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Reddit
reddit.com › r/amd › 7800x3d pbo / curve optimizer results
r/Amd on Reddit: 7800X3D PBO / Curve Optimizer Results
August 9, 2023 - All cores -30 in cpu optimizer. Expo acitated. In cinebench23 , hwinfo open and ryzen master all cores runs at 4905. Scores never get up to 17800. Only if I change priority of cinebench in. Task manager . Why ? PC Build Questions, Purchase Advice and Technical Support Megathread — Q1 2026 Edition ... Got my 7800x3D to 19436 in cinebench by using curve optimizer negative offset.
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Reddit
reddit.com › r/amdhelp › is -30 curve optimizer stable normal on 7800x3d? and other questions...
r/AMDHelp on Reddit: Is -30 curve optimizer stable normal on 7800X3D? And other questions...
April 29, 2024 -

Asking because it seems while browsing that most of them can't achieve anywhere near that and I want to make sure I'm not just hallucinating stability as it's my first Ryzen system ( last AMD system was an Athlon that served me well ).

Here's how it went. I first updated the bios to the latest version from MSI. Then installed Ryzen Master and Cinebench R23 as well as several other stress tests like Prime 95, AIDA, etc. I have the CL30 6000 ram on EXPO settings ( VDDIO lowered to 1.3 manually, EXPO had set it to 1.4 :/ ), also set memory context restore to enabled for the absurdly faster boot times.

Went in -5 steps on the curve optimizer, ran the included Ryzen Master "stress test" for stability, then ran a Cinebench with all apps I could stop stopped in windows for ideal replicability of results ( cinebench results can fluctuate quite a bit even doing this ), anti virus off and everything I could think of.

Noted the results and kept going on with more -5 steps. Turns out that -30 is where if I go any further, I start getting consistent performance degradation. -25 will get worse results, same for -28, -35 and -32.

After that I ran a suite of Prime 95, AIDA, IBT and as many other stability stress tests I could. Then ran a few games ( Helldivers 2, Rimworld, Baldur's Gate 3 and a few others ), browsed, used handbrake and encoded a few videos with AV1, H265 and H264. Watched a few videos on youtube and MPC-HC and finally let it sit idle overnight with only HWinfo64 pinging the processor every 5000 milliseconds for info.

It's only been 24 hours and not a single crash yet. crosses fingers

Is there anything else I should look out for as far as voltages, settings, stability testing goes?

Any particularly finicky apps/games that are more prone to detect instability?

All counsel and tips would be greatly appreciated!




EDIT:

Thanks for the all the feedback. I'll put it to good use! :)

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Reddit
reddit.com › r/amd › 7800x3d curve optimizer best core lowest negative offset
r/Amd on Reddit: 7800x3d Curve Optimizer best core lowest negative offset
April 19, 2023 -

Hi guys,

I bought a 7800x3d, and so far I really enjoy it. I'm trying to set PBO + curve optimizer and coming from a 5900x and reading a lot of guides, it looks like best cores should not be able to have lower negative offset than the other ones. But so far my settings are:

core 0 -30

core 1* -35

core 2 -30

core 3** -30

core 4 -30

core 5-30

core 6 -20

core 7 -30

According to Ryzen Master, my best core is core 1* and second best is core 3**.

I rigorously tested these settings with OCCT, prime95 overnight and corecycler, an I had no errors.

So my question is, is it normal that my best core can handle such a low negative offset, lower than the "regular" cores? Also, for core 6, I couldn't get lower than 20, as it gave me errors. That is weird because according to OCCT, it should be the worst core out of them.

Thank you for your answers!

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Overclockers UK
forums.overclockers.co.uk › hardware › cpus
Tuning 7800x3D for optimal performance | Overclockers UK Forums
April 18, 2024 - the only thing you need to do is set curve optimiser the negative all core and start at -20 Set EXPO, and cheek the SOC voltage is running below 1.3 if not lower it. ... I've recently got a 7800X3D with a MSI x670E Tomahawk with 32Gb Corsair 6000 CL30. EXPO all running (finally) and stock all ...
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SkatterBencher
skatterbencher.com › home › skatterbencher #60: amd ryzen 7 7800x3d overclocked to 5400 mhz
SkatterBencher #60: AMD Ryzen 7 7800X3D Overclocked to 5400 MHz - SkatterBencher
April 5, 2023 - I’m basically limited to EXPO + PBO negative curve optimizer. Is there any way to squeeze more performance out of the chip? I noticed that after the latest bios update, which limits 1.3v, the chip is performing worse. What are my options? ... Unfortunately, without Eclk there’s just EXPO and PBO for squeezing more performance. ... Regarding method #4 (ECLK), I think you could also use the “auto offset” tool in the Ryzen Master application’s Curve Optimizer.
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H|ard|Forum
hardforum.com › [h]ard|ware › amd processors
7800X3D best BIOS settings | [H]ard|Forum
July 31, 2023 - PBO advanced you can use a negative curve optimizer offset to reduce voltage on a curve.
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Hardware Busters
hwbusters.com › home › cpu › amd ryzen 7 7800x3d cpu review: performance, thermals & power analysis › page 11
AMD Ryzen 7 7800X3D CPU Review: Performance, Thermals & Power Analysis - Page 11 of 13 - Hardware Busters
April 5, 2023 - To access this feature, you must first enable the Precision Boost Overdrive (PBO) through the BIOS or Ryzen Master. For those unaware of what the curve optimizer does, it allows you to set the operating voltage of each core independently.
Find elsewhere
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Reddit
reddit.com › r/overclocking › 7800x3d curve optimizer question(s)
r/overclocking on Reddit: 7800X3D Curve Optimizer Question(s)
January 5, 2024 -

PC components: 7800x3d, 7900xtx, 32gb ram corsair vengeance 6000mhz cl30, Gigabyte b650 aorus elite ax rev 1.2.

I built my first pc couple of weeks ago and I limit vsoc to 1.2njust for precaution and saw many posts about the PBO and curve optimizer so I set it to -20.

I know CO allows my cpu to run beyond its limit for better performance, but what exactly does it do?

  • Does it affect performance in gaming?

  • Does it lower temps or increase them?

  • Does it affect the cpu lifespan?

  • Difference between negative and positive offsets

  • And most importantly do I really need it?

Thanks a lot and sorry for asking too many questions!

Top answer
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This is the most comprehensive guide on Curve Optimizer I've seen: https://skatterbencher.com/amd-precision-boost-overdrive-2/ To grossly oversimplify, it is like an adaptive voltage offset that scales with the power requested. Positive CO is an overvolt, and negative CO is an undervolt. Negative will decrease temperatures and positive will increase them. In terms of how it affects performance, several factors go into how the boost algorithm for the CPU works, and two of those is the power limit and thermal limit. Both of these are lower for the X3D chips because the 3D vcache is more sensitive to heat and more power = more heat. A lower voltage directly translates to less power consumption, and therefor lower temperatures, which means higher boots clocks. Anything that will allow higher boost clocks will benefit performance to some extent, but there is also a hard limit on the clock speed for X3D cores that is implemented by a maximum allowed multiplier - 50.5 for the 7800X3D for a max boost of 5,050GHz. Whether you ever see that speed will depend on how many cores are in use by your OS, as the maximum boost goes down as the number of cores in use goes up and that "top speed" should only occur if one or two cores are active. (Fun trick - you can go over that limit by increasing the bus clock on the motherboard, but that can screw with other components, so it's best to avoid it unless you board has an asynchronous clock function for the CPU.) In terms of lifespan, negative curve optimizer is an undervolt, so it won't impact the lifespan of the CPU negatively. Positive CO can hypothetically negatively impact the lifespan of the CPU, but it's unlikely unless you crank it enough to significantly impact temperatures. Positive CO is also much less useful, as the only real reason to use it is to stabilize manual overclocks - not something you should (or can?) do on an X3D CPU or when using the fun trick I mentioned above. You don't need it, but it will help you system run faster and cooler, so if -20 runs stable and doesn't exhibit clock stretching (CTRL-F in the Skatterbencher link above), there's no reason not to use it.
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2
I'm not an expert by any means, but if I'm not bad, it lowers the default voltage assigned to each frequency, so the CPU can reach higher freqs (or the same one) when consuming and warming less. Too negative values on the curve can cause unstability issues, and a clear CMOS in the worst cases, but it's safe. On the other hand, this can be somehow compensated using Low Line Calibration.
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Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
New build Optimize 7800x3d / Curve optimizer - CPUs, Motherboards, and Memory - Linus Tech Tips
January 28, 2024 - Hello All, I just finished building my new rig which uses a 7800 x3d and wanted to optimize it prior to installing games. I keep seeing things about undervolting to improve temps and performance. Under 100% load my temps reach 78c. I have PBO turned on but no curve optimizer currently. Is the cur...
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Overclockers
overclockers.com › home › forums › hardware › cpus › amd cpus
7800X3D and Curve Optimizer | Overclockers Forums
December 31, 2023 - On the other hand, this CPU runs almost the same if there is a curve optimizer enabled or disabled. If you want to overclock it, then check higher blck and lower voltages at the same time to keep it below ~89°C. 5050MHz is about max for 7800X3D ...
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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?
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...
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TechPowerUp
techpowerup.com › review › amd-ryzen-7-7800x3d › 26.html
AMD Ryzen 7 7800X3D Review - The Best Gaming CPU - Overclocking, Boost & Clock Frequencies | TechPowerUp
AMD Ryzen 7 7800X3D
Set the various power limits to something like 200, you can raise them later if you max out one of them. Now the most important part, you must enable Curve Optimizer or you will not see any meaningful gains. Start with a value of -15 on all cores, boot into Windows, and use Ryzen Master to check ... AMD's Ryzen 7 7800X3D is everything that gamers want: eight fast cores, in a single CCD, with 3D VCache stacked on top at a price point of $450. In our review we can confirm that 7800X3D is indeed the fastest gaming CPU available, beating Intel's 13900K and even the 7950X3D.
Rating: 5 ​
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Overclock.net
overclock.net › home › forums › amd › amd cpus
new pc amd ryzen 7 7800x3d | Overclock.net
October 21, 2024 - Ryzen master is generally problematic in my experience and not worth even considering. For most Ryzen CPUs, the first stop is the PBO Curve Optimizer section in the UEFI, but the X3D chips are so limited in other ways that that usually doesn't do very much beyond lowering temps a little and hitting maximum boost slightly more often.
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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 - You can also manage the adjustments for the PBO and Curve Optimizer parameters either on-the-fly or through the BIOS to ensure that the changes remain effective across system restarts. ... You have the option to customize your views for both CPU and RAM. For the CPU, you can monitor individual CCDs, while for the RAM, you can focus specifically on EXPO™ parameters. ... The releases of AMD Ryzen Master extend native language support from English to include German, French, and Simplified Chinese.
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Overclock.net
overclock.net › home › forums › amd › amd cpus
[Official] Zen 4 X3D Owner's Club (7800x3D / 7900x3D / 7950x3D) | Page 269 | Overclock.net
January 8, 2023 - *Base clock of 7800x3D still unknown Detailed Product Pages: 7950X3D: https://www.amd.com/en/products/apu/amd-ryzen-9-7950x3d 7900X3D: https://www.amd.com/en/products/apu/amd-ryzen-9-7900x3d 7800X3D: https://www.amd.com/en/products/apu/amd-ryzen-7-7800x3d Confirmed TJ Max: 89c (vs 95c on non v-cache Zen 4) Overclocking Supported: ... Curve Optimizer Voltage Offsets Post Keynote Interview with more info regarding 2 CCD design and overclocking:
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Reddit
reddit.com › r/overclocking › optimizing 7800x3d
r/overclocking on Reddit: Optimizing 7800x3d
October 27, 2024 -

What are some tips/trips to optimize or overclock the 7800x3d ?

https://pcpartpicker.com/list/QsQGBL

My parts list above.

I went with some parts like the motherboard , and cooler that should allow for over clocking . But I'm not really sure how to do it, this is my first build

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Reddit
reddit.com › r/overclocking › 7800x3d > curve optimizer doesn't seem to do anything?
r/overclocking on Reddit: 7800X3D > Curve optimizer doesn't seem to do anything?
March 24, 2025 -

Hi all,

My 7800X3D is currently scoring slightly below 14k on TimeSpy, ~18,300 on Cinebench R23. Decent scores, but was hoping to squeeze out a bit more with some UV / OC magic.

In my BIOS I YOLOed the curve optimizer all the way to -50; figured I'd let it crash and work my way up from there.

But nothing changed. No difference in thermals, no instabilities, benchmarks all the same. I opened Ryzen master to try and load the BIOS settings and it keeps telling me that CO is turned off even though it's very clearly set to 'all core -50' in BIOS.

Am on latest chipset drivers as well as bios.

What gives? Anybody have any thoughts? What's a good way to verify my CO settings?

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Tom's Hardware
tomshardware.com › pc components › cpus
AMD Ryzen 7 7800X3D: Power Consumption, Efficiency, Test Setup, and Overclocking - AMD Ryzen 7 7800X3D Review: New Gaming Champ Beats Pricier CPUs - Page 2 | Tom's Hardware
AMD Ryzen 7 7800X3D Review: New Gaming Champ Beats Pricier CPUs
For example, AMD has added support ... can enable with a single click. You can also now undervolt the X3D chips using the Curve Optimizer that can be accessed either via the BIOS or Ryzen Master, with the latter also having a built-in auto-tuning feature that takes an hour to derive ... Sub-$450 CPU is even faster for gaming than Ryzen 9 7950X3D.
Rating: 4.5 ​
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Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
7800X3D curve optimizer per core - CPUs, Motherboards, and Memory - Linus Tech Tips
September 17, 2024 - i stress tested every core, one by one, and found the sweet spot for every core. but when i run an all core stress test, it crashes instantly. i don't understand why.