Power Consumption

On AMD’s official specifications for the Ryzen 9 6900HS, it lists the TDP as 35 W: the same specifications as the 6900HX, but at an optimized TDP. The HS means that it can only be used in AMD-approved and codesigned systems that can get the best out of the unit: i.e. it is an ultraportable premium device. That being said, laptop vendors can customize the actual final power limit as high as 80W, with the idea that because they are using an optimized voltage/frequency binned processor, the laptop design that can dissipate that much can extract more sustained performance from the processor, this usually translates into a higher all-core frequency.

For our ASUS Zephryus G14, the standard default power profile, known as ‘Performance’, is meant to conform to AMD’s Power Management Framework, i.e. scale from Energy Saving to Performance as required. In this mode, the system has a sustained 45 W power draw.

Performance: 45W

Loading up a render like POV-Ray, the system spikes the CPU package power to 83 W and 80ºC, before very quickly coming down to 45 W and a slowly rising temperature to equilibrium at 87ºC.

With something a bit more memory heavy, such as yCruncher, the same power profile is shown, this time with the power around about 81ºC for most of the test because it spends more time on memory access than raw throughput.

For a real-world scenario, Agisoft also spikes up very high initially, before reaching a plateau at 45 W and 90ºC.

Turbo: 65W

The other option on offer for this system is the ‘Turbo’ Mode, which jacks everything up to 65 W sustained.

This means we hit the peak temperature limits quite quickly, and the system ramps down over time to the 65 W average power.

The yCruncher profile is a bit more varied due to the CPU performance going further while the memory performance staying the same, but we still see temperatures in the mid 90s and power hovering more around 75 W.

Agisoft’s Turbo profile is all about being temperature limited in this case, and we still end up in the sustained parts of the test around that 65 W value.

If we were to look at how the power was distributed in each mode:

In performance mode, we see 16.0 watts when one core is loaded, going down to 5.2 watts per core when all cores are loaded and a frequency of 3775 MHz.

Compare that to the Turbo Mode:

The single-core data is the same, nothing changes there, but we’re now up to 7.2 watts per core when fully loaded, and a much higher frequency at 4050 MHz. But this means we’re using 17 watts more power (or 38% more power) for only 275 MHz (a 7% gain).

Looking at the frequencies in this format, you can see a slight difference in performance, but seemingly not that much to justify the power difference. Then again, I suspect Turbo is only really for when you are fully charged and plugged into mains power anyway.

For the following benchmarks, we’re going to be using both Performance and Turbo modes, but also I put the CPU in a 35W power mode. As the 1 core and 2 core loading is below this, it shouldn’t affect the single-core performance that much, but it might give us an understanding of where it compares to previous generations.

Core-to-Core, Cache Latency, Ramp Performance Per Watt
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  • mode_13h - Friday, March 18, 2022 - link

    > I haven't seen most of the anime you mentioned

    The Patlabor OAVs and movies are good for an 80's/90's nostalgia hit, IMO. It's that sort of old timey mecha anime that attracted many of us to the anime multiverse, in the first place. When I watched the OAVs on blu ray, the restoration was fantastic. Very crisp HD.

    > the new Dune was a big disappointment to me.

    Yeah, I read the trilogy before watching it. I'm so glad I did, because I knew exactly what was going on. Otherwise, I might've been lost.

    Yeah, they tried too hard to follow the narrative of the book. I think the only way to do it, and still end up with a good movie, is to focus on a particular story arc. If they'd nailed it, that would've set the stage for more to follow.

    I'd imagine they shot so much footage that it could conceivably be re-edited. I know they didn't shoot beyond the movie's ending, because I saw an interview with Zendaya, where she said she was only on location for the desert scenes for a couple days.
  • mode_13h - Friday, March 18, 2022 - link

    I mean the original Patlabor OAVs. There are about 7 of them, I think. Near movie-quality animation, for the time.

    BTW, some aspects of the Ghost in the Shell franchise definitely make more sense, as we move towards the future it predicted.

    Oh, and Planetes is a nice series about a crew working to collect orbital debris. It aired about 2 decades ago, but I think it was based on manga that was older, still. Some aspects of it were a bit anachronistic even for the time, but other aspects about space physics and orbital living clearly received a lot of thought and attention. The story arc is a lot more interesting than it sounds, with lots of commentary about life, love, the privatization of space, corporate politics, geopolitics, personal ambition, and the ultimate path and personal costs of space exploration. If you don't mind a bit of slapstick and are willing to look past some of the more anachronistic aspects, it's worth a watch.
  • GeoffreyA - Saturday, March 19, 2022 - link

    I haven't read the books but hope to do so before going into the coffin. Well, my view is that the excessive realism somehow harms the movie. If you go back to Lynch's 1984 version, despite the outlandish visuals, it is pretty alien, as Dune should be; and from a storytelling point of view, does that pretty well, going forward rapidly. Also, the princess's summary in the beginning got the viewer up to speed with this strange universe.

    The new movie took "show, don't tell" a bit too far, and the story didn't feel cohesive or unified, especially towards the end. It was tedious. The visions seemed forced and overdone. And for an epic, the cinematography was poor in my opinion. A key problem, I feel, is that it didn't bring out the true spirit of the desert. Coupled to this issue is Zimmer's music, in my view, missing the mark. It was too loud and vulgar, and seemed to view the desert from a commercialised, Hollywood lens, rather than feeling its power and reflecting that desolation. Then the CGI, I say no more.

    On the plus side, two sequences were outstanding: when Paul first steps onto the desert and picks up the sand/spice; and Paul and his mother's flight through the dust storm. That was world class.
  • GeoffreyA - Saturday, March 19, 2022 - link

    When I saw the Patlabor poster some time ago, I was intrigued. That was part two I believe. Yes, as time goes by, I prefer to look back at older anime. I think it's fair to say the industry has gone downhill these days.

    And thanks for that great description of Planetes. I won't mind giving one or two episodes a go and seeing what it's like. It reminds me that I've still got to watch Cowboy Bepop.
  • mode_13h - Sunday, March 20, 2022 - link

    Planetes is one of those series that takes a while to get going. The further you go, the deeper it gets. If you really don't like the first couple episodes, maybe it's not for you. However, you do get rewarded the longer you stick with it.
  • mode_13h - Monday, March 21, 2022 - link

    > I haven't read the books but hope to do so before going into the coffin.

    There's a lot you can read into it about the corrupting tendencies of empires and exploitation of peoples and their natural resources. It feels like it might've tapped into the decolonization zeitgeist, or at least what I presume it should've been, as the former colonial powers of Europe unwound their foreign holdings. I could do without so much of the psychedelic stuff, but I know Heinlein also went there. So, maybe that was just another trend in 1960's sci fi.

    > If you go back to Lynch's 1984 version

    It's funny this came up, because I just started watching it last weekend and finished it mere hours ago. It did seem a bit overwrought. I remember how he seemed rather too fascinated with the perversions and excesses of the Harkkonen. I thought the exposition was a bit too much for the naive movie-goer, but probably a helpful reminder for those who'd read the books years earlier.

    Since I came to it with low expectations, I really wasn't disappointed. Since the movie had many shots in low light, I wonder just how much I benefited from seeing a clean, HD presentation. Overall, I guess my main complaints would be that some of the acting seemed sub-par (Sting, for one, definitely should've stayed focused on the music business) and I just wouldn't have tried to cover so much plot. It felt busy and probably hard for people to follow, without having read it. I wasn't too bothered by the dated special effects, but they do kind of jump out at you. Some of the sets were quite impressive.

    > The new movie took "show, don't tell" a bit too far

    Probably a reaction to Lynch's version. I also wonder if his 1990 TV series, Twin Peaks, was also sort of a reaction to the criticism he got for too much exposition in Dune.

    Anyway, the last I'll say about it is that I'm finding the Wikipedia page on Dune to be a good resource on the author and his influences.
  • GeoffreyA - Monday, March 21, 2022 - link

    The visuals prevented me from watching it for a long time. It was only after I became a fan of David Lynch that I was able to see past that and appreciate what he had done. I think for a two-hour adaptation of such a vast novel, it is a commendable attempt, and I prefer it. As for the excesses, etc., well, that's Lynch as always. He always tends to bring out the darker side of things.

    I actually love Twin Peaks, and the recent season 3 was spectacular, if strange. But strange is this man's domain. Did too much exposition have an effect on his later work? I would say that Dune was an exception. Generally, his films are pretty obscure, nothing much being spelled out, and one often has to piece together a puzzle. He started off with that note in Eraserhead and hasn't really changed in four decades.
  • GeoffreyA - Monday, March 21, 2022 - link

    "Sting, for one, definitely should've stayed focused on the music business"

    The best line!
  • mode_13h - Tuesday, March 22, 2022 - link

    > I actually love Twin Peaks

    I never really watched it. My older sister watched the original TV airing. All I remember of it was the general strangeness and a recollection that even its conclusion left much unanswered.

    I haven't seen much of Lynch's work, but I did enjoy Mulholland Dr. All I remember from it is that I decided it's a fool's errand to make complete sense of the plot, since there were paradoxes inserted seemingly with the intent to break any strict interpretation.

    > Did too much exposition have an effect on his later work?

    That's not really what I meant. I was suggesting he got too much negative feedback on all the exposition in Dune, and therefore went too far in the other direction of being too obscure.

    From what I've heard, Kubrick would sometimes indulge in excessive obscurity to create a false sense of depth. The prime example being 2001: A Space Odyssey. If you actually read the book, you can supposedly see what kind of shenanigans he got up to, which I've heard he even admitted in an interview.

    > He started off with that note in Eraserhead and hasn't really changed in four decades.

    Ah, right. I never got round to watching that one.
  • GeoffreyA - Wednesday, March 23, 2022 - link

    Mulholland Drive is perhaps my favourite film of all films. Again, it's the tragic note that speaks to me, and Naomi Watts, brilliant. I've racked my head over this story a great deal, and my tentative answer is that even the latter part, Diane's tale, is a dream, various pieces of evidence pointing there, particularly the blue box and the smoke. The question is, whose dream is *that*! Perhaps it's the director's dream after all.

    I haven't read 2001, but you're right, the film keeps things pretty bare and mysterious, and that creates the feeling of a deep, even terrible, mystery. Our age could actually learn something from that and stop filling in all the details. The human mind does a far better job at piecing together the monster in the shadows.

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