be quiet! · Power Supply Unit

be quiet! Straight Power 11 price in United Kingdom

MPN BN281MPN BN618MPN BN620EAN 4260052185773EAN 4260052185759

Noise8.4 dB
Weight1.78 kg
ColourBlack
Total power750 W

Lowest price incl. delivery

£95.99

at Back to the OfficeFree deliveryIn stock

1 store
Range £95.99 – £179.99
Save up to £84.00 vs. the dearest store
1 in stock
1 with free delivery
Checked 6 Oct 2026, 05:40 UTC

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Full specifications and side-by-side comparison

Prices in United Kingdom

1 store · prices in GBP · updated 6 Oct 2026, 05:40 UTC

Lowest price£95.99at Back to the Office · free shippingGo to Back to the Office

Price range across 6 offers

Save up to £84.00 (47%) by choosing the cheapest store

1 of 1 stores in stock
1 with free shipping
Checked 6 Oct 2026, 05:40 UTC

Back to the OfficeLowest pricebe quiet! Straight Power 11 power supply unit 450 W 20+4 pin ATX ATX Black In stockFree shipping
£95.99incl. free shipping
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! Straight Power 11 power supply unit 550 W 20+4 pin ATX ATX Black In stockFree shipping
£98.99incl. free shipping+£3.00 (3%) vs lowest
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! Straight Power 11 power supply unit 650 W 20+4 pin ATX ATX Black In stockFree shipping
£113.99incl. free shipping+£18.00 (19%) vs lowest
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! Straight Power 11 power supply unit 750 W 20+4 pin ATX ATX Black In stockFree shipping
£130.99incl. free shipping+£35.00 (36%) vs lowest
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! Straight Power 11 power supply unit 850 W 20+4 pin ATX ATX Black In stockFree shipping
£143.99incl. free shipping+£48.00 (50%) vs lowest
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! Straight Power 11 power supply unit 1000 W 20+4 pin ATX ATX Black In stockFree shipping
£179.99incl. free shipping+£84.00 (88%) vs lowest
Go to store : Back to the Office (opens in a new tab)

Ad: we may earn a commission when you buy through these links; it never changes the order, which is by total price only. Prices and stock are shown as each store states them, as of 6 Oct 2026, 05:40 UTC, and can change at any time. Taxes are included only where the store includes them.

Price history in United Kingdom

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Best price · Back to the Office£95.99

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Product details

Identification

Brand: be quiet!
Product: Straight Power 11
Full name: be quiet! Straight Power 11 power supply unit 750 W 20+4 pin ATX ATX Black
Manufacturer part number: BN281, BN618, BN620, BN619, BN645, BN283, BN285, BN284, BN282, BN280
EAN / UPC: 4260052185773, 4260052185759, 4260052185766, 4260052185780, 4260052185803, 4260052185797
Category: Power Supply Unit

67 specifications from the manufacturer's data sheet

Power

Total power	750 W
Peak power	820 W
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Input current	10 A
Power factor	0.99
Power Factor Correction (PFC) type	Active
Combined power (+3.3V)	150 W
Combined power (+12V)	750 W
Combined power (+5V)	150 W
Combined power (-12V)	6 W
Combined power (+5Vsb)	15 W
Max output current (+3.3V)	25 A
Max output current (+12V1)	20 A
Max output current (+12V2)	20 A
Max output current (+12V3)	24 A
Max output current (+12V4)	24 A
Max output current (+5V)	25 A
Max output current (-12V)	0.5 A
Max output current (+5Vsb)	3 A
Efficiency	93%
Hold time	19.6 ms
Power protection features	Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage

Ports & interfaces

Motherboard power connector	20+4 pin ATX
Motherboard power cable length	60 cm
Number of PATA power connectors	4
Number of SATA power connectors	11
SATA power cable length	550 mm
PCI Express power connectors (6+2 pin)	4
PCI Express power cable length	60 cm
CPU power connector (4+4 pin)	Yes
CPU power cable length	70 cm
Floppy disk drive connector	Yes
PCI Express connector	Yes
Cabling type	Fully-Modular

Performance

Purpose	PC
Power supply unit (PSU) form factor	ATX
80 PLUS certification	80 PLUS Gold
ATX version	2.4
EPS version	2.92
Silent mode	Yes
Bearing technology	FDB

Design

Product colour	Black
Cooling type	Active
Fan diameter	13.5 cm
Number of fans	1 fan(s)
Illumination	No
On/off switch	Yes

Certificates

Compliance certificates	RoHS
Certification	CE, FCC, TÜV, cTUVus, RCM, BSMI, CU

Weight & dimensions

Width	150 mm
Depth	170 mm
Height	86 mm
Weight	1.78 kg

Packaging data

Manual	Yes
Package width	248 mm
Package depth	328 mm
Package height	102 mm
Package weight	3.34 kg

Technical details

Sustainability certificates	ENERGY STAR

Logistics data

Harmonized System (HS) code	84733020

Other features

Screws included	Yes
Cable ties included	Yes
Noise level (silent mode, <30%)	8.4 dB
Noise level (quiet mode, 50%)	9.01 dB
Noise level (full-load mode, 100%)	21.23 dB
Cable management	Yes