OCZ Fatal1ty 700 W 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 how the reviewed unit behaved 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 power listed for each test, you may find a different value than what is posted under “Total” below. Since each output can vary slightly (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. On the “Total” row we are using the real amount of power being delivered, as measured by our load tester.
This unit is based on a single rail design, so both +12V1 and +12V2 inputs from our load tester were connected to the single +12 V rail available.
|
Input |
Test 1 |
Test 2 |
Test 3 |
Test 4 |
Test 5 |
|
+12V1 |
5 A (60 W) |
10.5 A (126 W) |
15.5 A (186 W) |
20.5 A (246 W) |
25 A (300 W) |
|
+12V2 |
5 A (60 W) |
10.5 A (126 W) |
15.5 A (186 W) |
20.5 A (246 W) |
25 A (300 W) |
|
+5V |
1 A (5 W) |
2 A (10 W) |
4 A (20 W) |
6 A (30 W) |
10 A (50 W) |
|
+3.3 V |
1 A (3.3 W) |
2 A (6.6 W) |
4 A (13.2 W) |
6 A (19.8 W) |
10 A (33 W) |
|
+5VSB |
1 A (5 W) |
1.5 A (7.5 W) |
2 A (10 W) |
2.5 W (12.5 W) |
3 A (15 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 |
141.0 W |
284.7 W |
423.8 W |
561.4 W |
702.4 W |
|
% Max Load |
20.1% |
40.7% |
60.5% |
80.2% |
100.3% |
|
Room Temp. |
47.3° C |
48.1° C |
48.2° C |
49.1° C |
48.9° C |
|
PSU Temp. |
51.7° C |
52.3° C |
52.7° C |
51.8° C |
52.3° C |
|
Voltage Stability |
Pass |
Pass |
Pass |
Pass |
Pass |
|
Ripple and Noise |
Pass |
Pass |
Pass |
Pass |
Pass |
|
AC Power |
166 W |
322 W |
485 W |
652 W |
843 W |
|
Efficiency |
84.9% |
88.4% |
87.4% |
86.1% |
83.3% |
|
Final Result |
Pass |
Pass |
Pass |
Pass |
Pass |
OCZ Fatal1ty 700 W provides excellent efficiency, between 85% and 88% if you pull up to 80% (560 W) of its labeled capacity. At 100% load (700 W) efficiency dropped to 83.3%, but still above the 80% mark.
Noise and ripple were far below the maximum allowed, peaking only 60 mV at +12 V, half the maximum admissible. Noise and ripple levels at +5 V and +3.3 V outputs were amazing low, peaking only 10.4 mV and 13.6 mV when we pulled 700 W from this unit – the maximum allowed is 50 mV. All values are peak-to-peak.
Figure 18: Noise level at +12V1 with the reviewed power supply delivering 702.4 W (60 mV).
Figure
19: Noise level at +12V2 with the reviewed power supply delivering 702.4 W (51 mV).
Figure 20: Noise level at +5 V with the reviewed power supply delivering 702.4 W (10.4 mV).
Figure 21: Noise level at +3.3 V with the reviewed power supply delivering 702.4 W (13.6 mV).
Now let’s see if we can pull even more power from Fatal1ty 700 W.