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.

OCZ Fatal1ty 700w SM-268+ Results @ Room Temp
   +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.

OCZ Fatal1ty 700w SM-268+ Results @ 50°c
   +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!

OCZ Fatal1ty 700w Scope Results @ 50c
   +3.3v  +5.0v  +12v1  +12v2
Test 1
(Low)
T1_3.3V T1_5V T1_12V
Test 2
(Med)
t2_3.3v t2_5v t2_12v  – –
Test 3
(High)
t3_3.3v t3_5v t3_12v  – –
Test 4
(Full)
t4_3v t4_5v t4_12v   –
Test 5
(x-load)
t5_3.3v t5_5v t5_12v  – –
Test 6
(x-load)
t6_3.3v t6_5v t6_12v  – –

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.