AMD to Introduce Adaptive Undervolting to Precision Boost Overdrive for Ryzen 5000

[kostacurtas]

AMD to Introduce Adaptive Undervolting to Precision Boost Overdrive for Ryzen 5000

AMD has announced they will be introducing Adaptive Undervolting tools for their precision Boost Overdrive software, available for the latest Ryzen 5000 series CPUs. This feature will be made available come launch of AGESA 1180 on 400-series and 500-series motherboards (estimated availability in...

www.techpowerup.com

AMD has announced they will be introducing Adaptive Undervolting tools for their precision Boost Overdrive software, available for the latest Ryzen 5000 series CPUs. This feature will be made available come launch of AGESA 1180 on 400-series and 500-series motherboards (estimated availability in early December), and will require a BIOS update to enable at the software level. According to AMD, this tool will dynamically calculate the precise amount of voltage required for a given task, analyzing internal sensors (such as workload, temperature, socket limits) and adapting voltage values on the fly at up to 1000 times a second.

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AMD says that enabling this feature could lead to up to 2% higher single-thread performance and up to 10% higher multithread performance, as lower temperatures enable the CPU to more aggressively Boost under these conditions. According to AMD, this undervolting technique shows higher gains the higher number of CCDs (and thusly, of cores) that a given CPU has available in silicon.

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[Cross-Section]

Good shit. Here's hoping this eventually rolls out on the GPU side of things.

 

[jediyoshi]

"Adaptive Undervolting tools for their precision Boost Overdrive software" is a hell of a word salad.

 

[TitanicFall]

Why not do this for Ryzen 3000 chips as well?

 

[asmith906]

Me looking at my Ryzen 3600 with disgust

 

[pksu]

I wonder if this is going to be the new default. If not, what are the downsides? In general I'm not a huge fan of automatic features having disclaimers about system stability, hopefully this is different.

 

[Ra]

"Adaptive Undervolting tools for their precision Boost Overdrive software" is a hell of a word salad.

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Almost said the exact same, but didn't want that to be the very first post of the thread haha.

Why not do this for Ryzen 3000 chips as well?

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Oh we both know why. Gotta drive those new hardware sales.

 

[WhovianGamer]

Is this what Cerny has worked on with AMD? Sounds like it to my novice ear but I could be wrong.

 

[rsfour]

I just do that shit manually on my 3600. Same with GPU.

 

[Miggytronz]

My 3700x is confused

 

[Deleted member 198]

Why not do this for Ryzen 3000 chips as well?

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Same reason SAM can be used on 3000 chips but won't because fuck us, that's why

 

[Cow Mengde]

"Adaptive Undervolting tools for their precision Boost Overdrive software" is a hell of a word salad.

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Ryzen Go Brrrrrrrrr mode.

 

[mordecaii83]

So just to clear this up, this doesn't require any special software to be running and just needs the PBO option turned on in BIOS correct?

 

[maximumzero]

None of this makes any sense to me, which is why I've just left everything on "Auto."

 

[denx]

Haven't really kept up, but how's availability for the Zen 3 chips? I know availability for the new GPUs has been a clusterfuck.

 

[Ra]

I don't understand any advantage this has over just finding the max stable undervolt yourself, then just leaving it there.

 

[smocaine]

Damn, still can't undervolt my 4800H laptop, then.

 

[mordecaii83]

I don't understand any advantage this has over just finding the max stable undervolt yourself, then just leaving it there.

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The "max" undervolt isn't necessarily the max in every situation, so this could theoretically have a higher undervolt in some workloads, while keeping the UV lower in others so you don't get any crashing.

 

[Darryl M R]

Is doing a BIOS update pretty simple with a completed build?

 

[Ra]

The "max" undervolt isn't necessarily the max in every situation, so this could theoretically have a higher undervolt in some workloads, while keeping the UV lower in others so you don't get any crashing.

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One typically tests the stability of the undvervolt with an extended test that runs the heaviest workload possible though, to avoid crashing in all scenarios.

 

[Astral Lovelace]

I don't understand any advantage this has over just finding the max stable undervolt yourself, then just leaving it there.

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1. You don't have to do it yourself
2. The 'max stable undervolt' will change from task to task, so it can go lower *when it can* than the 'max stable undervolt'.

 

[mordecaii83]

One typically tests the stability of the undvervolt with an extended test that runs the heaviest workload possible though, to avoid crashing in all scenarios.

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I know that, and that's my point. Some workloads can undervolt further than that stable setting, so you'd get a performance boost by having it be adaptive.

 

[Deleted member 79451]

I don't understand any advantage this has over just finding the max stable undervolt yourself, then just leaving it there.

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It's so all customers can benefit from the same performance curve as enthusiasts.

It's an interesting paradigm. My 3080 performs faster and cooler undervolted, even while running at lower clocks. I see the new AMD GPUs do, and with this article so do AMD CPUs... It's a brave new world. Slower is faster.

 

[Miniature Kaiju]

One typically tests the stability of the undvervolt with an extended test that runs the heaviest workload possible though, to avoid crashing in all scenarios.

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And that's the problem, the heaviest load possible will likely require higher voltages than a lighter load would, so by using that as your barometer for stability, you're leaving perf on the table.

It's actually what the PS5 does.