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Corsair TX-M Series 750 W Review
Fan Noise »Efficiency
Using the results we gathered so far, we plotted a chart showing the PSU's efficiency at low loads and loads ranging from 10 to 110 percent of the maximum-rated capacity.
Efficiency starts high at ultra-light loads. Because of the resonant controller's burst operation, efficiency drops a bit and goes up again with higher loads.
10%–110% Load Testing
These tests reveal the PSU's load regulation and efficiency levels under high ambient temperatures and show how the fan-speed profile behaves under harsh operating conditions.| Load Regulation & Efficiency Testing Data - Corsair TX750M (2021) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Test | 12V | 5V | 3.3V | 5VSB | Power (DC/AC) | Efficiency | Fan Speed | PSU Noise | Temp (In/Out) | PF/AC Volts |
| 10% | 4.444A | 2.001A | 2.004A | 0.993A | 75.012W | 82.368% | 943 RPM | 24.4 dB(A) | 40.76°C | 0.838 |
| 12.020V | 4.998V | 3.294V | 5.035V | 91.069W | 46.67°C | 230.26V | ||||
| 20% | 9.909A | 3.005A | 3.01A | 1.194A | 149.971W | 89.201% | 963 RPM | 25.2 dB(A) | 41.05°C | 0.917 |
| 12.016V | 4.993V | 3.289V | 5.027V | 168.127W | 47.27°C | 230.26V | ||||
| 30% | 15.741A | 3.508A | 3.516A | 1.394A | 224.984W | 91.805% | 986 RPM | 26.3 dB(A) | 41.83°C | 0.947 |
| 12.002V | 4.99V | 3.285V | 5.021V | 245.066W | 48.56°C | 230.26V | ||||
| 40% | 21.601A | 4.012A | 4.024A | 1.596A | 300.082W | 92.398% | 981 RPM | 26 dB(A) | 42.04°C | 0.96 |
| 11.985V | 4.985V | 3.28V | 5.014V | 324.772W | 49.22°C | 230.26V | ||||
| 50% | 27.074A | 5.021A | 5.038A | 1.798A | 374.711W | 92.41% | 1033 RPM | 27.2 dB(A) | 42.24°C | 0.969 |
| 11.975V | 4.98V | 3.275V | 5.006V | 405.489W | 49.81°C | 230.26V | ||||
| 60% | 32.579A | 6.03A | 6.055A | 2A | 449.557W | 92.281% | 1056 RPM | 27.7 dB(A) | 43.24°C | 0.975 |
| 11.963V | 4.976V | 3.27V | 4.999V | 487.162W | 51.16°C | 230.26V | ||||
| 70% | 38.080A | 7.042A | 7.075A | 2.205A | 524.548W | 91.891% | 1167 RPM | 31.6 dB(A) | 43.84°C | 0.979 |
| 11.960V | 4.972V | 3.265V | 4.991V | 570.835W | 52.42°C | 230.26V | ||||
| 80% | 43.667A | 8.004A | 8.098A | 2.308A | 599.496W | 91.505% | 1232 RPM | 32.4 dB(A) | 44.03°C | 0.981 |
| 11.950V | 4.967V | 3.26V | 4.984V | 655.153W | 52.94°C | 230.26V | ||||
| 90% | 49.590A | 8.568A | 8.601A | 2.412A | 674.821W | 91.033% | 1306 RPM | 33.9 dB(A) | 44.77°C | 0.983 |
| 11.944V | 4.962V | 3.255V | 4.977V | 741.289W | 54.38°C | 230.26V | ||||
| 100% | 55.322A | 9.081A | 9.138A | 3.02A | 750.032W | 90.492% | 1375 RPM | 35.6 dB(A) | 45.43°C | 0.985 |
| 11.935V | 4.958V | 3.25V | 4.969V | 828.836W | 55.74°C | 230.26V | ||||
| 110% | 60.930A | 10.1A | 10.262A | 3.024A | 825.062W | 89.862% | 1448 RPM | 37.3 dB(A) | 46.98°C | 0.986 |
| 11.927V | 4.953V | 3.245V | 4.961V | 918.149W | 57.82°C | 230.26V | ||||
| CL1 | 0.117A | 15.728A | 15.751A | 0A | 131.333W | 82.142% | 1217 RPM | 32.2 dB(A) | 42.31°C | 0.913 |
| 12.018V | 4.98V | 3.276V | 5.016V | 159.884W | 49.4°C | 230.27V | ||||
| CL2 | 0.117A | 25.094A | 0A | 0A | 126.44W | 80.686% | 1135 RPM | 30.1 dB(A) | 43.59°C | 0.911 |
| 12.022V | 4.983V | 3.291V | 5.023V | 156.706W | 51.62°C | 230.27V | ||||
| CL3 | 0.116A | 0A | 25.202A | 0A | 83.892W | 73.951% | 1116 RPM | 29.6 dB(A) | 44.22°C | 0.873 |
| 12.018V | 4.995V | 3.273V | 5.02V | 113.443W | 53.69°C | 230.26V | ||||
| CL4 | 62.819A | 0A | 0A | 0A | 749.811W | 91.483% | 1282 RPM | 32.7 dB(A) | 45.89°C | 0.984 |
| 11.936V | 4.97V | 3.263V | 4.988V | 819.62W | 55.91°C | 230.26V | ||||
There is no problem delivering high loads at increased operating temperatures, and the fan's noise output stays low.
Light-Load Testing
In the following tests, we measure the PSU's efficiency at loads significantly lower than 10 percent of the maximum capacity—the lowest load the 80 PLUS standard measures. This is important for when a PC is idle with its power-saving features turned on.| Light Load Efficiency - Corsair TX750M (2021) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Test | 12V | 5V | 3.3V | 5VSB | Power (DC/AC) | Efficiency | Fan Speed | PSU Noise | Temp (In/Out) | PF/AC Volts |
| 20W | 1.240A | 0.5A | 0.5A | 0.198A | 20.008W | 75.575% | 824 RPM | 19.8 dB(A) | 36.82°C | 0.546 |
| 11.986V | 5.002V | 3.299V | 5.042V | 26.474W | 39.92°C | 230.25V | ||||
| 40W | 2.720A | 0.7A | 0.7A | 0.298A | 40.009W | 74.044% | 889 RPM | 22.4 dB(A) | 37.48°C | 0.737 |
| 12.022V | 5.001V | 3.298V | 5.04V | 54.034W | 41.11°C | 230.26V | ||||
| 60W | 4.204A | 0.9A | 0.901A | 0.397A | 60.009W | 80.318% | 911 RPM | 23.3 dB(A) | 38.14°C | 0.8 |
| 12.023V | 5V | 3.296V | 5.038V | 74.714W | 42.28°C | 230.26V | ||||
| 80W | 5.684A | 1.1A | 1.102A | 0.497A | 79.972W | 83.489% | 964 RPM | 25.2 dB(A) | 39.61°C | 0.846 |
| 12.022V | 4.999V | 3.295V | 5.036V | 95.787W | 44.48°C | 230.25V | ||||
With 40 W load, efficiency drops.
Super Light-Load Testing
We measure the PSU's efficiency with a 10 W load if its maximum power is 500 W or less in the following tests. If the PSU is stronger, we apply 2% of its maximum-rated-capacity load.| Super-Light Load Efficiency - Corsair TX750M (2021) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 12V | 5V | 3.3V | 5VSB | Power (DC/AC) | Efficiency | Fan Speed | PSU Noise | Temp (In/Out) | PF/AC Volts |
| 1.048A | 0.264A | 0.264A | 0.051A | 15.01W | 71.796% | 788 RPM | 17 dB(A) | 24.96°C | 0.779 |
| 11.980V | 4.999V | 3.297V | 5.044V | 20.906W | 26.18°C | 115.12V | |||
The PSU manages to meet the strict ATX specification requiring more than 70% efficiency with 2% load.
5VSB Efficiency
| 5VSB Efficiency - Corsair TX750M (2021) | ||||
|---|---|---|---|---|
| Test # | 5VSB | Power (DC/AC) | Efficiency | PF/AC Volts |
| 1 | 0.1A | 0.505W | 71.294% | 0.032 |
| 5.046V | 0.708W | 230.24V | ||
| 2 | 0.25A | 1.262W | 77.173% | 0.071 |
| 5.045V | 1.635W | 230.24V | ||
| 3 | 0.55A | 2.775W | 79.619% | 0.138 |
| 5.044V | 3.485W | 230.25V | ||
| 4 | 1A | 5.044W | 80.214% | 0.211 |
| 5.043V | 6.288W | 230.25V | ||
| 5 | 1.5A | 7.564W | 81.556% | 0.261 |
| 5.042V | 9.275W | 230.25V | ||
| 6 | 3.001A | 15.116W | 80.565% | 0.337 |
| 5.038V | 18.762W | 230.25V | ||
The 5VSB rail is efficient.
Power Consumption in Idle and Standby
| Idle / Standby - Corsair TX750M (2021) | ||||||
|---|---|---|---|---|---|---|
| Mode | 12V | 5V | 3.3V | 5VSB | Power (AC) | PF/AC Volts |
| Idle | 11.963V | 4.997V | 3.297V | 5.046V | 3.958W | 0.155 |
| 230.24V | ||||||
| Standby | 0.084W | 0.004 | ||||
| 230.24V | ||||||
Power consumption in standby is low.
Oct 4th, 2024 10:22 EDT
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