NZXT E650 650W Power Supply

REVIEW INFORMATION
SUPPLIED BY: NZXT
PRODUCT: NZXT E650 650W
PROD LINK: E650 Product Page
PRICE: $148.46 @ NewEgg
Price is at time of testing!


NZXT E650 – Overshoot Transient Tests
VSB On VSB to Full, 12V Off to Full, 12V

Unfortunately, with this unit being based on the Focus Plus platform, we do find that it’s not quite as in love with the smooth and continuous scoring point as we would like it to be. Seasonic is still doing that staggered power up thing on the 12V side of things, which will need to be scored against later. But the 5VSB rail is at least perfect looking, so part of that scoring point is safe.

Let’s try to heat things up. The weather outside got warmer, so the house furnace hasn’t been running leading to a cool basement. So, we may not get the hot box very warm at all, but we should get at least close to forty degrees.

NZXT E650 – Hot Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
AC
Input
Eff. P.F. Fan
RPM
Intake/
Exhaust
Progressive Load Tests
1 1A 1A 4.6A 64.7W/
77.0W
118.1V 84.0% 0.969 0 25°C/
28°C
3.323V 5.00V 11.98V
2 1.5A 1.5A 9.5A 128.9W/
145.9W
117.1V 88.4% 0.984 0 28°C/
34°C
3.325V 5.00V 11.99V
3 3.5A 3.5A 24A 324.4W/
361.7W
117.2V 89.7% 0.991 1110 33°C/
42°C
3.319V 5.00V 11.99V
4 5A 5A 36A 483.2W/
545.0W
116.9V 88.7% 0.991 2040 36°C/
45°C
3.316V 4.99V 11.99V
5 7A 7A 48A 648.0W/
746.5W
116.8V 86.8% 0.992 2188 38°C/
52°C
3.311V 4.99V 11.98V
Crossload Tests
CL1 12A 12A 0A 100.9W/
121.3W
118.5V 83.2% 0.982 600 28°C/
38°C
3.316V 4.99V 12.01V
CL2 0A 0A 54A 647.6W/
742.1W
114.5V 87.3% 0.992 2160 37°C/
50°C
3.326V 5.00V 11.97V

And there you go… thirty-eight degrees, no problem. Unless you count the fan going nuts as a problem, that is. Once again, the fan controller was very aggressive.

Over on the efficiency side of things, nothing much changed this time out. The unit does have a little bit of trouble on test five hitting that magic 87% number, and test three has the same thing going on as the cold tests, but both numbers are within that 1% so I’ll give it the pass today.

Really, though… what more can I say about the voltage regulation at this point? We have a slight improvement there on cold test numbers from two outputs, with the 3.3V now doing 0.45% and the 5V now managing 0.20%. The 12V slides a bit to 0.33%, but that’s fine with me. This time out, we now have an average of 0.33%. Still mythic, and slightly more mythic than it was on the last page.

I’m happy with this. Let’s see what the scope shots look like.

NZXT E650 – Oscilloscope
Test # +3.3V +5V +12V
1
2
3
4
5
CL1
CL2

Looks like about 9mV on the 3.3V rail, 7mV on the 5V rail, and 25mV on the 12V rail. Slam dunk, all outputs excellent.

Let’s take this apart now, and… immediately cuss the air blue, because the fan wires just pulled right out of the blasted connector. Doh!