Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

Page 4 of 12:

Load Regulation, Hold-Up Time & Inrush Current

To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.

Seasonic SSR-600TL

EVGA SuperNOVA G3 650W

Corsair RM650x

Primary Rails And 5VSB Load Regulation

Load Regulation testing is detailed here.

Image 1 of 8

Hold-Up Time

Our hold-up time tests are described in detail here.

Image 1 of 7

The hold-up time we measure is super-long at 41ms! This is the first time we've tested a PSU capable of exceeding 40ms. The power-good signal is accurate as well, with a delay of close to 5ms.

Inrush Current

For details on our inrush current testing, please click here.

Image 1 of 2

The inrush current with 115V input is low. However, it's on the high side when we test with 230V input.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the SSR-600TL's efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load in increments of 10 percentage points.

We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

Swipe to scroll horizontally

Test #	12V	5V	3.3V	5VSB	DC/AC (Watts)	Efficiency	Fan Speed	PSU Noise	Temps (In/Out)	PF/AC Volts
1	3.152A	1.983A	1.972A	0.997A	59.929	89.810%	0 RPM	<6.0 dB(A)	43.80°C	0.945
12.164V	5.041V	3.343V	5.015V	66.729	37.70°C	115.29V
2	7.298A	2.976A	2.960A	1.198A	119.660	92.300%	0 RPM	<6.0 dB(A)	44.52°C	0.983
12.163V	5.040V	3.342V	5.011V	129.643	37.87°C	115.21V
3	11.804A	3.474A	3.441A	1.399A	179.568	93.269%	0 RPM	<6.0 dB(A)	44.98°C	0.992
12.162V	5.040V	3.341V	5.005V	192.526	38.08°C	115.13V
4	16.316A	3.969A	3.950A	1.601A	239.601	93.393%	0 RPM	<6.0 dB(A)	45.76°C	0.993
12.160V	5.039V	3.340V	5.000V	256.550	38.46°C	115.05V
5	20.495A	4.962A	4.940A	1.802A	299.693	93.308%	0 RPM	<6.0 dB(A)	46.86°C	0.995
12.159V	5.038V	3.339V	4.995V	321.186	39.33°C	115.06V
6	24.679A	5.953A	5.929A	2.004A	359.813	92.907%	0 RPM	<6.0 dB(A)	48.67°C	0.992
12.157V	5.038V	3.339V	4.991V	387.284	40.51°C	114.98V
7	28.829A	6.949A	6.917A	2.207A	419.540	92.601%	0 RPM	<6.0 dB(A)	50.42°C	0.992
12.156V	5.037V	3.338V	4.986V	453.064	41.33°C	114.89V
8	33.046A	7.943A	7.910A	2.410A	480.051	92.258%	0 RPM	<6.0 dB(A)	52.65°C	0.993
12.154V	5.037V	3.337V	4.981V	520.338	42.76°C	114.81V
9	37.595A	8.441A	8.393A	2.410A	539.364	91.774%	0 RPM	<6.0 dB(A)	54.01°C	0.994
12.152V	5.036V	3.336V	4.980V	587.707	43.64°C	114.81V
10	42.210A	8.939A	8.904A	2.512A	600.069	91.425%	0 RPM	<6.0 dB(A)	55.02°C	0.995
12.150V	5.035V	3.336V	4.978V	656.353	44.26°C	114.72V
11	47.161A	8.940A	8.904A	2.512A	660.122	91.077%	0 RPM	<6.0 dB(A)	57.43°C	0.995
12.148V	5.035V	3.335V	4.977V	724.796	45.18°C	114.63V
CL1	0.733A	12.002A	12.000A	0.000A	109.494	88.811%	0 RPM	<6.0 dB(A)	54.21°C	0.980
12.158V	5.038V	3.343V	5.062V	123.289	43.91°C	115.21V
CL2	50.007A	1.001A	1.000A	1.000A	620.818	91.973%	0 RPM	<6.0 dB(A)	55.39°C	0.995
12.147V	5.036V	3.335V	5.007V	675.002	43.84°C	114.70V

Load regulation is very tight on all rails. Moreover, the PSU clearly handles tough environmental conditions easily, as our ambient temperature reached 45°C.

Efficiency-wise, the PSU doesn't satisfy 80 PLUS' requirements for a Titanium badge. Then again, we also test at a much higher ambient temperature than the 80 PLUS organization, so it's only natural for our results to reflect lower efficiency under such conditions.

MORE: Best Power Supplies
MORE: How We Test Power Supplies
MORE: All Power Supply Content