be quiet! Straight Power 11 550W ATX Black power supply unit

World Class Quiet and Efficiency be quiet! Straight Power 11 550W raises the bar for systems that demand virtually inaudible operation without power quality compromises. This PSU is clearly the best choice for super silent systems. Virtually inaudible operation thanks to a SilentWings® 3 135mm fanBig funnel-shaped fan opening of the PSU case for high airflow intakeWire-free on the DC side inside the PSU for enhanced cooling and longevityFull cable management for maximum build flexibility80PLUS® Gold certification with an efficiency of up to 93%Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DCFour high-performance 12V-railsPowerful multi-GPU support with two PCI-Express connectorsJapanese 105°C-rated capacitors ensure stability and reliabilityPower signal stability unmatched in its classErP and Energy Star 6.1 ready5-year manufacturer’s warrantyProduct conception, design and quality control in Germany Virtually inaudible SilentWings® 3 135mm fanWire-free design inside the PSU80PLUS® Gold efficiency of up to 93%Convenient full cable management

Power
Total power	550 W
Peak power	600 W
AC input voltage	100 - 240
AC input frequency	50 - 60
Input current	8
Power factor	0.99
Power Factor Correction (PFC) type	Active
Combined power (+3.3V)	130 W
Combined power (+12V)	549.6 W
Combined power (+5V)	130 W
Combined power (-12V)	3.6 W
Combined power (+5Vsb)	15 W
Max output current (+3.3V)	24 A
Max output current (+12V1)	18 A
Max output current (+12V2)	18 A
Max output current (+12V4)	20 A
Max output current (+12V3)	20 A
Max output current (+5V)	24 A
Max output current (-12V)	0.3 A
Max output current (+5Vsb)	3 A
Power protection features	Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Hold time	18.9 ms
Efficiency	93%
Cooling
Fan diameter	13.5 cm
Number of fans	1 fan(s)
Ports & interfaces
Motherboard power cable length	60 cm
SATA power cable length	550 mm
PCI Express power cable length	60 cm
CPU power cable length	70 cm
Motherboard power connector	20+4 pin ATX
Number of SATA power connectors	9
Number of PATA power connectors	3
PCI Express power connectors (6+2 pin)	2
CPU power connector (4+4 pin)	Yes
Floppy disk drive connector	Yes
Cabling type	Modular
Performance
Power supply unit (PSU) form factor	ATX
Silent mode	Yes
Noise level (quiet mode, 50%)	9.46 dB
Noise level (silent mode, <30%)	9.02 dB
Noise level (full-load mode, 100%)	17.22 dB
Purpose	PC
ATX version	2.4
EPS version	2.92
On/off switch	Yes
Bearing technology	FDB
Design
Colour of product	Black
Illumination	No
Technical details
Cable management	Yes
Weight & dimensions
Width	150 mm
Depth	160 mm
Height	86 mm
Weight	1.51 kg
Certificates
80 PLUS certification	80 PLUS Gold
Energy Star certified	Yes
Certification	CE, FCC, TÃœV, cTUVus, RCM, BSMI, CU
RoHS compliance	Yes
Packaging data
Package depth	328 mm
Package width	248 mm
Package height	102 mm
Package weight	2.76 kg
Packaging content
Screws included	Yes
Cable ties included	Yes
Manual	Yes
Other features
Cable management	Yes

1. Non-Returnable Products: Once an order has been processed, items that are not classified as 3D memory products are non-returnable and cannot be cancelled.

2. Restocking Charges: A restocking fee of up to 25% may apply to eligible returns. The exact percentage depends on the product category.

3. Product Condition: All products are supplied in refurbished condition by default, unless explicitly stated as brand new retail stock prior to purchase.

4. Dispatch & Availability: Most orders are dispatched within 24 hours, subject to stock availability. For urgent or same-day dispatch requests, please contact our customer service team at (0)203-411-0694.

5. Manufacturer Part Numbers: Leading manufacturers such as Dell, HP, IBM, and Compaq may assign multiple identifiers to the same product, including Spare Part Numbers (Spare P/N#) or Field Replaceable Unit Numbers (FRU#). Items received may carry either designation and will be considered equivalent and fully compatible. For clarification, please contact our sales team.

6. Warranty Policy: All items are covered by a 30-day limited warranty, valid for replacement only in cases of DOA (Dead on Arrival), and must match the original part number. Certain storage devices may include an extended 90-day warranty—confirmation prior to purchase is recommended. Additional warranty options, including manufacturer or extended warranties, may be available upon request.

7. Drivers & Installation Media: Products are sold in bulk format and generally do not include installation media or drivers. If required, please confirm availability before placing your order.

8. Shipping Costs: Shipping charges are automatically calculated based on lighter items such as memory modules and hard drives (under 5 lbs). Heavier equipment, including servers, racks, or motherboards, may incur additional shipping costs. We recommend confirming shipping fees prior to order completion. In cases of discrepancies, our team will contact you to revise the charges accordingly.

9. Product Images: All product images are for illustrative purposes only. The actual item delivered may vary in appearance.

10. Packaging Disclaimer: Items may be shipped in bulk or non-retail packaging, particularly for large volume or consolidated orders.

11. End-of-Life (EOL) Products: Discontinued products may be substituted with equivalent parts that match the same FRU and functionality.

12. Refurbished Printers: Refurbished printers may not include toner cartridges, or may be supplied with partially used cartridges.

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Need Assistance?

If you require further clarification or have any concerns, please contact us prior to placing your order:
📧 support@selectechnology.co.uk
📞 (0)203-511-0854

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