BeQuiet BN339 is a highly efficient power supply unit designed to provide stable and reliable power to high-performance computers. As part of the Straight Power 12 series, it delivers a maximum output of 1200 watts with an 80 PLUS Platinum efficiency rating, ensuring minimal wasted power and optimised energy usage. This power supply unit features advanced topology and premium-quality components, which reduce ripple noise and support virtually inaudible operation ideal for both gaming and professional workstation environments. Its fully modular design facilitates clean and efficient cable management, thereby enhancing airflow and cooling within the PC case. This PSU is suitable for engineering applications that require robust and continuous power output, such as CAD systems or data analysis workstations, supporting consistent, high-demand processing.
| Power Rating |
751 W - |
| +12 V/DC |
100A |
| +5V / DC |
3A |
| -12V / DC |
0.5A |
| 3.3V DC |
25A |
| 5 V DC |
25A |
| 6-pin PCIe |
4 |
| 80 PLUS certification |
80 PLUS Platinum |
| AC input frequency |
50/60 Hz |
| AC input voltage |
110 - 240 V |
| ATX version |
3.0 |
| Bearing technology |
FDB |
| Cable tie(s) included |
Yes |
| Cables included |
CPU, SATA |
| Cabling type |
Fully-Modular |
| Colour |
Black |
| Combined power (+12V) |
1200 W |
| Combined power (+3.3V) |
150 W |
| Combined power (+5V) |
150 W |
| Compliance certificates |
RoHS, Federal Communications Commission (FCC), UKCA, WEEE, CE |
| Cooling |
Active |
| Cooling type |
Active |
| CPU power cable length |
70cm |
| Depth |
180mm |
| Design Height |
86mm |
| Dimensions |
(W x H x D) 150 x 86 x 180 mm |
| Efficiency |
92.4% |
| EPS power connector (4+4 pin) |
Yes |
| EPS power connector (8-pin) |
Yes |
| EPS version |
2.92 |
| Fan diameter |
13.5 cm |
| Fan speed |
0 - 2600 RPM |
| Height |
86mm |
| Hold time |
23 ms |
| Input Current |
15/7.5 A |
| Max output current (+12V1) |
100 A |
| Max output current (+3.3V) |
25 A |
| Max output current (+5V) |
25 A |
| Max output current (+5Vsb) |
3 A |
| Max output current (-12V) |
0.5 A |
| Mean time between failures (MTBF) |
100000 h |
| Motherboard power cable length |
60cm |
| Motherboard power connector |
20+4 pin ATX |
| Noise Level |
32.2 dB |
| Number of fans |
1 fan(s) |
| Number of PATA power connectors |
2 |
| Number of SATA power connectors |
9 |
| On/off switch |
Yes |
| Operating temperature (T-T) |
0 - 40 °C |
| Package depth |
328mm |
| Package height |
102mm |
| Package type |
Box |
| Package weight |
3.89 kg |
| Package width |
248mm |
| PCI Express power cable length |
60cm |
| PCI Express power connectors (16-pin) |
2 |
| PCI Express power connectors (6+2 pin) |
4 |
| Peak power |
1270 W |
| Peripheral (Molex) power cable length |
1000,850 mm |
| Power Factor |
0.99 |
| Power protection features |
Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage |
| Power supply |
110 - 240V |
| Power supply unit (PSU) form factor |
ATX |
| Product colour |
Black |
| Product Type |
PC power supply unit |
| Products per shipping (inner) case |
4 pc(s) |
| PSU output power |
1200W |
| Purpose |
PC |
| SATA power cable length |
550,700,850,1000 mm |
| Shipping (inner) case height |
34.6cm |
| Shipping (inner) case length |
44.7cm |
| Shipping (inner) case net weight |
17 kg |
| Shipping (inner) case width |
28.2cm |
| Supported motherboard form factors |
ATX, micro ATX, Mini-ATX |
| Sustainability certificates |
Triman, ENERGY STAR, ErP |
| Sustainability compliance |
Yes |
| Total power |
1200 W |
| Type |
PC power supply unit |
| Warranty period |
10 year(s) |
| Weight |
2.04kg |
| Width |
150mm |
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