Reviews - Seasonic Focus Plus 750W Gold
Sample Provided by: Seasonic USA (By OklahomaWolf on Mon, Jul-10-2017)

Page 4 - Hot Testing
Overshoot Transient Testing - Seasonic Focus Plus 750W
VSB On
VSB to Full, 12V
Off to Full, 12V

Oh, that's a close one. A very close one. There is the tiniest of blips on the 12V side of things, but for the most part this is a major improvement on the Prime units. I'm going to be nice today and let them have the nod. But I'm also going to point out I have two more Focus Plus units and will be watching them like I watched the fudge booth at the fair last week.

It's really hot in here today, but I'm going to fight past it and get you some hot tests results right now.

Results from Seasonic Focus Plus 750W HOT load tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Intake/
Exhaust
Progressive load tests
1 1A 1A 5.2A 76.0W/
88.9W
114.1V 85.5% 0.972 32C/
35C*
3.319V 5.03V 12.08V
2 1.5A 1.5A 12A 164.9W/
183.5W
114.7V 89.9% 0.990 35C/
43C*
3.318V 5.03V 12.08V
3 3A 3A 29A 385.0W/
426.1W
114.3V 90.4% 0.991 37C/
55C
3.314V 5.02V 12.07V
4 4.5A 4.5A 44A 581.0W/
656.4W
113.5V 88.5% 0.992 41C/
61C
3.310V 5.02V 12.07V
5 6A 6A 57A 754.7W/
872.3W
112.7V 86.5% 0.992 44C/
67C
3.305V 5.01V 12.06V
CL1 12A 12A 0A 104.7W/
124.6W
114.8V 84.0% 0.983 34C/
45C*
3.308V 5.01V 12.08V
CL2 0A 0A 62A 752.7W/
865.5W
112.5V 87.0% 0.993 43C/
65C
3.317V 5.02V 12.06V

Of course, the unit just had to go and beat its own numbers here, didn't it? The 3.3V rail is now at 0.42% regulation, bringing all three into mythic territory, while the other two are just as awesome as they were cold. Now, our average is 0.33%. Still mythic.

Unfortunately, the efficiency target was a little harder to hit for it this time. It now needs my 1% allowance to get it on test five. But this does count as a pass, so onward we will go.

The fan spent less time in fanless mode this time... it only stayed off for three tests, and got going during test three. That's to be expected, especially given the unit was struggling a bit for efficiency by test five.

At any rate, the unit did what it was supposed to do all the way up to forty-four degrees so I'm not complaining.

Oscilloscope Measurements - Seasonic Focus Plus 750W
Test #
+3.3V
+5V
+12V
Test
1
Test
2
Test
3
Test
4
Test
5
Test
CL1
Test
CL2

Ripple results also look outstanding to me, helped no doubt by the extra in cable capacitors. I've got 6mV on the minor rails and 22.5mV on the 12V rail.

If you're complaining about that, stop it right now.



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