be quiet! System Power B8 300W (BN256)

Be Quiet POWER B8
(BN256)

Proven Reliability and Good Efficiency

It’s not easy being a system integrator in today’s competitive PC computing environment. Your customers demand more, while you want the best price-for-performance available. That is why be quiet! System Power B8 is the ideal choice for you. Especially designed with the price-conscious PC builders in mind, its combination of power, quietness for its class and efficiency is beyond ordinary, and is letting you build cost-effective and reliable systems.

300W of continuous power and two 12V-rails ensure rock-solid voltage stability
80PLUS® certification and up to 87% power conversion efficiency
Quiet operation for its class achieved by an array of careful optimizations, including the use of a quiet 120mm fan
Production-optimized thanks to convenient bulk packaging
Product conception, design and quality control in Germany

Applications

Office applications
Gaming systems
Low-budget and quiet PC builds
Feature Details

Engineering

Full suite of top safety protections defends against over-currents, over- and under-voltages, short circuits, overheating and overloads, thus safeguarding your valuable components
Two independent 12V-rails improve power signal stability
Compatible with 230V AC power mains
Energy Efficiency

80PLUS® certification means operating efficiency for its class of up to 87%
High efficiency means cost savings, reduced heat wastage and overall quieter operation
Standby drain of less than 0.14 watts
Meets Energy Star 6.0 guidelines
Fulfills ErP 2014 guidelines
Zero Load design supports Intel®’s Deep Power Down C6/C7 mode
Quiet Operation

High-quality 120mm fan is thermally controlled to strike the best balance between proper cooling and quietness
Efficient PSU design produces low operating temperatures

General

Model System Power B8 | 300W
General Data

Continuous power (W)300
Peak power (W)-
Form factor ATX 12V Version 2.4
Form factor EPS 12V-
Modular cable management-
Topology-
Voltage (Vac)200 - 240
Frequency (Hz)50
Input current (A)2.5
PFC active
Power factor at 100% load>0.98
Compliant to Intel C6/C7✓
Compliant to Intel C6 mode✓
Power consumption in standby (W)0.14
Average life time (h / 25°C)100.000
Operating temperature up to (°C)40

Output

12V rails (multi-rail operation)2
12V single rail operation-
Overclocking key-
+3.3V (A)17
+5V (A)15
+12V1 (A)18
+12V2 (A)14
+12V3 (A)-
+12V4 (A)-
+12V5 (A)-
+12V6 (A)-
-12V (A)0.3
+5Vsb (A)2.5
Max. combined power 12V (W)276
Max. combined power 3.3V + 5V (W)103
Hold-up time (ms @ 100%)18ms (@ 75% load)

Fan / Cooling technology

Fan type high-quality fan
+Silent Wings-
Motor technology 4-pole fan motor
Bearing technology Sleeve
Fan size (mm)120
Max. fan speed (rpm), temperature-dependent 1,650
Temperature control for case fans-
dB(A) at 20% load11.6
dB(A) at 50% load12.1
dB(A) at 100% load23.1

Protection

OCP (over current protection)✓
OVP (over voltage protection)✓
UVP (under voltage protection)✓
SCP (short circuit protection)✓
OTP (over temperature protection)✓
OPP (over power protection)✓

Safety certification

CE✓
CB✓
TÜV✓
Nemko (N)-
Semko (S)-
Fimko (FI)-
Demko (D)-
FCC-
cRUus-
cTUVus-
RCM (Australia)✓
BSMI-
CU (Russia)✓

Eco / Efficiency

80 PLUS certification 230V EU internal
Efficiency (%) at 230V, 20% load84
Efficiency (%) at 230V, 50% load87
Efficiency (%) at 230V, 100% load85
Environmental directives

ENERGY STAR6.0
ErP✓
WEEE✓
RoHS✓
Cablemanagement / Connectors

Modular cable management-
Sleeved cables-
Flat Cables-
Cable length to mainboard (cm)45
Cable length to first connector (cm)40
Maximum cable length (cm)85
All-in-one cable (SATA/PATA/FDD)-
No. of cables4
ATX-Mainboard (20+4 pin)1 (24-pin)
P8 (CPU)-
P4+4 (CPU)-
P4 (CPU)1
PCI-E 6 pin (GPU)-
PCI-E 6+2 pin (GPU)-
PATA 4 pin2
SATA 15-pin (HDD, Drives)4
FDD (Floppy)-
Mainboard Connector (PATA 4 pin)-
External fan connectors-

GPU compatibility

Multi-GPU ready-
NVIDIA SLI readyTM certified-
AMD CrossFireX certified-

Casing

Dimensions without cable (L x W x D), (mm)140 x 150 x 86
Weight incl. fixe