Be quiet! Straight Power 11 550W
Powerful yet silent, this 550 W ATX PSU delivers 80 Plus Gold efficiency with a single 135 mm fan and active PFC. Fully modular cables include dual PCI‑e, nine SATA, and a 20+4 pin motherboard connector for clean builds.
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Technextday
Be Quiet! Straight Power 11 550W Fully Modular PSU with FDF
Technextday
07-08-2025 00:13:14
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be quiet! Straight Power 11 power supply unit 550 W 20+4 pin ATX ATX Black
Back to the Office
23-12-2025 22:39:15
| Brand | Be Quiet |
| EAN | 4260052185766 |
| ASIN | B078X22YHM |
| Model | BN281 |
| MPN | T380694 |
| SKU | T380694 |
| 80 plus certificate | 80 PLUS Gold |
| Additional features | See Overview |
| Case colour | Black |
| Connectors | 1 x 4+4-pin CPU +12V (EPS) 1 x 4-pin FDD Power 3 x 4-pin Molex 2 x 6+2-pin PCIe 9 x SATA |
| Cooling | Fan |
| Depth | 160 mm |
| Dimensions | 150 x 86 x 160 (WxHxD) |
| Edition | Straight Power 11 |
| EPS 12V | Yes |
| Fans | 1 x 135mm |
| Frequency Range | 50 ~ 60 Hz |
| Height | 86 mm |
| Internal +12V Rails | Quad Rail |
| Maximum Combined Output +12V | 45.8 A |
| Maximum Efficiency at 230Vac | 93 % |
| Modular | Yes |
| Modularity | Full Modular |
| Motherboard Connector | 20+4-pin |
| Motherboard Power Connectors | 4 + 4-Pin |
| Noise | dB(A) at 20% load 11.15dB(A) at 50% load 11.8dB(A) at 100% load 32.1 |
| Package type | Retail |
| PCI-E Pin Type | 6+2-Pin |
| Power | 550 W |
| PSU Form Factor | ATX |
| Rail 1 +12V | 18 A |
| Refresh rate | 60Hz 2Ms Response Time |
| Safety | OCP / OVP / UVP / SCP / OTP / OPP |
| SATA Connectors | 9 |
| SLI/CrossFire | Yes |
| Voltage | 100 ~ 240 VAC |
| Warranty | 5 Years |
| Weight | 1.51 kg |
| Width | 150 mm |
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