Originally posted by blackshard
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Tiger Lake + Renoir On Ubuntu Linux For Battery vs. AC Performance
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Michael Larabel
https://www.michaellarabel.com/
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Whoah!
I just ran Geekbench5 on my Lenovo X13 with a Ryzen 4750U Pro and an Ubuntu 20.10.
Gives me
on battery: 825/4968
on AC: 1201/5665
Never thought that the impact would be that big - particularly with the single core performance where I assume the max frequency is seriously capped.
When comparing the figures to my Ryzen 3600 with a single core score of around 1300 or my 3700X (1350) this is really impressive.
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Originally posted by Michael View Post
There are some power consumption rate figures on battery on the last page, but diving more into the power figures between these two particular notebooks isn't too worthwhile when they are very different notebooks / classes of notebooks.
Of course they are very different spec laptops, but if we see that the Intel system is consuming 30 Watts and AMD system is consuming 20 Watts during battery workload, we can certainly say that there is nothing wrong with lower performance of the AMD system, because it is just doing what it supposed to do in battery mode: consume less.
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Wait, so Intel was right, the AMD chips are lowering performance of their GPU on battery, but look at those CPU benchmarks for Intel, they're lowering the performance of the CPU on battery! Oops. If I had to pick on which to nerf on battery, it certainly wouldn't be CPU performance--which everything relies on.
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Originally posted by Tuxee View PostWhoah!
I just ran Geekbench5 on my Lenovo X13 with a Ryzen 4750U Pro and an Ubuntu 20.10.
Gives me
on battery: 825/4968
on AC: 1201/5665
Never thought that the impact would be that big - particularly with the single core performance where I assume the max frequency is seriously capped.
When comparing the figures to my Ryzen 3600 with a single core score of around 1300 or my 3700X (1350) this is really impressive.
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I think the only valid conclusion is that it is complete hodgepodge. In practice, performance on battery doesn't really depend much on CPU manufacturer at all, but whatever the machine vendor implements in the firmware. And as usual, the firmware behaviour is badly documented or completely undocumented and the firmware itself is often buggy, too.
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Originally posted by r1348 View Post
Your 3700X can do better https://browser.geekbench.com/v5/cpu/3870037
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