NZXT C1000 ATX v3.1 PSU Review

Load Regulation

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 6.442A 1.987A 1.969A 0.989A 100 84.598% 0 <6.0 44.38C 0.961
12.169V 5.035V 3.352V 5.056V 118.208 40.15C 115.11V
20% 13.890A 2.981A 2.957A 1.189A 199.949 88.918% 0 <6.0 45.35C 0.977
12.170V 5.033V 3.347V 5.049V 224.873 40.76C 115.08V
30% 21.685A 3.479A 3.455A 1.389A 299.994 91.091% 0 <6.0 46.31C 0.982
12.171V 5.032V 3.343V 5.041V 329.337 41.28C 115.05V
40% 29.505A 3.977A 3.954A 1.59A 399.692 91.356% 0 <6.0 47.12C 0.985
12.150V 5.031V 3.339V 5.033V 437.511 41.54C 115.02V
50% 36.973A 4.973A 4.947A 1.792A 499.443 91.03% 412 <6.0 42.38C 0.988
12.142V 5.028V 3.335V 5.024V 548.659 48.40C 115.01V
60% 44.523A 5.971A 5.943A 1.994A 600.015 90.527% 492 8.1 42.86C 0.99
12.133V 5.026V 3.332V 5.015V 662.799 49.49C 114.99V
70% 52.012A 6.97A 6.941A 2.198A 699.781 89.887% 700 17.4 43.14C 0.992
12.125V 5.023V 3.328V 5.006V 778.517 50.25C 114.97V
80% 59.578A 7.968A 7.94A 2.301A 799.78 89.11% 905 25.9 43.80C 0.993
12.116V 5.021V 3.325V 4.998V 897.527 51.88C 114.94V
90% 67.472A 8.469A 8.428A 2.405A 899.545 88.26% 1104 31.9 44.25C 0.993
12.110V 5.019V 3.322V 4.991V 1019.192 53.31C 114.9V
100% 75.140A 8.97A 8.949A 3.014A 999.528 87.322% 1368 38.9 45.68C 0.993
12.109V 5.017V 3.318V 4.977V 1144.65 55.87C 114.87V
110% 82.735A 9.97A 10.047A 3.019A 1100.136 86.309% 1628 43.0 46.59C 0.994
12.109V 5.015V 3.314V 4.969V 1274.641 57.47C 114.83V
CL1 0.115A 14.364A 14.35A 0A 121.29 81.095% 412 <6.0 40.10C 0.973
12.176V 5.026V 3.324V 5.059V 149.568 52.00C 115.1V
CL2 0.115A 21.874A 0A 0A 111.383 78.9% 411 <6.0 40.92C 0.97
12.180V 5.028V 3.334V 5.065V 141.173 51.42C 115.1V
CL3 0.114A 0A 21.943A 0A 73.984 73.65% 411 <6.0 40.52C 0.957
12.175V 5.038V 3.308V 5.06V 100.455 50.92C 115.11V
CL4 82.573A 0A 0A 0A 999.941 88.224% 1254 36.1 45.32C 0.993
12.109V 5.027V 3.32V 5.02V 1133.418 57.25C 114.86V

Load regulation is tight on all major rails but 3.3V.

Ripple Suppression

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 6.7 mV 6.5 mV 4.3 mV 4.9 mV Pass
20% Load 8.2 mV 5.2 mV 4.1 mV 5.3 mV Pass
30% Load 14.1 mV 5.1 mV 5.1 mV 5.2 mV Pass
40% Load 11.7 mV 11.5 mV 15.9 mV 5.6 mV Pass
50% Load 10.4 mV 6.6 mV 5.1 mV 6.7 mV Pass
60% Load 10.6 mV 8.1 mV 5.9 mV 6.1 mV Pass
70% Load 11.2 mV 12.2 mV 8.0 mV 6.1 mV Pass
80% Load 11.7 mV 7.4 mV 10.0 mV 6.7 mV Pass
90% Load 13.0 mV 8.3 mV 9.4 mV 8.4 mV Pass
100% Load 19.1 mV 8.9 mV 10.2 mV 9.2 mV Pass
110% Load 21.5 mV 8.6 mV 10.9 mV 9.6 mV Pass
Crossload 1 9.8 mV 8.7 mV 11.1 mV 7.4 mV Pass
Crossload 2 10.0 mV 7.8 mV 4.1 mV 6.8 mV Pass
Crossload 3 7.3 mV 5.8 mV 11.1 mV 6.9 mV Pass
Crossload 4 19.9 mV 6.8 mV 6.0 mV 8.0 mV Pass

Ripple suppression is good on all rails.

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7 thoughts on “NZXT C1000 ATX v3.1 PSU Review

  1. Hello,

    In a previous article you’ve mentioned that “ATX v3.1 PSUs are NOT ATX v3.0 because of the lower hold-up time”. However from my research, most manufacturers describe that the new spec is backward compatible. Maybe they are referring to connector compatibility, but given the results for this PSU, which provides hold up time around 30 ms, do you think that it will be possible to pair it with existing ATX3.0 GPUS until upgrading to NVidia 50x series or similar?

    Thanks in advance for your response.

    1. I don’t know to what they refer, but the fact is that the ATX v3.0 spec is tougher in hold-up time. Also this PSU yes, you can use it with any upcoming GPU, since the cable remains exactly the same (12VHPWR or 12V-2×6)

  2. Very impressive work! Thank you very much! 🙂

    I was wondering if you heard anything about the Straight Power 12 from be quiet? I have barely heard about this unit and I was hesitating between the Straight Power 12, a Corsair RMx/e or a NZXT C Gold for an RTX 4070 ti Super + i5-14600K system (850 – 1000W range).

    Thank you againt!

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