Huntkey Win7 6600 Power Supply Review
Load Tests
Contents
We conducted several tests with this power supply, as described in the article, “Hardware Secrets Power Supply Test Methodology.”
First we tested this power supply with five different load patterns, trying to pull around 20%, 40%, 60%, 80%, and 100% of its labeled maximum capacity (actual percentage used listed under “% Max Load”), watching the behavior of the reviewed unit under each load. In the table below, we list the load patterns we used and the results for each load.
If you add all the powers listed for each test, you may find a different value than what is posted under “Total” below. Since each output can have a slight variation (e.g., the +5 V output working at +5.10 V), the actual total amount of power being delivered is slightly different than the calculated value. In the “Total” row, we are using the real amount of power being delivered, as measured by our load tester.
The +12VA and +12VB inputs listed below are the two +12 V independent inputs from our load tester. During this test, the +12VA and +12VB inputs were connected to the single +12 V rail. (The EPS12V connector was installed on the +12VB input and the other connectors were installed on the +12VA input.)
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | 3.5 A (42 W) | 7 A (84 W) | 10.5 A (126 W) | 14 A (168 W) | 18 A (216 W) |
| +12VB | 3.5 A (42 W) | 7 A (84 W) | 10.5 A (126 W) | 14 A (168 W) | 17 A (204 W) |
| +5 V | 1 A (5 W) | 2 A (10 W) | 4 A (20 W) | 6 A (30 W) | 9 A (45 W) |
| +3.3 V | 1 A (3.3 W) | 2 A (6.6 W) | 4 A (13.2 W) | 6 A (19.8 W) | 9 A (29.7 W) |
| +5VSB | 1 A (5 W) | 1 A (5 W) | 1.5 A (7.5 W) | 2 A (10 W) | 2.5 A (12.5 W) |
| -12 V | 0.5 A (6 W) | 0.5 A (6 W) | 0.5 A (6 W) | 0.5 A (6 W) | 0.5 A (6 W) |
| Total | 102.4 W | 208.4 W | 294.8 W | 395.6 W | 503.3 W |
| % Max Load | 20.5% | 41.7% | 59.0% | 79.1% | 100.7% |
| Room Temp. | 46.0° C | 44.2° C | 43.9° C | 44.7° C | 44.4° C |
| PSU Temp. | 45.9° C | 45.9° C | 45.8° C | 46.4° C | 46.6° C |
| Voltage Regulation | Pass | Pass | Pass | Pass | Pass |
| Ripple and Noise | Pass | Pass | Pass | Pass | Pass |
| AC Power | 120.6 W | 247.2 W | 347.0 W | 474.4 W | 623.0 W |
| Efficiency | 84.9% | 84.3% | 85.0% | 83.4% | 80.8% |
| AC Voltage | 118.1 V | 117.0 V | 115.9 V | 115.1 V | 112.1 V |
| Power Factor | 0.976 | 0.983 | 0.989 | 0.994 | 0.997 |
| Final Result | Pass | Pass | Pass | Pass | Pass |
We had an interesting problem with the Huntkey Win7 6600: its protections are tightly configured. During our full load test, we had to increase the amount of current we were going to pull from the +12VA input from 17.5 A to 18 A, decrease the current on +12VB from 17.5 A to 17 A, and increase the current on +5 V and +3.3 V from 8 A to 9 A. If we tried to pull more from the +12 V outputs, the power supply would shut down. In fact, the power supply would shut down immediately if we tried to pull anything above 500 W from it.
Efficiency was between 80.8% and 85% during our tests. Therefore, this unit would be able to get the 80 Plus certification; however, the manufacturer chose not to.
Voltages were closer to their nominal values (3% regulation) during all tests, except the -12 V output during tests one and two, which was still inside the proper range at -11.42 V and -11.63 V, respectively. 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.
Let’s discuss the ripple and noise levels on the next page.