Cougar CMX V2 700 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 its 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.
As you can see, the Cougar CMX V2 700 W passed our tests, with the manufacturer fixing the huge voltage regulation problem at +3.3 V output that we’ve seen with the original CMX 700 W.
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | +11.96 V | +11.90 V | +11.86 V | +11.77 V | +11.67 V |
| +12VB | +11.94 V | +11.85 V | +11.78 V | +11.68 V | +11.54 V |
| +5 V | +5.06 V | +5.04 V | +5.01 V | +4.98 V | +4.96 V |
| +3.3 V | +3.30 V | +3.28 V | +3.26 V | +3.23 V | +3.20 V |
| +5VSB | +4.98 V | +4.95 V | +4.92 V | +4.89 V | +4.85 V |
| -12 V | -11.63 V | -11.76 V | -11.88 V | -11.96 V | -12.05 V |
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | -0.33% | -0.83% | -1.17% | -1.92% | -2.75% |
| +12VB | -0.50% | -1.25% | -1.83% | -2.67% | -3.83% |
| +5 V | 1.20% | 0.80% | 0.20% | -0.40% | -0.80% |
| +3.3 V | 0.00% | -0.61% | -1.21% | -2.12% | -3.03% |
| +5VSB | -0.40% | -1.00% | -1.60% | -2.20% | -3.00% |
| -12 V | 3.18% | 2.04% | 1.01% | 0.33% | -0.41% |
Let’s discuss the ripple and noise levels on the next page.