Power Supply Quality

Main Output
Load (Watts) 130.73 W 326.52 W 488.27 W 650.81 W
Load (Percent) 20.11% 50.23% 75.12% 100.12%
  Amperes Volts Amperes Volts Amperes Volts Amperes Volts
3.3 V 1.78 3.31 4.45 3.3 6.67 3.28 8.89 3.27
5 V 1.78 5.09 4.45 5.06 6.67 5.03 8.89 5.01
12 V 9.6 12.06 24.01 12.05 36.01 12.02 48.02 12.02


Line Regulation
(20% to 100% load)
Voltage Ripple (mV)
20% Load 50% Load 75% Load 100% Load CL1
3.3V + 5V
3.3V 1.3% 12 14 14 14 12 14
5V 1.6% 12 16 16 16 12 16
12V 0.4% 16 20 22 26 26 18

The electrical performance of the Montech Century Gold 650W PSU was significantly better than what we expected to see from a product of this class. It has surprisingly strong voltage regulation on the primary 12V line, keeping it within 0.4% across the entire nominal load range. The regulation on the secondary 3.3V and 5V lines is at 1.5%, which is less impressive but still very good. The power quality of all three voltage lines is exceptional considering the tier of the PSU, with the 12V line displaying a maximum ripple of just 26mV with the unit operating at maximum capacity.

As part of our standard testing, we test the primary protections of all PSUs we review (Over Current, Over Voltage, Over Power, and Short Circuit). The Montech Century Gold 650W successfully passed all of the tests, generally reacting timely when needed and shutting down to protect itself and the components it is powering. Only the over-current protection on the 12V line is set too high, taking the PSU a good couple of seconds to shut down at even 110% of its rated amperage. Regardless, the protection operated successfully and no permanent damage is done to the unit even after several successive attempts.


Montech developed the Century Gold series for the higher end of the mainstream market, trying to combine and balance quality, performance, and cost. The market segment that the Century Gold 650W is targeted at is very large, and the sheer selection of available products makes it challenging for new products to establish reputations, even when attempted by highly established brand names. Regardless, Montech is definitely making a serious attempt with the Century Gold.

The core design of the Montech Century Gold 650W feels uninteresting by today’s standards, with the unit based on topologies that are widely used and proven over many years. What is interesting about the Century Gold is Montech’s selection of components, which are of outstanding quality considering the class and target audience of the PSU. Having a proven design combined with top-quality parts is the recipe for longevity. This extends beyond the passive parts, such as the all-Japanese capacitors, to the active parts of the PSU, which are remarkably efficient and largely unaffected by stress, despite the extremely plain heatsinks of the unit.

A good selection of components does more than just affect the quality of a PSU, as it directly affects every aspect of the unit’s performance. The Montech Century Gold 650W is a prime example of that quote, as the PSU displayed the combination of exceptional power quality, great energy conversion efficiency, and minimal losses. Only the thermal control circuit is simplistic and, still, the high efficiency of the PSU allows it to maintain very low noise levels over most of its nominal load range. For a product designed to target the mainstream market, the Montech Century Gold 650W PSU performs exceptionally well – better than a large number of top-tier PSUs.

Montech is a new company whose focus is to deliver, above all else, cost-effective products. As such, we expected the Century Gold 650W unit to be a power supply designed with a focus on price over quality. That, however, proved not to be the company’s main intention with this particular PSU series – instead, this is very much a premium power supply (or at least as much as a Gold PSU can be), with Montech incorporating some of the best parts and materials they could readily procure. So for their first showing on AnandTech, they've definitely made an impression by delivering a high quality PSU.

The one catch in all of this, however, is that the use of premium components adds to the price tag in what is historically a price-sensitive market. Selling the PSU directly through Newegg, Montech has priced the Century Gold 650W at $90, placing it dangerously close to the prices charged for premium PSUs from the larger, more established names. As a result, Montech can't lean on pricing to become a break-out star in this market, which means they have to work in smaller and harder ways instead.

Hot Test Results (~45°C Ambient)
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  • Threska - Tuesday, July 19, 2022 - link

    Well they could stand out by offering optional short cables in a carrying case so a person can mix and match with approved cables. That would stand out since most PSU companies don't. Also notice that that PSU would be good for cases that have a back vent instead of venting near the power switch.
  • DanNeely - Tuesday, July 19, 2022 - link

    IIRC a few OEMs sell shorter cables as optional accessories. I don't see a full second set ever being bundled with a PSU due to the increased cost and confusion/complaints from people who're upset they can't use both sets of GPU/peripheral cables at the same time. I suspect similar concerns about the increased support load from people who don't pay attention also stands in the way of a second package containing only short cables instead of long ones.

    Bigger specsheet numbers stand in the way of including peripheral cables with variable numbers of plugs on them despite the fact that the days needing all 3 plugs on a string of 3 is increasingly unlikely. (Even though a mix of 2 and 3 plug cables used to be common years ago when they were all hard wired.) Some sort of modular setup built around splitter cables with 1 short and 1 long branch on a Y cable seems possible, but I haven't seen anyone actually do it.
  • Leeea - Tuesday, July 19, 2022 - link

    It feels like every year or two there is a new PSU brand that shows up offering X, Y, Z, and it is gone in another two years.

    Makes a person a bit leery.
  • artifex - Friday, July 22, 2022 - link

    It helps that this author points out the OEMs involved in the actual manufacture of components.
  • 5j3rul3 - Tuesday, July 19, 2022 - link

    Is there any 850W version review?

    Montech Centry 850W ONLY sales 100USD in Taiwan, R.O.C.
  • Leeea - Tuesday, July 19, 2022 - link


    That would be a very good price for the quality of the components shown in this review.
  • edzieba - Tuesday, July 19, 2022 - link

    Sounds like they omitted 'premium' features (RGB, bundled bags, cable sleeving, extra cables, fancy case design, etc) in favour of spending that money on higher quality components. I can get behind that philosophy.
  • bill.rookard - Tuesday, July 19, 2022 - link

    Agreed. So can I as most people don't see the PSU anyhow. Omit the fancy stuff, stick with a solid design and specify high quality parts and you'll have a good psu. Heck, that applies to almost anything these days.
  • Threska - Tuesday, July 19, 2022 - link

    I don't see the bag as a premium feature for the simple reason people keep stuff like PSUs for a long time* and they don't always use everything (the benefit of a modular PSU).

    *Goes along with the ten year warranty.
  • Samus - Tuesday, July 19, 2022 - link

    When you mentioned the phrase "PC Power & Cooling" I had to pour one out for the GOAT.

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