I realise the figures are very small and blurry, although I insert them full-size.
AMD Ryzen 5 9600X & Ryzen 7 9700X Linux Performance With 105 Watt cTDP
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Originally posted by zeb_ View PostI realise the figures are very small and blurry, although I insert them full-size.
I gave up and used a 3rd party image hosting service. There are some free ones people use, like imgur. I think Proton might also be an option ( https://proton.me/drive/photo-storage ). It's a hassle and I wish something Michael would do something to improve, at least for his subscribers.
Anyway, if you just want to tell me the 105W stats similar to how you did for PBO, that would be fine with me.
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Originally posted by zeb_ View Post- ...
- Tweaking memory timings has small impact. This is in addition to the "EXPO1" timings I used, for which my RAM is certified. They have several schemes and there is almost no impact betwen "Balanced" and the more aggressive "Tighter" and "Tightest" ones. This is in line with what I saw on other tests published around the web.
Originally posted by zeb_ View PostI could try to enable both PBO and TDP105W but since with PBO alone we reach the max temperature, I do not expect significant improvement due to the lack of headroom. A better cooler could maybe help.
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Originally posted by coder View PostYeah, the image hosting on this forums software will down-sample your images and I haven't been very successful in controlling that.
Originally posted by coder View PostAnyway, if you just want to tell me the 105W stats similar to how you did for PBO, that would be fine with me.Last edited by zeb_; 13 January 2025, 03:58 AM.
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Originally posted by coder View PostI wonder whether PBO is even respecting the power limit at all? You're probably right that, at least with your current setup, changing the limit to 105W probably won't have any effect on PBO performance.- Understanding Precision Boost Overdrive in Three E... - AMD Community (PBO)
- AMD Ryzen™ Technology: Precision Boost 2 Performance Enhancement (PB2)
However this warning is not repeated for PB2 for Ryzen CPUs. And by the way, they now call it PB2, and not PBO2, removing the "Overclocking" word in the acronym! They have been very fuzzy, describing PB2 as a safe enhancement "Precision Boost 2 is a performance-maximizing technology available in all AMD Ryzen™ and Ryzen™ Threadripper™ 2000 Series processors (or newer). This technology can improve your PC’s performance by raising clockspeeds, which makes the processor—and your applications—run faster. Best of all, Precision Boost 2 is entirely automatic: AMD’s intelligent processors have a sophisticated set of sensors designed to analyze conditions inside your PC and make the “go faster” decision as often as possible.". This suggests, without plainly stating it, that PB2 is still within safe limits defined by the CPU own sensors, but maintaining some ambiguity.
EDIT: It seems that PB2 and PBO are two different things after all... PB2 is automatically enabled on Ryzen CPUs that support it, and is obviously under warranty. PBO on the other hand is still noted as voiding warranty. This is so confusing!
In addition, AMD's blog announcement of TDP105W support specifically states: "With the new 1.2.0.2 BIOS update, you can run your AMD Ryzen 9600X and 9700X processors at 105W TDP without voiding your warranty for doing so." For this enhancement they leave absolutely no ambiguity.Last edited by zeb_; 13 January 2025, 06:25 AM.
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To finish, AMD's blog on PB2 states: "When the processor has headroom in these categories, and the active workload requires additional performance, Precision Boost 2 will automatically raise frequencies until one or more of the above limits is reached. When/if the limit is reached, processor frequencies will automatically level off to a steady-state condition for ongoing performance enhancement. Throughout this process, the processor can monitor conditions and adjust frequencies up to 1000 times per second. As a result, achieving maximum boost frequency and the sustained boost conditions observed by you will depend on the application and workload. It is a good guideline to know that light workloads experience the highest boost frequencies, while heavier multi-core and/or sustained workloads are more likely to encounter a limit and receive less boost."
This may suggest that there are differences in real-life performance between TDP105W and PB2, but this has still to be shown in practice or in the tests. So if you want a boost, plainly warrantied, and that you are not concerned by the electricity cost, then it is probably the better choice. And again it is the 9700X that benefits the most.
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Originally posted by zeb_ View PostThis may suggest that there are differences in real-life performance between TDP105W and PB2, but this has still to be shown in practice or in the tests. So if you want a boost, plainly warrantied, and that you are not concerned by the electricity cost, then it is probably the better choice. And again it is the 9700X that benefits the most.
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