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
DC Watts/ AC Watts
Progressive load tests
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
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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