be quiet! Pure Power 11 FM 1000 W Review

Name: be quiet! Pure Power 11 FM 1000 W
Brand: be quiet!
Price: 160 USD

crmaris

on Mar 18th, 2022,

in Power Supplies.

Manufacturer: be quiet!

Fan Noise »

Efficiency

Using the results we gathered so far, we plotted a chart showing the PSU's efficiency at low loads and loads ranging from 10 to 110 percent of the maximum-rated capacity.

Efficiency could be a bit higher with normal loads. It is pretty high with light loads, though.

10%–110% Load Testing

These tests reveal the PSU's load regulation and efficiency levels under high ambient temperatures and show how the fan-speed profile behaves under harsh operating conditions.

Load Regulation & Efficiency Testing Data - be quiet! Pure Power 11 FM 1000W
Test	12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
10%	6.490A	2.001A	2.008A	0.982A	100.009W	86.948%	707 RPM	11.1 dB(A)	41.01°C	0.837
10%	12.081V	4.999V	3.286V	5.094V	115.022W	86.948%	707 RPM	11.1 dB(A)	45.22°C	230.35V
20%	14.036A	3.003A	3.015A	1.181A	199.963W	91.562%	704 RPM	11 dB(A)	41.53°C	0.914
20%	12.045V	4.996V	3.284V	5.081V	218.388W	91.562%	704 RPM	11 dB(A)	45.94°C	230.34V
30%	21.938A	3.507A	3.52A	1.381A	300.004W	92.679%	703 RPM	10.9 dB(A)	42.6°C	0.935
30%	12.032V	4.991V	3.282V	5.069V	323.709W	92.679%	703 RPM	10.9 dB(A)	47.32°C	230.33V
40%	29.827A	4.009A	4.023A	1.582A	399.72W	92.953%	709 RPM	11.2 dB(A)	42.66°C	0.948
40%	12.020V	4.99V	3.281V	5.058V	430.022W	92.953%	709 RPM	11.2 dB(A)	47.7°C	230.32V
50%	37.389A	5.014A	5.03A	1.784A	499.461W	92.77%	760 RPM	13.4 dB(A)	43.3°C	0.956
50%	12.007V	4.988V	3.28V	5.046V	538.384W	92.77%	760 RPM	13.4 dB(A)	48.97°C	230.3V
60%	45.039A	6.02A	6.04A	1.987A	600.008W	92.465%	881 RPM	18.1 dB(A)	43.81°C	0.963
60%	11.994V	4.984V	3.279V	5.034V	648.893W	92.465%	881 RPM	18.1 dB(A)	49.84°C	230.29V
70%	52.640A	7.029A	7.051A	2.191A	699.727W	92.029%	1109 RPM	25.4 dB(A)	43.95°C	0.966
70%	11.980V	4.981V	3.276V	5.022V	760.34W	92.029%	1109 RPM	25.4 dB(A)	50.97°C	230.27V
80%	60.331A	8.003A	8.063A	2.295A	799.585W	91.454%	1642 RPM	37.4 dB(A)	44.32°C	0.969
80%	11.965V	4.977V	3.274V	5.012V	874.311W	91.454%	1642 RPM	37.4 dB(A)	52.45°C	230.26V
90%	68.374A	8.547A	8.557A	2.399A	899.564W	90.914%	1852 RPM	40.4 dB(A)	44.79°C	0.972
90%	11.950V	4.973V	3.272V	5.003V	989.468W	90.914%	1852 RPM	40.4 dB(A)	54.07°C	230.24V
100%	76.237A	9.056A	9.081A	3.011A	999.563W	90.231%	1853 RPM	40.4 dB(A)	45.21°C	0.975
100%	11.935V	4.969V	3.27V	4.983V	1107.793W	90.231%	1853 RPM	40.4 dB(A)	55.66°C	230.23V
110%	84.058A	10.065A	10.184A	3.016A	1100.081W	89.222%	1851 RPM	40.3 dB(A)	47.18°C	0.977
110%	11.918V	4.967V	3.269V	4.974V	1232.976W	89.222%	1851 RPM	40.3 dB(A)	57.96°C	230.22V
CL1	0.116A	14.464A	14.544A	0A	121.297W	83.658%	845 RPM	17 dB(A)	42.86°C	0.872
CL1	12.080V	4.992V	3.279V	5.093V	144.994W	83.658%	845 RPM	17 dB(A)	48.95°C	230.35V
CL2	0.115A	22.01A	0A	0A	111.394W	82.364%	750 RPM	13 dB(A)	43.16°C	0.862
CL2	12.087V	4.998V	3.283V	5.108V	135.247W	82.364%	750 RPM	13 dB(A)	50.21°C	230.34V
CL3	0.115A	0A	22.084A	0A	73.987W	76.386%	715 RPM	11.5 dB(A)	44.57°C	0.807
CL3	12.083V	5.001V	3.287V	5.094V	96.852W	76.386%	715 RPM	11.5 dB(A)	52.63°C	230.35V
CL4	83.714A	0A	0A	0A	1000.04W	90.717%	1860 RPM	40.6 dB(A)	45.69°C	0.975
CL4	11.946V	4.986V	3.283V	5.059V	1102.377W	90.717%	1860 RPM	40.6 dB(A)	55.84°C	230.23V

Despite the 40°C rating, the PSU doesn't have a problem delivering full power and more at 47°C. I didn't push it this hard for too long since that would be beyond this review's scope.

Light-Load Testing

We measure the PSU's efficiency at loads significantly lower than 10 percent of the maximum capacity—the lowest load the 80 PLUS standard measures. This is important for when a PC is idle with its power-saving features turned on.

Light Load Efficiency - be quite! Pure Power 11 FM 1000W
Test	12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
20W	1.230A	0.5A	0.501A	0.196A	20W	75.832%	693 RPM	10.5 dB(A)	37.41°C	0.45
20W	12.073V	5.005V	3.29V	5.11V	26.372W	75.832%	693 RPM	10.5 dB(A)	39.6°C	230.36V
40W	2.708A	0.7A	0.702A	0.294A	39.999W	82.542%	699 RPM	10.8 dB(A)	38.12°C	0.636
40W	12.069V	5.003V	3.289V	5.107V	48.46W	82.542%	699 RPM	10.8 dB(A)	40.87°C	230.35V
60W	4.186A	0.9A	0.903A	0.392A	59.997W	85.175%	697 RPM	10.7 dB(A)	38.84°C	0.738
60W	12.069V	5.001V	3.288V	5.105V	70.447W	85.175%	697 RPM	10.7 dB(A)	41.96°C	230.35V
80W	5.655A	1.1A	1.104A	0.49A	79.955W	85.279%	705 RPM	11 dB(A)	40.07°C	0.801
80W	12.082V	5.001V	3.287V	5.106V	93.755W	85.279%	705 RPM	11 dB(A)	43.93°C	230.35V

Efficiency is pretty high with light loads, while fan noise is low.

Super-Light Load Testing

We measure the PSU's efficiency with a 10 W load if its maximum power is 500 W or less in the following tests. If the PSU is stronger, we apply 2% of its maximum-rated-capacity load.

Super-Light Load Efficiency - be quiet! Pure Power 11 FM 1000W
12V	5V	3.3V	5VSB	Power (DC/AC)	Efficiency	Fan Speed	PSU Noise	Temp (In/Out)	PF/AC Volts
1.472A	0.255A	0.255A	0.053A	20.146W	74.828%	670 RPM	9.7 dB(A)	25.36°C	0.854
12.065V	5.004V	3.289V	5.111V	26.921W	74.828%	670 RPM	9.7 dB(A)	27.89°C	115.14V

The PSU easily breaks the 70% efficiency mark with 2% load.

5VSB Efficiency

5VSB Efficiency - be quiet! Pure Power 11 FM 1000W
Test #	5VSB	Power (DC/AC)	Efficiency	PF/AC Volts
1	0.1A	0.511W	69.251%	0.018
1	5.11V	0.738W	69.251%	230.38V
2	0.25A	1.277W	75.021%	0.042
2	5.107V	1.702W	75.021%	230.36V
3	0.55A	2.806W	79.42%	0.084
3	5.101V	3.533W	79.42%	230.36V
4	1A	5.093W	80.64%	0.143
4	5.092V	6.314W	80.64%	230.36V
5	1.5A	7.625W	80.968%	0.197
5	5.082V	9.417W	80.968%	230.36V
6	3A	15.162W	81.698%	0.301
6	5.053V	18.556W	81.698%	230.36V

The 5VSB rail is very efficient.

Power Consumption in Idle and Standby

Idle / Standby - be quiet! Pure Power 11 FM 1000W
Mode	12V	5V	3.3V	5VSB	Power (AC)	PF/AC Volts
Idle	12.069V	5.003V	3.288V	5.112V	3.306W	0.078
Idle	12.069V	5.003V	3.288V	5.112V	3.306W	230.36V
Standby					0W	0
Standby					0W	230.36V