be quiet! · Power Supply Unit

be quiet! System Power 11 450W price in United Kingdom

MPN BP009EUMPN BP009UKEAN 4260052191859EAN 4260052193105

Noise19.1 dB
Weight1.7 kg
ColourBlack
Total power450 W

Lowest price incl. delivery

£47.98

at Back to the OfficeIn stock

3 stores
Range £47.98 – £55.88
Save up to £7.90 vs. the dearest store
3 in stock
1 with free delivery
Checked 6 Oct 2026, 05:40 UTC

Go to Back to the Office See all 4 offers

Ad · prices and stock as last reported by the store; the store's checkout is what counts.

Full specifications and side-by-side comparison

Prices in United Kingdom

3 stores · prices in GBP · updated 6 Oct 2026, 05:40 UTC

Lowest price£47.98at Back to the Office · incl. shippingGo to Back to the Office

Price range across 4 offers

Save up to £7.90 (14%) by choosing the cheapest store

3 of 3 stores in stock
1 with free shipping
Checked 6 Oct 2026, 05:40 UTC

Back to the OfficeLowest pricebe quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Black In stock£4.99 shipping
£47.98£42.99 + £4.99 shipping
Go to store : Back to the Office (opens in a new tab)
Back to the Officebe quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Black In stock£4.99 shipping
£51.98£46.99 + £4.99 shipping+£4.00 (8%) vs lowest
Go to store : Back to the Office (opens in a new tab)
PCHUB.UKbe quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Blac In stockFree shipping
£55.88incl. free shipping+£7.90 (16%) vs lowest
Go to store : PCHUB.UK (opens in a new tab)
PcNova.co.ukbe quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Blac In stockShipping not stated
£55.88item price, shipping extra+£7.90 (16%) vs lowest
Go to store : PcNova.co.uk (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

Price history is being collected. After 14 days of prices we will show whether today's price is good.

Best price · Back to the Office£47.98

Go to store

Product details

Identification

Brand: be quiet!
Product: System Power 11 450W
Full name: be quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Black
Manufacturer part number: BP009EU, BP009UK
EAN / UPC: 4260052191859, 4260052193105
Category: Power Supply Unit

60 specifications from the manufacturer's data sheet

Power

Total power	450 W
AC input voltage	200 - 240 V
AC input frequency	50 Hz
Input current	4 A
Power factor	0.98
Number of +12V rail(s)	1
Combined power (+3.3V)	110 W
Combined power (+12V)	450 W
Combined power (+5V)	110 W
Combined power (-12V)	3.6 W
Combined power (+5Vsb)	15 W
Max output current (+3.3V)	20 A
Max output current (+12V1)	37.5 A
Max output current (+5V)	20 A
Max output current (-12V)	0.3 A
Max output current (+5Vsb)	3 A
Efficiency	89%
Hold time	16.86 ms
Power protection features	Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage

Ports & interfaces

Motherboard power connector	20+4 pin ATX
Number of SATA power connectors	5
Peripheral (Molex) power connectors (4-pin)	1
PCI Express power connectors (6+2 pin)	2
CPU power connector (4+4 pin)	Yes
PCI Express connector	Yes
Cabling type	Non-Modular

Performance

Purpose	PC
Power supply unit (PSU) form factor	ATX
80 PLUS certification	80 PLUS Bronze
ATX version	3.1
EPS version	2.92
Noise level	19.1 dB
Bearing technology	Rifle
Mean time between failures (MTBF)	100000 h

Design

Product colour	Black
Cooling type	Active
Fan diameter	12 cm
Number of fans	1 fan(s)
Fan speed	0 - 1800 RPM
Illumination	No
On/off switch	Yes

Certificates

Compliance certificates	CB, CE, RoHS, TÜV mark, UKCA, WEEE
Waste Electrical and Electronic Equipment (WEEE) compliance	Yes

Weight & dimensions

Width	150 mm
Depth	86 mm
Height	140 mm
Weight	1.7 kg

Packaging data

Package width	195 mm
Package depth	268 mm
Package height	97 mm
Package weight	2.1 kg
Package type	Box

Technical details

Sustainability certificates	ENERGY STAR, ErP

Logistics data

Products per shipping (inner) case	6 pc(s)
Shipping (inner) case gross weight	13.6 kg
Shipping (inner) case height	21.8 cm
Shipping (inner) case length	55.6 cm
Shipping (inner) case width	31.1 cm