OCZ Fatal1ty 700w ATX PSU
Simulated Load Testing
To provide our readers with the most accurate results, Overclock3D uses a professional grade SunMoon SM-268+ ATE load tester capable of placing a sustained load of 1690w across a total of six rails (including +5vsb and -12v) on the PSU. Unlike our previous resistor-based load tester, the SM-268+ gives us the ability to adjust amperage loads in increments as small as 0.01A while also measuring voltages and wattage readings on-screen.
During today’s tests, we will be placing the Fatal1ty under 25%, 50%, 75% and 100% load levels at both room temperature and inside a hot box regulated to a temperature of around 50°C. Additional cross load tests will also be performed under these conditions to simulate how the PSU would perform with a heavily uneven distribution of load.
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OCZ Fatal1ty 700w SM-268+ Results @ Room Temp
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| +3.3v | +5.0v | +12v1 | +12v2 | +5vSB | -12v | AC Watts / DC Watts |
Efficiency | Intake / Exhaust |
Δ Temp | |
| Test 1 (Low) |
3.75A | 3.75A | 12.00A | – | 0.75A | 0.20A | 228w / 183w |
80.26% | 21.7°C / 28.4°C |
6.7°C |
| 3.36v | 5.06v | 12.10v | – | 4.97v | -12.03v | |||||
| Test 2 (Med) |
7.50A | 7.50A | 24.00A | – | 1.5A | 0.40A | 428w / 363w |
84.81% | 22.4°C / 31.6°C |
7.2°C |
| 3.34v | 5.03v | 12.02v | – | 4.93v | -12.06v | |||||
| Test 3 (High) |
11.25A | 11.25A | 36.00A | – | 2.25A | 0.60A | 633w / 540w |
85.30% | 22.5°C / 33.2°C |
10.7°C |
| 3.31v | 5.00v | 11.94v | – | 4.88v | -12.08v | |||||
| Test 4 (Full) |
15.00A | 15.00A | 48.00A | – | 3.00A | 0.80A | 850w / 720w |
84.70% | 22.4°C / 37.8°C |
15.4°C |
| 3.27v | 4.98v | 11.88v | – | 4.84v | -12.10v | |||||
| Test 5 (x-load) |
20.00A | 20.00A | 1.00A | – | 0.75A | 0.20A | 256w / 186w |
72.65% | 22.8°C / 32.9°C |
10.1°C |
| 3.33v | 5.02v | 12.14v | – | 4.92v | -12.07v | |||||
| Test 6 (x-load) |
3.00A | 5.00A | 56.00A | – | 0.75A | 0.20A | 841w / 716w |
85.13% | 23.4°C / 36.4°C |
13.0°C |
| 3.31v | 5.01v | 11.90v | – | 4.92v | -12.11v | |||||
You’ll have to excuse me for jumping right to the end of the results, but as we can see from Test 5, the OCZ Fatal1ty DOES NOT like being heavily cross loaded on the +3.3v and +5v rails. Even though the voltage results remain quite reasonable, the efficiency levels drop to a rather nasty 72.65%. Of course, unless you’re running some archaic PC like a 386SX it’s highly unlikely you’ll ever see results like this in real life.
The rest of the results are above average, but nothing really stands out as “woweee” great. Voltage outputs start quite high in Test 1 and drop by around 2-3% by the time we reach Test 4. With the exception of Test 5, efficiency sits at around 85% and only drops as low as 80% when very little load is exerted. Throughout the testing the unit remained extremely cool and didn’t get noticeably noisy at any time.
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OCZ Fatal1ty 700w SM-268+ Results @ 50°c
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| +3.3v | +5.0v | +12v1 | +12v2 | +5vSB | -12v | AC Watts / DC Watts |
Efficiency | Intake / Exhaust |
Δ Temp | |
| Test 1 (Low) |
3.75A | 3.75A | 12.00A | – | 0.75A | 0.20A | 231w / 183w |
79.22% | 51.3°C / 48.4°C |
-2.9°C |
| 3.36v | 5.06v | 12.10v | – | 4.97v | -12.04v | |||||
| Test 2 (Med) |
7.50A | 7.50A | 24.00A | – | 1.5A | 0.40A | 429w / 364w |
84.84% | 51.4°C / 49.5°C |
-1.9°C |
| 3.34v | 5.03v | 12.02v | – | 4.92v | -12.07v | |||||
| Test 3 (High) |
11.25A | 11.25A | 36.00A | – | 2.25A | 0.60A | 642w / 542w |
84.42% | 50.9°C / 52.5°C |
1.6°C |
| 3.31v | 5.00v | 11.94v | – | 4.88v | -12.07v | |||||
| Test 4 (Full) |
15.00A | 15.00A | 48.00A | – | 3.00A | 0.80A | 850w / 720w |
84.70% | 52.0°C / 58.5°C |
6.5°C |
| 3.27v | 4.97v | 11.88v | – | 4.83v | -12.12v | |||||
| Test 5 (x-load) |
20.00A | 20.00A | 1.00A | – | 0.75A | 0.20A | 259w / 185w |
71.42% | 51.5°C / 48.5°C |
-3.0°C |
| 3.33v | 5.02v | 12.14v | – | 4.92v | -12.06v | |||||
| Test 6 (x-load) |
3.00A | 5.00A | 56.00A | – | 0.75A | 0.20A | 841w / 716w |
85.13% | 51.1°C / 53.7°C |
2.6°C |
| 3.31v | 5.00v | 11.90v | – | 4.92v | -12.11v | |||||
Popping the Fatal1ty inside what has been affectionately labeled as the “Pie Oven” by members of the OC3D Forums, we get the chance to see how the unit performs at a baking hot 50°C. Interestingly, very little changes across the board, with the voltage outputs remaining almost identical to the room temperature results and the only visible differences being noticed in the efficiency levels that drop by around 1%.
Testament to the cool running of the unit as seen in the room temperature tests, the Fatal1ty adds very little additional heat to the intake temperatures….in fact, in most cases the exhaust temps are actually LOWER than intake!
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OCZ Fatal1ty 700w Scope Results @ 50c
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| +3.3v | +5.0v | +12v1 | +12v2 | |
| Test 1 (Low) |
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| Test 2 (Med) |
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| Test 3 (High) |
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| Test 4 (Full) |
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| Test 5 (x-load) |
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| Test 6 (x-load) |
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Finishing up with some shots from the scope during the 50°C tests, I think it’s fair to say that the Fatal1ty did pretty well. Ripple and noise on the +12v rails stays at 40mV or less in all tests including crossload ones, and the +3.3v and +5.0v rails manage to stay under 15mV in everything but Test 5 where the +3.3v hits 17mV.
Now let’s move on to the conclusion where I attempt to condense the previous 4 pages into a few paragraphs.
