Enermax Triathlor FC 650 W Power Supply Review
Voltage Regulation Tests
Contents
The ATX12V specification states that positive voltages must be within 5% of their nominal values, and negative voltages must be within 10% of their nominal values. We consider a power supply as “flawless” if it shows voltages within 3% of their nominal values. In the table below, you can see the power supply voltages during our tests and, in the following table, the deviation, in percentage, of their nominal values.
The main positive voltages (+12 V, +5 V, and +3.3 V) were within 3% of their nominal values when we pulled up to 80% of the unit’s labeled wattage, but when we pulled 650 W, the voltages at +5 V and +3.3 V got outside this tighter range, but still within the allowed margin.
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | +12.14 V | +12.10 V | +12.06 V | +12.02 V | +11.96 V |
| +12VB | +12.14 V | +12.09 V | +12.02 V | +11.96 V | +11.90 V |
| +5 V | +5.02 V | +4.98 V | +4.92 V | +4.88 V | +4.84 V |
| +3.3 V | +3.29 V | +3.26 V | +3.21 V | +3.19 V | +3.15 V |
| +5VSB | +5.00 V | +4.93 V | +4.85 V | +4.81 V | +4.75 V |
| -12 V | -11.32 V | -11.43 V | -11.54 V | -11.66 V | -11.86 V |
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | 1.17% | 0.83% | 0.50% | 0.17% | -0.33% |
| +12VB | 1.17% | 0.75% | 0.17% | -0.33% | -0.83% |
| +5 V | 0.40% | -0.40% | -1.60% | -2.40% | -3.20% |
| +3.3 V | -0.30% | -1.21% | -2.73% | -3.33% | -4.55% |
| +5VSB | 0.00% | -1.40% | -3.00% | -3.80% | -5.00% |
| -12 V | 5.67% | 4.75% | 3.83% | 2.83% | 1.17% |
Let’s discuss the ripple and noise levels on the next page.