Hot Test Results (~45°C Ambient)

Despite its lengthy warranty, the components of the UD1000GM PG5 left us unimpressed and our testing verified our initial assumptions. The PSU suffers when it has to operate inside a very hot environment, with the efficiency taking a brutal drop at high loads. The average efficiency reduction of 1% across the nominal load range does not seem that high but the efficiency drop is very high when the load is greater than 800 Watts, suggesting severe thermal stress.

Despite the very high ambient temperature, the fan of the GIGABYTE UD1000GM PG5 failed to start right away with the unit operating inside our hotbox. This resulted to worryingly high temperature readings at low loads. Once the fan started, the temperature dropped significantly, rising little by little as the load increased. The temperature does reach high figures again once the unit is heavily loaded but always stays within operating levels.

Even though it does not start right away, as expected, the 120 mm fan is giving its all to keep the GIGABYTE UD1000GM PG5 cool enough under these adverse operating conditions. The very moment is starts, the fan will be audible to the user, rapidly increasing in speed as the load increases. It reaches its maximum speed when the load is just a little higher than 50% of the unit’s capacity, valiantly trying to keep the PSU reliable and operational. The noise figures are above 50 dB(A), a figure that will annoy even the most tolerant of people if they are not wearing headphones – or ear protection.

Cold Test Results (~24°C Ambient) Power Supply Quality & Conclusion
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  • mode_13h - Monday, July 4, 2022 - link

    > renewable sources as substitute of traditional coal/gas/nuclear powerplants
    > are just a dream of people who don't undrstand physics.
    > We in Europe can see it for example in Germany.

    In much of Germany, you should be able to get about 200 kWh/m^2 per year from solar. My personal electricity usage is 235 - 370 kWh per month. So, that means I'd just need about 22 m^2 of solar panels to average net zero consumption. However, I still have gas for cooking and heating, so that would need to be factored as well.

    > You need to understand that not every country have sunshine like on Sahara,

    You import virtually all of your oil and gas. Why should renewable energy be so different? Whatever you can't generate in-country, you could import in the form of hydrogen or perhaps some chemical form that can reuse some of the existing oil and gas infrastructure.
  • andychow - Tuesday, June 28, 2022 - link

    H3 fusion, or any type of fusion, will never occur on earth. The high energy particles they release are just unstoppable and cause too much damage.
    Maybe we could do H3 fusion on the dark side of the moon, then send it back too earth by radio waves with a huge receptor that goes around the earth, but I seriously doubt that could happen this millennia.
  • niva - Wednesday, June 29, 2022 - link


    Firs of, when you type H3 are you talking about Tritium or Helium 3? What are these high energy particles you're talking about. You can look up fusion reactions and see that there are no exotic high energy particles that we cannot contain (like the type of particles you see in cosmic rays). This is true for all viable fusion reactions.

    We have done fusion reactions on Earth, and we're getting closer to doing them for less energy than what the actual reaction outputs. This has been the main challenge which has thusfar prevented fusion from taking off... meaning, right now, we usually have to feed more energy into fusion reactors to start and maintain fusion, than the reactors can output.

    Some entities have claimed success on those fronts recently too. Our main challenges going forward in terms of fusion is to better optimize the reactors, and to secure enough fuel.

    The idea of beaming energy back to Earth from space is a neat one, until you microwave the entire surface of the planet by "accident".
  • mode_13h - Monday, July 4, 2022 - link

    > The idea of beaming energy back to Earth from space is a neat one

    It's not a new idea. People have long talked about putting solar power stations in orbit and beaming down the power via microwaves. If you make the collector large enough, you can make it relatively safe for humans.

    > until you microwave the entire surface of the planet by "accident".

    Obviously, the larger the area, the lower the energy density. So, the concern wouldn't be "the entire surface", but rather cooking a city block... if one were dumb enough to use such a narrow beam.
  • mode_13h - Monday, July 4, 2022 - link

    > Our long term plan for the planet shouldn't really involve worrying about 600W GPUs.

    It's not just top-end gaming GPUs, but a general trend that seems to be happening with GPUs and CPUs.
  • mode_13h - Monday, July 4, 2022 - link

    > If GPUs ran on coal I'd be worried

    So much of worldwide power generation is indeed from coal or oil. Even gas isn't much better, depending on how much of it leaks during extraction and transportation.
  • RSAUser - Wednesday, June 29, 2022 - link

    I'm still wondering if California will step in and put a max allowed for a consumer GPU.
    Also interested if this argument will matter when more and more move to renewable where it won't really matter outside of peak power usage.
  • mode_13h - Monday, July 4, 2022 - link

    I feel like California's electricity prices are already high enough they don't need to.
  • Tunnah - Thursday, June 23, 2022 - link

    Gigabyte PSUs are radioactive. I can't imagine ANY enthusiast would risk buying them considering the debacle they went through. Truly a toxic product line. There's just too many great alternatives to take a risk. It's very much the case of "not even if it was free"
  • flyingpants265 - Thursday, June 23, 2022 - link

    It was the job of sites like Anandtech to do what GamersNexus did with exhaustive/destructive testing. GN also explained the phony PSU stickers, I think they've done such on other products as well, exposing plenty of shady industry practices and defective products.

    What we really need (and needed all along) was a chart, rating ALL products by advertised performance, their durability, and the warranty service. Like, a 3-year warranty doesn't help you if a card fails over and over again even outside the warranty period. And if my PSU fails, no way am I using a replacement of the same model that failed.

    As usual, some real thought & genuine effort put into anything would be nice...

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