CoolerMaster M1000 1kW PSU, 30% load
| Voltage line |
Power load |
Voltage line |
Power load |
| 3,3V |
10A |
12V2 |
3A |
| 5V |
10A |
12V5 |
3A |
| 12V1 |
5A |
12V6 |
3A |
3.3V |
5V |
12V1 |
12V2 |
12V3 |
12V4 |
CoolerMaster M1000 1kW PSU, 50% load
| Voltage line |
Power load |
Voltage line |
Power load |
| 3,3V |
10A |
12V2 |
9A |
| 5V |
10A |
12V5 |
9A |
| 12V1 |
9A |
12V6 |
9A |
3.3V |
5V |
12V1 |
12V2 |
12V3 |
12V4 |
CoolerMaster M1000 1kW PSU, 75% load
| Voltage line |
Power load |
Voltage line |
Power load |
| 3,3V |
20A |
12V2 |
12A |
| 5V |
20A |
12V5 |
12A |
| 12V1 |
14A |
12V6 |
9A |
3.3V |
5V |
12V1 |
12V2 |
12V3 |
12V4 |
CoolerMaster M1000 1kW PSU, 100% load
| Voltage line |
Power load |
Voltage line |
Power load |
| 3,3V |
20A |
12V2 |
16A |
| 5V |
20A |
12V5 |
18A |
| 12V1 |
17A |
12V6 |
18A |
3.3V |
5V |
12V1 |
12V2 |
12V3 |
12V4 |
CoolerMaster M1000 1kW PSU, 30-100% load voltage regulation test
3.3V |
5V |
12V1 |
12V2 |
12V3 |
12V4 |
CoolerMaster M1000 1kW PSU, efficiency graph
Power load |
30% |
40% |
50% |
60% |
70% |
80% |
90% |
100% |
Efficiency |
75% |
77% |
82% |
83% |
82% |
81% |
80% |
79% |
The performance of the M1000 is very good, even for a unit of its class. The voltage lines are very close to the specified outputs and they hardly fluctuate when the load is stable. When very large load changes take place, the voltage regulation unit reacts fast enough to keep the lines within a 3% difference. We have seen better regulation circuits, but the one in the M1000 is certainly noteworthy as well. Remember that we kept two 12V lines out during our testing and we were stressing the other 6 lines to their limit.
Although the efficiency of the M1000 is not very good at low loads, it substantially improves as the load increases and stays near 80%, which is a good efficiency for a modern PSU. The 135mm fan on the unit is very quiet and only becomes audible above 50% load, but even at 100% load it is not overly loud. Despite that, the unit remains remarkably cool for its efficiency and power output, even at high loads. It should be a good match for HTPC cases which require low heat generation and minimal noise output.
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