Thermaltake Toughpower PT 850 ATX v3.1 PSU Review

Load Regulation

It measures the stability of the output voltage when the load connected to the power supply varies.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
10% 5.258A 1.994A 1.982A 0.991A 85.003 88.034% 397 <6.0 40.1°C 0.98
12.060V 5.015V 3.33V 5.047V 96.54 45.49°C 115.06V
20% 11.536A 2.993A 2.976A 1.193A 169.938 91.547% 396 <6.0 40.63°C 0.99
12.051V 5.012V 3.326V 5.03V 185.629 47.39°C 115.02V
30% 18.174A 3.493A 3.476A 1.396A 254.938 92.28% 396 <6.0 41.29°C 0.993
12.044V 5.01V 3.323V 5.014V 276.263 50.41°C 115V
40% 24.827A 3.994A 3.976A 1.601A 340.028 92.465% 398 <6.0 41.88°C 0.993
12.036V 5.009V 3.32V 4.997V 367.735 54.05°C 114.97V
50% 31.120A 4.994A 4.975A 1.808A 424.828 92.158% 400 <6.0 42.06°C 0.993
12.028V 5.006V 3.317V 4.98V 460.977 58.21°C 114.93V
60% 37.401A 5.996A 5.976A 2A 509.288 91.782% 400 <6.0 42.5°C 0.995
12.020V 5.004V 3.313V 4.962V 554.889 63.01°C 114.91V
70% 43.753A 6.999A 6.98A 2.226A 594.679 91.283% 449 <6.0 43.43°C 0.996
12.012V 5.002V 3.31V 4.942V 651.467 68.34°C 114.88V
80% 50.142A 7.994A 7.981A 2.334A 679.547 90.783% 469 <6.0 39.18°C 0.997
11.999V 5.004V 3.308V 4.927V 748.536 65.56°C 114.82V
90% 56.908A 8.493A 8.473A 2.44A 764.848 89.871% 839 20.6 39.18°C 0.997
11.991V 5.004V 3.304V 4.917V 851.054 65.23°C 114.82V
100% 63.440A 8.994A 8.994A 3.075A 849.68 89.186% 951 24.2 40.01°C 0.998
11.979V 5.003V 3.302V 4.878V 952.698 67.4°C 114.78V
110% 69.805A 9.995A 10.094A 3.082A 934.243 88.546% 1033 27.3 40.91°C 0.998
11.976V 5.002V 3.299V 4.868V 1055.092 69.96°C 114.75V
CL1 0.116A 13.229A 13.174A 0A 111.29 82.901% 641 13 41.85°C 0.986
12.056V 5.004V 3.317V 5.068V 134.246 56.11°C 115.05V
CL2 0.115A 19.986A 0A 0A 101.368 81.23% 1646 39.8 40.43°C 0.985
12.060V 5.002V 3.331V 5.078V 124.791 45.9°C 115.05V
CL3 0.115A 0A 19.921A 0A 67.379 74.646% 1585 40 41.44°C 0.978
12.057V 5.014V 3.313V 5.075V 90.266 45.41°C 115.06V
CL4 70.822A 0A 0A 0A 849.461 84.119% 1110 29 46.03°C 0.981
11.995V 5.005V 3.311V 5.028V 943.7 65.1°C 114.78V

Load regulation is within tight enough at 12V and 5V, but loose at 3.3V.

Test 12V 5V 3.3V 5VSB DC/AC (Watts) Efficiency Fan Speed (RPM) PSU Noise (dB[A]) Temps (In/Out) PF/AC Volts
20W 1.232A 0.498A 0.495A 0.197A 20.006 72.205% 391 <6.0 36°C 0.898
12.065V 5.017V 3.334V 5.085V 27.708 45.79°C 115.08V
40W 2.710A 0.698A 0.693A 0.295A 40.002 82.701% 393 <6.0 37.12°C 0.951
12.064V 5.016V 3.333V 5.08V 48.367 43.76°C 115.07V
60W 4.190A 0.897A 0.891A 0.394A 60 86.446% 397 <6.0 38.44°C 0.967
12.062V 5.015V 3.332V 5.075V 69.405 43.77°C 115.06V
80W 5.664A 1.097A 1.09A 0.493A 79.943 88.311% 397 <6.0 39.14°C 0.978
12.060V 5.015V 3.331V 5.069V 90.526 44.56°C 115.06V

A glance at the light-load table is always useful, as the PSU typically operates at light loads.

Ripple Suppression

Ripple in power supplies refers to the small, unwanted AC voltage fluctuations superimposed on the DC output. It occurs due to imperfect filtering during the AC-to-DC conversion. Lower ripple is highly preferable because it ensures a cleaner, more stable DC output, reducing noise and potential interference in sensitive electronics, improving performance, and extending component lifespan. High ripple can cause instability, overheating, or damage to connected devices.

Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 17.2 mV 12.0 mV 10.0 mV 10.7 mV Pass
20% Load 23.2 mV 12.1 mV 11.9 mV 11.3 mV Pass
30% Load 26.0 mV 13.8 mV 11.0 mV 12.3 mV Pass
40% Load 28.8 mV 13.7 mV 11.3 mV 11.7 mV Pass
50% Load 31.2 mV 14.3 mV 11.4 mV 12.2 mV Pass
60% Load 32.6 mV 13.2 mV 11.5 mV 12.2 mV Pass
70% Load 34.3 mV 13.4 mV 11.7 mV 12.5 mV Pass
80% Load 36.0 mV 13.8 mV 13.0 mV 13.1 mV Pass
90% Load 31.4 mV 17.1 mV 14.9 mV 18.2 mV Pass
100% Load 30.4 mV 15.1 mV 13.2 mV 13.1 mV Pass
110% Load 31.8 mV 18.5 mV 15.6 mV 17.6 mV Pass
Crossload 1 20.6 mV 14.2 mV 11.7 mV 10.3 mV Pass
Crossload 2 20.6 mV 15.5 mV 11.6 mV 10.7 mV Pass
Crossload 3 17.6 mV 11.9 mV 12.6 mV 10.3 mV Pass
Crossload 4 30.2 mV 16.4 mV 13.9 mV 16.7 mV Pass

Ripple suppression is good overall.

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