Reviews - Corsair TX750 V2 750W
Sample Provided by: Corsair (By OklahomaWolf on Mon, Apr-04-2011)

Page 3 - Hot Testing
Overshoot Transient Testing - Corsair TX750 V2
VSB On
VSB to Full, 12V
Off to Full, 12V

It is time to have a peek at the power on transients every SMPS design exhibits. Basically, when you apply power to any SMPS, you get a small spike on the outputs. We want to see those in spec. And indeed, that is the case with this unit. All spikes, and you can see them clearly in the above scope shots, are in spec. I've seen units do better, and I've seen units do worse. All in all, there's nothing to complain about here. It passes this stress test, just like our friend Young MC.

Let's get the real party started now. Time to cram this unit into the hot box and roast it alive.

Results from Corsair TX750 V2 HOT load tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
Eff. P.F. Intake/
Exhaust
Progressive load tests
1 1A 1A 11A 146.4W/
175.8W
83.3% 0.988 27°C/
30°C
3.35V 5.07V 12.10V
2 2.5A 2.5A 22A 294.1W/
342.5W
85.9% 0.989 32°C/
38°C
3.33V 5.05V 12.08V
3 4A 4A 34A 453.0W/
528.8W
85.7% 0.995 36°C/
44°C
3.31V 5.03V 12.05V
4 5.5A 5.5A 45A 599.8W/
709.4W
84.6% 0.996 40°C/
50°C
3.29V 5.01V 12.04V
5 7A 7A 56A 748.2W/
900.9W
83.1% 0.998 45°C/
60°C
3.27V 5.00V 12.02V
Crossload tests
CL1 18A 18A 1A 166.7W/
214.0W
77.9% 0.986 35°C/
42°C
3.30V 5.02V 12.07V
CL2 1A 1A 62A 758.4W/
909.6W
83.4% 0.998 43°C/
57°C
3.30V 5.02V 12.02V

You know what's on and poppin?' Not this unit. It's on, but it's not poppin.' In fact, it's dead set on impressing me. I mean, look at the two crossload tests - with a 17A difference in loading, the minor rails went nowhere. And I mean nowhere. Not one flicker in the voltage readings on either rail. That is VERY impressive. That said, the 3.3V rail did let itself slide a bit in the progressive tests. It exhibited 0.01 volts more drop than it did cold. Big deal... it's still well inside the 3% mark, which I consider average. The 12V did just about the same thing, but is still inside 1% in that case. Only the 5V rail managed to hold the same voltage drop it did cold.

Efficiency again had no trouble meeting Bronze, even with the temperature in the hot box soaring to forty five degrees. Most excellent. Let's see what the scope shots look like now.

Oscilloscope Measurements - Corsair TX750 V2
Test #
+3.3V
+5V
+12V
LLT
Test
1
Test
2
Test
3
Test
4
Test
5
Test
CL1
Test
CL2

Young MC comes off. He'd just like us to know that. And this unit comes off, too... like one fantastic performing power supply. The minor rails are nice, holding at around 25mV at the worst. But the 12V is even nicer - it manages to stay under 30mV. This puts it into competition with some of the best I've tested, even if it doesn't quite reach the heights that some have been able to. Quite simply, this unit rocks from Iowa to Idaho, Canada to Mexico.

But it's time for something else to come off. The lid. I'm going to take this puppy apart on the next page.



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