Hot Test Results

In the following tables we can see that the 1STPlayer Steampunk 750W delivers relatively good power quality. The maximum voltage ripple on the 12V line is 30 mV, an unimpressive figure nowadays, but just 25% of the ATX design guide's recommended 120 mV limit. The regulation of the 12V line is exceptional as well, at 0.8% across the entire nominal load range. 1STPlayer paid less attention to the minor 3.3V/5V lines, the output quality of which is significantly worse. The ripple on the 3.3V/5V lines reaches 16mV/22mV respectively with a recommended maximum at 50 mV, and the regulation is at nearly 2.5% for both lines. These figures are definitely acceptable but not on par with the exceptional performance of the primary 12V line.

Main Output
Load (Watts) 151,84 W 378,67 W 564,9 W 752,23 W
Load (Percent) 20,25% 50,49% 75,32% 100,3%
  Amperes Volts Amperes Volts Amperes Volts Amperes Volts
3.3 V 1,37 3,39 3,44 3,37 5,16 3,32 6,87 3,31
5 V 1,37 5,18 3,44 5,16 5,16 5,1 6,87 5,06
12 V 11,55 12,13 28,87 12,1 43,31 12,04 57,75 12,03


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% 6 8 14 16 16 20
5V 2,4% 14 16 18 22 16 20
12V 0,8% 12 18 24 30 34 26

Operation in high ambient temperatures greatly affects the performance of the Steampunk Gold 750W PSU, especially at higher loads. The average nominal load range (20%-100%) efficiency drops by 1.2% regardless of the input voltage, going down to an average of 91.4% (230 VAC) / 89.9% (115 VAC). There is little change at lower loads but at loads greater than 80% the efficiency drops sharply, suggesting that the components of the PSU are getting stressed under these conditions. Thermal stress would be our first guess but the internal temperatures of the PSU actually are low, therefore we suspect that certain components are reaching their design limit.

As mentioned above, the internal temperatures of the 1STPlayer Steampunk 750W PSU are relatively low for a unit operating inside our hotbox. The thermal controller is aggressively increasing the speed of the fan under these operating conditions, trying to maintain as low as temperatures as possible, sacrificing silence in order to ensure reliability. With such a powerful fan, the cooling headroom is vast, but the noise levels become unbearable for typical users at loads higher than 200 Watts. The cooling fan’s speed seems to peak when the unit is at maximum load, where the sound pressure level nearly reaches 59 dB(A).

Cold Test Results Final Words & Conclusion
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  • PeterCollier - Tuesday, May 12, 2020 - link

    The high efficiency at low loads should help defray electricity costs with running Zen/Zen+/Zen 2 chips.
  • Operandi - Tuesday, May 12, 2020 - link

    And doubly effective when running 14nm Intel chips.
  • eek2121 - Tuesday, May 12, 2020 - link

    This PSU does not work with Intel chips. It does not provide enough power. 😉
  • PeterCollier - Tuesday, May 12, 2020 - link

    Ha! That's a good one.
  • Deicidium369 - Tuesday, May 12, 2020 - link

    Well Cheap Chinese parts tend to work best with other Cheap Chinese parts....
  • South_DL - Tuesday, May 12, 2020 - link

  • Spunjji - Tuesday, May 12, 2020 - link

    If you can't say something relevant, bash AMD! 😒
  • rocketman122 - Wednesday, May 13, 2020 - link

    Why the hell is it so hard to put the price in the first paragraph. Shet im getting tired of nonsense like this. I come here cause im tired of the younger crowd at but then nonsense like this males me go back. And the fact reviews are not often enough. Once every 5 days to a week. Problems getting sponsored products to review?
  • Ryan Smith - Wednesday, May 13, 2020 - link

    Due to a lack of units in the US, there's currently no useful pricing available.

    "At the time of this review, the PSU is readily available only in Asian markets. This is obviously because global shipping has been greatly affected by the coronavirus pandemic, but it makes it very difficult for us to reach a solid conclusion without knowing the retail price of the product"
  • StrangerGuy - Thursday, May 14, 2020 - link

    Nah its because Asia is now the more critical market even before Covid. China never had the US drought of MSI B450 Mortar/Tomahawk boards during the Zen 2 launch period and AMD is more popular there than the US.

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