be quiet! Straight Power 11 Platinum 550W raises the bar for systems that demand virtually inaudible operation and outstanding efficiency.
Straight Power 11 Platinum 550W is certified with 80 PLUS Platinum efficiency, reaching up to 93.8%. This provides lots of benefits for your high-end system, including less power consumption and an overall cooler and quieter operation. The standby drain is below 0.1 watts.
The high-end Silent Wings 3 fan delivers best-of-class airflow yet produces very little noise. This is thanks to its unique, optimized fan blade design along with an advanced fluid-dynamic bearing and 6-pole fan motor that largely eliminates operational noise, has a super-long life and minimal power consumption.
The fan inlet of the Straight Power 11 Platinum 550W is funnel-shaped. It causes an increased throughput of air which benefits to a higher cooling performance.
An absolute innovation: The Straight Power 11 Platinum 550W is wire-free on the DC side inside the PSU body. This results in improved cooling airflow and less signal disturbance, simply because of a lack of wiring, and ultimately pushes the lifetimes of the components to a maximum.
Thanks to the modular cables, all cables that serve no purpose in the system are left out. For this reason, systems always appear very tidy. At the same time installation is performed much more conveniently. A smoother airflow results from the uncluttered layout of the system, which means lower noise and temperatures prevail inside the case.
Experience the most technologically advanced power supply be quiet! has ever built! Using an advanced full bridge, LLC and Synchronous Rectifier (SR) technology it provides unmatched signal stability and unbeatable power efficiency. The DC-to-DC conversion for tight voltage regulation, even under heavy cross-loading conditions ensures reliable operation for the next generation of processors and graphics cards.
Only the best components are used in Straight Power 11 Platinum 550W. That is why we have built only high-quality Japanese capacitors into the PSU chassis. They are rated to 105°C, ensuring stability, reliability and a long operating life.
|Model||Straight Power 11 Platinum 550W|
|Continuous power (W)||550|
|Peak power (W)||600|
|Form factor||Version 2.51|
|Form factor EPS 12V||-|
|Modular Cable management||✓|
|Topology||Full bridge + LLC + SR + DC/DC|
|Wire-free design (DC-side)||✓|
|Voltage (Vac)||100 - 240|
|Frequency (Hz)||50 - 60|
|Input current (A)||8 / 4|
|Power factor at 100% load||>0.99|
|Compliant to Intel C6/C7||✓|
|Power consumption in standby (W)||0.16|
|Average life time (h / 25°C)||100,000|
|Operating temperature up to (°C)||40|
|12V rails (multi-rail operation)||4|
|12V single rail operation||-|
|Max. combined power 12V (W)||549.6|
|Max. combined power 3.3V + 5V (W)||110|
|Hold-up time at 100% load (ms)||17|
|Power good signal||100 - 150ms|
|Fan type||Silent Wings 3|
|Motor technology||6-pole fan motor|
|Fan size (mm)||135|
|Max. fan speed (rpm), temperature-dependent||1200|
|Temperature control for case fans||-|
|dB(A) at 20% load||9|
|dB(A) at 50% load||9.6|
|dB(A) at 100% load||14.9|
|OCP (over current protection)||✓|
|OVP (over Voltage protection)||✓|
|UVP (under Voltage protection)||✓|
|SCP (short circuit protection)||✓|
|OTP (over temperature protection)||✓|
|OPP (over power protection)||✓|
|SIP (Surge & Inrush Protection)||✓|
|80 PLUS certification||Platinum|
|Efficiency (%) at 230V, 20% load||92|
|Efficiency (%) at 230V, 50% load||93.8|
|Efficiency (%) at 230V, 100% load||92.8|
|Nvidia® SLI (RTX 3090) ready||-|
|Sleeved cables||Sleeved cables|
|Cable length to mainboard (cm)||60|
|Cable length to first connector (cm)||55|
|Maximum cable length (cm)||115|
|All-in-one cable (SATA/PATA/FDD)||-|
|No. of cables||8|
|PCI-e 6-pin (GPU)||-|
|PCI-e 6+2-pin (GPU)||2|
|External fan connectors||-|
|Dimensions without cable (L x W x D), (mm)||160 x 150 x 86|
|Velcro cable ties||-|
|Box/Bag for PSU/Cables||-|
|User manual languages||DE, EN, ES, FR, PL, RU|
|OCK slot bracket with switch / OCK jumper||-|
|SFX-to-ATX adapter bracket||-|
|Express replacement service in first year||DE, FR|
|International hotline / free of charge||✓ / DE, FR|
|Dimensions, package (L x W x H), (mm)||328 x 248 x 102|
|Gross weight, package (kg)||2.84|
|Pieces per packaging unit||6|
|Dimensions, shipping box (L x W x H), (mm)||651 x 282 x 346|
|Gross weight, shipping box (kg)||20.6|
You are already using a be quiet! power supply and want to upgrade your system with a new STRAIGHT POWER 11 | 550W Platinum ? Check here which cables are compatible and don't need to be replaced.