be quiet! System Power 11 750W ATX 3.1 Power Supply

The be quiet! System Power 11 750W delivers reliable power for modern PC builds requiring ATX 3.1 compliance and PCIe 5.1 GPU support. This power supply combines proven reliability with quiet operation, making it suitable for value-oriented builders who require stable performance.

ATX 3.1 and PCIe 5.1 Compatibility

This PSU supports the latest ATX 3.1 standard and includes one PCIe 5.1 12V-2x6 connector capable of delivering 600W to high-end graphics cards. Additionally, it features two PCIe 6+2 pin connectors for legacy GPU support, ensuring compatibility with both current and previous generation graphics cards.

Quiet Operation and Cooling

Equipped with a temperature-controlled 120mm rifle bearing fan, the System Power 11 maintains low noise levels during operation. At 10% and 20% load, the fan operates at just 10.5 dB(A), increasing to 12.3 dB(A) at 50% load. The 4-pole fan motor can reach up to 2100 rpm when needed, providing adequate cooling while minimizing acoustic output.

Stable Power Delivery

The unit utilizes DC-to-DC technology for tight voltage regulation across all rails. With a strong single 12V rail capable of delivering 62.5A (750W combined), the PSU provides rock-solid stability for demanding components. The double forward topology with DC-DC conversion ensures consistent power delivery even under variable loads.

Efficiency and Power Consumption

Certified 80 PLUS Bronze, the System Power 11 achieves up to 90% efficiency at 50% load and maintains 86.6% efficiency at full load. The power supply draws less than 0.1W in standby mode, supporting modern standby requirements while minimizing idle power consumption. With a power factor greater than 0.98 at 100% load, it operates efficiently across its entire load range.

Comprehensive Protection Features

The PSU includes multiple protection mechanisms: Over Temperature Protection (OTP), Over Current Protection (OCP), Over Power Protection (OPP), Short Circuit Protection (SCP), Over Voltage Protection (OVP), Under Voltage Protection (UVP), and Surge & Inrush Protection (SIP). These safeguards protect both the power supply and connected components from electrical faults.

Cable Configuration

The System Power 11 includes 8 cables with a maximum length of 81cm to the motherboard. It features one 20+4-pin ATX motherboard connector, one P4+4 CPU connector, one P4 CPU connector, one 12V-2x6 cable, two PCIe 6+2-pin connectors, six SATA connectors, and one PATA connector. The P24 cable is sleeved, while P4+4, P4, PCIe, and drive cables are flat for easier cable management.

Build Quality and Warranty

Designed and quality controlled in Germany, the System Power 11 comes with a 5-year manufacturer's warranty. The unit measures 150mm x 86mm x 140mm and weighs 2.04kg. It operates reliably at temperatures up to 40°C with an average lifetime exceeding 100,000 hours at 25°C. The PSU is certified CE, CU, TÜV, and UKCA compliant, meeting Energy Star 8.0, ErP, WEEE, and RoHS standards.

SYSTEM POWER 11 750W

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 11 750 W

Continuous power (W)
750

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)
5

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% load65.5 Bronze
Efficiency (%) at 230V, 10% load 85.0 Bronze
Efficiency (%) at 230V, 20% load 89.1 Bronze
Efficiency (%) at 230V, 50% load 90.0 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)
2100

dB(A) at 10% load
10.5

dB(A) at 20% load
10.5

dB(A) at 50% load
12.3

dB(A) at 100% load
33.4

Output

Multi-rail operation (12V rails)
No

12V single rail operation
Yes

Overclocking key
No

+3.3V (A)
20

+5V (A)
20

+12V1 (A)
62.5

+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)
750

Max. combined power 12V-2x6 (W)
600

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

Hold-up time at 100% load (ms)
17.34

Hold-up time at 80% load (ms)
21.50

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)
81

No. of cables
8

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
6

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

TÜV
Yes

UKCA
Yes

IRAM
No

Environmental directives

Energy Star
8.0

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)
2.04

Color
Black

Logistics data and RRP

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

Gross weight, package (kg)
2.4

Pieces per packaging unit
6

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

Gross weight, shipping box (kg)
15.6

Service

Warranty (Years)
5

• Wattage: 750W
• Size/Version: ATX 3.1
• Modular: No
• SATA Connections: 5
• Certification: Bronze
• Colour: Black