October 29, 2022 -

Hey guys, I set up PBO2 Tuner for the 5800x3d for startup via task scheduler, but I was wondering how would I know if it's running properly with all the settings?

It says it's running, but would the values be set when I open the Tuner? Because they're blank right now.

Or do I just have to monitor the temps and voltages to see if they are consistent with the Tuner like when set up manually?

*edited for spelling

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Reddit
reddit.com › r › overclocking › comments › vwkcka › where_to_get_pbo2_tuner_for_amd_cpus_latest_drive
Onde encontrar o PBO2 Tuner para CPUs AMD? (o link do ...
July 11, 2022 - E aí, pessoal. Uma pergunta rápida: onde posso encontrar esse famoso PBO2 Tuner? Encontrei um link no overclock.net, mas o link está morto (o Drive diz que está na lixeira do proprietário). Essa postagem era de abril. Encontrei outra versão de janeiro, mas realmente quero usar a versão ...
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Reddit
reddit.com › r/amdhelp › can someone explain how to set pbo2 tuner to start up when i start my pc
r/AMDHelp on Reddit: Can someone explain how to set pBO2 tuner to start up when i start my pc
May 16, 2022 -

I want PBO2 Tuner to load and automatically set -30 to all cores to my 5800x3d

In this thread they explain how to do it but it dont understand.

https://www.overclock.net/threads/corecycler-tool-for-testing-curve-optimizer-settings.1777398/page-39#post-28979914

Top answer
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i don't know if anyone is still sruggling but there's a way simplier solution. just create a batch file with the text: start "whatever" "C:\ your directory \PBO2 tuner.exe" -30 -30 -30 -30 -30 -30 -30 -30 and put it in your startup folder: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup - for all users. ProgramData folder is hidden tho alt+R - shell:startup - for current user
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Please let me complain about my waste of efforts and share tips with anyone who are in trouble to automate the PBO2 tuner with task scheduler. Today, I had tried to automate PBO2 tuner with task scheduler according to some guides shared with many kindly guy including this forum's. Fortunately enough, soon I managed to automated it PARTIALLY; I mean that the values of PPT/TDC/EDC showed proper as I had set in task scheduler when I launched PBO2 tuner just after the OS was booted. On the other hand, the values of CO unfortunately remained DEFAULT numbers. Then, I carelessly and completely MISUNDERSTOOD that the automation was failed or incompleted. As a conclusion, I had already succeeded in the automation from the very first.Although the CO values showed default on PBO2 tuner, the values I set in task scheduler IN FACT reflected properly in terms of internal processing. I was aware of the possibility when I realized that the values of CO on PBO2 tuner showed default numbers everywhen I reboot it even if I input the proper values manually. Soon, I tested with Cinebench R23 and it is immediately verified that the hypothesis is CORRECT. I completely wasted 3 or 4 hours of my life for what I never need to do, as a result. So, all I want to tell here is careless assumption is really dangerous. I STRONGLY recommend anyone who are in trouble of setting CO values to PBO2 tuner with task scheduler to test occasionally with some benchmark and monitoring software even if it seemed failed to it. I hope my labor in vain makes help someone, someday;)
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Akif
akif.kr › blog › 5800x3d-pbo2-tuner-undervolt
5800X3D Undervolt: My Experience with PBO2 Tuner and Undervolting
September 5, 2025 - You can download PBO2 Tuner from here. Simply unzip the archive into a folder and run the .exe. Please not that Windows Defender may flag it as a potential security risk, so run at your own risk.
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Microsoft Community Hub
techcommunity.microsoft.com › microsoft community hub › communities › products › windows › windows 11
Windows Defender is blocking true performance of my AMD Ryzen 5950x unacceptable. | Microsoft Community Hub
December 12, 2025 - I was using PBO Tuner to fine tune my processor yesterday and now Windows Defender blocked it for no reason and its not letting me restore the file.If...
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Reddit
reddit.com › r/amd › pbo2 tuner says its applied, but, doesnt seem make a difference (5800x3d)
r/Amd on Reddit: PBO2 Tuner says its applied, but, doesnt seem make a difference (5800x3d)
March 15, 2023 -

So, i have the following setup:

  • 4080 XLR8 Verto

  • 5800x3d (cooled by a Scythe Fuma 2, 1st version)

  • ASUS TUF B550m (using latest BIOS)

  • 2x 16gb Kingston Fury 3200mhz CL16

  • Windows on a NVME

  • 2x SSDs for gaming

  • XPG Core Reactor 850w

I´ve followed Fr33thy guide to use PBO2 Tuner, and while the software its saying my -30 is applied, it doesnt seem to be actually working..

  1. Clocks only going to 4350 while Running C23

  2. if im on -20 or -30 on all cores, my temps always go to 84º and it stays theres during the 10min multi-core...

is there anything im missing? maybe something in my bios is preventing? i just want lower temps, nothing else!