SKU: 68553996326

be quiet! System Power 11 550W is ATX 3.1 compliant and PCIe 5.1 compatible, 5-year manufacturer's warranty

Sale price$49.49 Regular price$54.99
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

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Description

be quiet! System Power 11 550W is ATX 3.1 compliant and PCIe 5.1 compatible, 5-year manufacturer's warrantySYSTEM POWER 11 550W Proven Reliability, Quiet Operation System Power 11 is the ATX 3. 1 PSU for value oriented PC builders that do not want to pass on reliability and quietness. Highlights ATX 3. 1 PSU with support for PCIe 5. 1 GPUs and GPUs with 6+2 pin connectors Temperature controlled 120mm quality fan reduces system noise Rock solid stability with a strong 12V rail Tight voltage regulation using DC to DC technology Up to one PCIe 5. 1 12V 2x6

SYSTEM POWER 11 550W

Proven Reliability, Quiet Operation System Power 11 is the ATX 3.1 PSU for value-oriented PC builders that do not want to pass on reliability and quietness.

Highlights

ATX 3.1 PSU with support for PCIe 5.1 GPUs and GPUs with 6+2 pin connectors
Temperature-controlled 120mm quality fan reduces system noise
Rock-solid stability with a strong 12V-rail
Tight voltage regulation using DC-to-DC technology
Up to one PCIe 5.1 12V-2x6 600W and up to 3 PCIe 6-2 connectors for high-end GPUs
Dependable operation to support powerful GPUs
Stand-by drain of less than 0.15 watts
80 PLUS Bronze efficiency (up to 90.0 %)
5-year manufacturer’s warranty
Product conception, design and quality control in Germany

General

Model
System Power 11 550 W

Continuous power (W)
550

Peak power (W)
No

Form factor
Version 3.1

Form factor EPS 12V
Version 2.92

Topology
Double forward + DC-DC

Digitally controlled
No

Voltage (Vac)
200 - 240

Frequency (Hz)
50

Input current (A)
4

Power factor at 100% load
>0.98

Modern standby
Yes

Power consumption in standby (W)
<0.1

Average life time (h / 25°C)
>100,000

Operating temperature up to (°C)
40

Efficiency
80 PLUS certification
Efficiency (%) at 230V, 2% load64.4 Bronze
Efficiency (%) at 230V, 10% load 84.4 Bronze
Efficiency (%) at 230V, 20% load 88.6 Bronze
Efficiency (%) at 230V, 50% load 89.7 Bronze
Efficiency (%) at 230V, 100% load 86.6 Bronze

Fan and cooling technology

Cybenetics Noise Rating
No

Fan
Silence-optimized be quiet! fan

Fan size (mm)
120

Bearing technology
Rifle

Motor technology
4-pole fan motor

Max. fan speed (rpm)
1800

dB(A) at 10% load
10.4

dB(A) at 20% load
10.8

dB(A) at 50% load
11.0

dB(A) at 100% load
24.2

Output

Multi-rail operation (12V rails)
No

12V single rail operation
Yes

Overclocking key
No

+3.3V (A)
20

+5V (A)
20

+12V1 (A)
45.83

+12V2 (A)
no

+12V3 (A)
No

+12V4 (A)
No

+12V5 (A)
No

+12V6 (A)
No

-12V (A)
0.3

+5Vsb (A)
3

Max. combined power 12V (W)
550

Max. combined power 12V-2x6 (W)
300

Max. combined power 3.3V + 5V (W)
120

Hold-up time at 100% load (ms)
16.86

Hold-up time at 80% load (ms)
20.92

Power good signal (ms)
100 - 150

Cables and connectors

Modular cables
No

Sleeved cables
P24

Flat cables
P4+4, P4, PCIe, drives

Maximum cable length (cm)
55

Cable length to motherboard (cm)
79

No. of cables
7

ATX-Motherboard (20+4-pin)
1

P4+4 (CPU)
1

P8 (CPU)
No

P4 (CPU)
1

12V-2x6 cables
1

PCI-e 6+2-pin (GPU)
2

PCI-e 6-pin (GPU)
No

SATA
5

PATA
1

FDD (Floppy)
No

Protection

OTP (over temperature protection)
Yes

OCP (over current protection)
Yes

OPP (over power protection)
Yes

SCP (short circuit protection)
yes

OVP (over Voltage protection)
Yes

UVP (under Voltage protection)
Yes

SIP (Surge & Inrush protection)
Yes

Safety certification

BSMI
No

CB
No

CCC
No

CE
Yes

cRUus
No

cTUVus
No

CU
Yes

FCC
No

RCM
No

TUV
Yes

UKCA
Yes

IRAM
No

Environmental directives

ErP
Yes

WEEE
Yes

RoHS
Yes

Triman
No

Scope of delivery

Thumb screws
No

Screws
Yes

Cable ties
Yes

Velcro cable ties
No

User manual languages
No

OCK slot bracket with switch / OCK jumper
No

SFX-to-ATX adapter bracket
No

Casing

Dimensions without cable (L x W x H), (mm)
86 x 150 x 140

Weight (kg)
1.92

Color
Black

Logistics data and RRP

Dimensions, package (L x W x H), (mm)
268 x 195 x 97

Gross weight, package (kg)
2.3

Pieces per packaging unit
6

Dimensions, shipping box (L x W x H), (mm)
556 x 311 x 218

Gross weight, shipping box (kg)
14.9

Service

Warranty (Years)
5


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68553996326

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Vince
Boise, US
★★★★★ 3
Stain on collar
I was disappointed to see this stain on the collar. The fit is great & feels heavy & well made. Not sure why it would be packaged with a stain on it & since it’s white it’s even more noticeable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 31, 2022
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Verified Purchase
Supranu
Natrona Heights, US
★★★★★ 5
Material and stitching so it doesn't look cheap.
Good quality for the price. Not wool. It meets my needs. I don't wear sweaters that often so buying a pricey one makes no sense. These look great when they are new.
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Reviewed in the United States on December 15, 2025
T
Verified Purchase
Timothy Listenbee
West Palm Beach, US
★★★★★ 5
Nice product
Size: Large, Color: Black
Great fit and great material. Warm as well
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Reviewed in the United States on November 9, 2025
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Verified Purchase
Patrice Kimmerle
Battle Creek, US
★★★★★ 5
Good quality and fit. Lightweight sweater.
Great lightweight sweater. Quality fabric and good fit.
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Reviewed in the United States on December 29, 2025
M
Verified Purchase
MJ
Battle Creek, US
★★★★★ 4
Boyfriend liked it, however it has a weird fit
I got this for my boyfriend as he is a fan of this brand's clothes. I got him small and I am glad I did. Although it looks fantastic on him because he is him, the sweater is strangely long and has a weird tough material to it. It is not exactly soft to the touch, and it has a weird stretch. It doesn't feel like other COOFANDY brand turtlenecks he owns, so I was surprised at how stiff the material was compared to those. The color is also a bit more orange in person.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 23, 2023

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