Cooler Master Extreme 2 475 W Power Supply Review
Voltage Regulation
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. In the tables below, we show the voltage results for the reviewed power supply. We marked in red the values that were outside the allowed range.
| Input | Test 1 | Test 2 | Test 3 | Test 4 |
| +12VA | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +12VB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5 V | +5.20 V | +5.20 V | +5.19 V | +5.20 V |
| +3.3 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5VSB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| -12 V | -11.61 V | -11.64 V | -11.69 V | -11.71 V |
| Input | Test 5 | Test 6 | Test 7 | Test 8 |
| +12VA | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +12VB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5 V | +5.18 V | +5.18 V | +5.16 V | +5.17 V |
| +3.3 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5VSB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| -12 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| Input | Test 9 | Test 10 | Test 11 | Test 12 |
| +12VA | +11.61 V | +11.55 V | +11.53 V | +11.49 V |
| +12VB | +11.62 V | +11.57 V | +11.54 V | +11.49 V |
| +5 V | +5.16 V | +5.17 V | +5.18 V | +5.19 V |
| +3.3 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5VSB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| -12 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| Input | Test 13 | Test 14 | Test 15 | Test 16 |
| +12VA | +11.43 V | +11.39 V | +11.37 V | +11.33 V |
| +12VB | +11.42 V | +11.37 V | +11.34 V | +11.31 V |
| +5 V | +5.19 V | +5.18 V | +5.19 V | +5.20 V |
| +3.3 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| +5VSB | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
| -12 V | ≤ 3% | ≤ 3% | ≤ 3% | ≤ 3% |
Let’s discuss the ripple and noise levels on the next page.