Power Supply Quality

As part of our testing, we also check output parameters are within specifications, as well as voltage ripple and line noise.

Main Output
Load (Watts) 203.21 W 507.02 W 757.83 W 1009.06 W
Load (Percent) 20.32% 50.7% 75.78% 100.91%
  Amperes Volts Amperes Volts Amperes Volts Amperes Volts
3.3 V 2.27 3.45 5.66 3.45 8.5 3.4 11.33 3.37
5 V 2.27 5.18 5.66 5.16 8.5 5.09 11.33 5.06
12 V 15.1 12.16 37.75 12.14 56.62 12.11 75.5 12.1


Line Regulation
(20% to 100% load)
Voltage Ripple (mV)
20% Load 50% Load 75% Load 100% Load CL1
3.3V + 5V
3.3V 2.4% 12 18 18 18 16 24
5V 2.2% 16 18 20 22 18 26
12V 0.5% 16 24 28 32 30 24

The electrical performance of the GIGABYTE UD1000GM PG5 is admittedly better than we initially surmised. There is strong filtering on the primary voltage output, with the GIGABYTE UD1000GM PG5 displaying a maximum ripple of 32 mV on the 12V line under maximum load, which is around 25% of the recommended design limit. The voltage regulation of the 12V line is equally impressive, at less than 0.5%. GIGABYTE’s engineers neglected the 3.3V and 5V lines a little, as the regulation is at about 2.2% and the voltage ripple goes up to 45% of the design limit. These power quality figures are very good for a product of this tier.


The announcement of Intel’s new ATX v3.0 specifications was bound to start a race, as every company is looking to establish itself among the early adopters as a means of growing with the larger market. GIGABYTE took a little different approach here – instead of developing a whole new platform capable of fulfilling all of ATX v3.0 requirements, they simply upgraded one of their existing units and added one 600 Watt 12VHPWR connector to it.

It is the first time we have ever seen a platform from Xiamen Metrotec, the OEM of this unit. The OEM obviously needs to be following the design and guidance of the final developer, which is GIGABYTE in this case. Nevertheless, it appears that they are doing a very good job with their core topology designs and assembly process, both of which we found to be very clean. However, the quality of the components used by GIGABYTE for the production of the UD1000GM PG5 is wanting. The PSU comes with a very long warranty but most of the components, passive and active alike, are of middling quality. Taking into account the high internal temperatures that the UD1000GM PG5 reaches under stress, we feel that GIGABYTE’s engineers are being a little too confident.

When it comes to performance, the GIGABYTE UD1000GM PG5 will not be entering the hall of fame. However, all things considered, it is fairly well-balanced. The power quality of the unit is very good, with excellent regulation and filtering on the primary voltage line and adequate figures on the secondary lines. It is adequately efficient so as to achieve an 80Plus Gold certification with an input voltage of 115 VAC, yet only barely, so there is room for improvement. The only real disadvantage of the UD1000GM PG5 is its small size, which forced the engineers to use a smaller 120 mm fan, making the unit run both hotter and louder than most equally powerful units. This only becomes a true issue while the unit is heavily loaded though, and should not be bothering typical users while they simply want to do their work or browse. The performance of the GIGABYTE UD1000GM PG5 is unimpressive by today’s standards but, taking into account the retail price of the unit, it is good overall.

The true advantage that GIGABYTE’s UD1000GM PG5 currently has is simple – no competition. It is virtually the only unit with a 12VHPWR connector currently available. If someone needs to purchase a powerful PSU right now and expects to be upgrading their graphics card in the near future and/or often, the UD1000GM PG5 is  essentially the only choice with respect to forward-compatibility. That being said, one has to remember that this unit does not fully fulfill the ATX v3.0 requirements - it is unlikely but not unfathomable that the UD1000GM PG5 may not be able to handle future graphics card releases that could produce excessive transient loads.

Regardless, the current retail price of $160 is reasonable for an 80Plus Gold certified unit with that kind of output, so buyers are not paying a severe premium for the new 12VHPWR connector. However, if you are not in a rush to purchase a PSU right now, we err on the side of caution, and recommend waiting for actual ATX v3.0 compliant units to pop into the market.

Hot Test Results (~45°C Ambient)
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  • StevoLincolnite - Thursday, June 23, 2022 - link

    Yeah, not much comment from Anandtech, they used to be the leaders in this field... But it seems more convenient and easier to just get information from a select few Youtube channels than this site now.
  • DigitalFreak - Friday, June 24, 2022 - link

    AT hasn't done this in years. The last thing I remember them doing like that was exposing SSD vendors (OCZ?) for switching to lower performing parts while not updating the model number.
    GN is the go-to site for this stuff now.
  • LordSojar - Saturday, June 25, 2022 - link

    You might enjoy this, then.

  • 29a - Thursday, June 23, 2022 - link

    How about not going so heavy on the acronyms. It really helps to write the whole thing out the first time you use it.
  • mode_13h - Thursday, June 23, 2022 - link

    You mean like APFC and MOSFET? I feel you, but then again even writing them out wouldn't help without a proper explanation, which could turn into quite a digression. At that point, people are really just better off looking up those terms themselves, so they can get the appropriate level of understanding they seek.
  • DanNeely - Friday, June 24, 2022 - link

    If written, such definitions should be put in a boilerplate "how we test" page that gets included with each article. Available for anyone new, but not a bother for the rest of us since we can just skip over it.
  • mode_13h - Friday, June 24, 2022 - link

    Yeah, I've seen Toms Hardware have explainer articles, which are then linked from the relevant reviews. That would be a way to provide background, without cluttering up the actual review.

    Because, at some point in time, everyone needed/needs to learn what PFC is and why it matters. Plus, it's a cheap way to get another article & more page views.
  • meacupla - Friday, June 24, 2022 - link

    If you don't know the acronym, you might as well look it up.
    If you've never heard of the acronym in the first place, there is a high chance that you wouldn't understand what it does, just from the string of words the acronym is made from.
    This applies to most electronic/computer acronyms.
  • Khanan - Thursday, June 23, 2022 - link

    Aside from the loud fan it seems to be good enough.
  • Techie2 - Thursday, June 23, 2022 - link

    I used a lot of Gigabyte Durable mobos over the years with excellent success. When they failed to upgrade their VRM design to handle AMD's 8-core CPUs and the VRM would overheat and throttle the CPU frequency/performance I notified Gigabyte constantly for almost a year. They proceeded to tell me I was wrong even though reports started showing up in mobo forums all over the net confirming the problem with the heavy power required for the 8-core AMD CPUs. So I discontinued using Gigabyte mobos since I could not rely on them to be reliable and properly engineered for the application. Some two years later they finally upgraded the VRMs for the defective mobos but they never replaced or recalled the defective ones they sold.

    From this review it looks like this is another "price point" product as sold by any number of PSU purveyors instead of a true premium quality, long-life design that most folks building high end PC systems would desire. I'll pass on this and the many cookie cutter products dumped into the marketplace by companies looking to boost their profits by sticking their name on a mediocre product that they don't even produce. There is a lot of badge engineering for profit these days.

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