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be quiet! T380699 System Power 9 500W, 80 PLUS Bronze, power supply, Black

4.6 4.6 out of 5 stars 7,183 ratings

£76.47
System Power 9 500W
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Purchase options and add-ons

Model name Power Supply
Brand be quiet!
Compatible devices Personal Computer
Connector type PCI Express
Output wattage 500
Form factor ATX
Wattage 500 watts
Cooling method Air
Item dimensions L x W x H 14 x 15 x 8.6 centimetres
Item weight 1.8 Kilograms

About this item

  • That be quiet! System Power 9 500W is the perfect choice for building powerful and cost-effective systems at a reasonable price
  • Two powerful 12V lines - stable running performance thanks to DC/DC technology
  • Standby consumption of less than 0.15 watts - 80PLUS bronze efficiency of up to 89%
  • Supports all latest Intel and AMD processors
  • Product concept, design and quality control in Germany
  • Compatible with power supply and mother board specifications, such as Intel ATX12V Power Supply Design Guide version 2.51 (and lower compatible with V2.4/ V2.31 /V2.3/V 2.01/V 2.0, ATX System Design Guide version 2.2 and version 2.1, BTX version 1.0a, EPS 12 V V2.92 (600—700 W), Intel C6/C7, Energy Star 6.1, ERP enabled.
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be quiet! T380699 System Power 9 500W, 80 PLUS Bronze, power supply, Black
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Price£76.47£48.45-13% £57.93
Was:£66.95
£84.95£72.50-12% £87.10
Was:£98.95
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From the manufacturer

Bequiet System Power 9 BN245

Proven Reliability and Good Efficiency

Very high operating efficiency

Bequiet System Power 9 BN245

Bequiet System Power 9 BN245

Bequiet System Power 9 BN245

Very Quiet Operation

System Power 9 is equipped with a temperature-controlled 120mm fan. It provides you with the low noise operation that be quiet! is famous for, built into an entry-level system.

80 PLUS Bronze Certification

The 80 PLUS Bronze certification is convincing evidence of this PSU’s efficient and power saving operation. It is a remarkable achievement for this class of PSU, realising an efficiency rating of up to 89%.

High Performance for Your System

System Power 9 provides stable and dependable power for CPU and GPU. It is equipped with two independent 12V-rails and supports several graphics cards with four (600 and 700W) or two (400 and 500W) PCI express connectors for multi-GPU systems.

A complete range of safety features

Bequiet System Power 9 BN245

Bequiet System Power 9 BN245

Bequiet System Power 9 BN245

Innovative DC-to-DC Conversion

The PSU is equipped with DC-to-DC conversion for tight voltage regulation, even under heavy cross-loading conditions. This ensures reliable operation and makes it ready for the next generation of processors and graphics cards.

High-Quality Cable Design

System Power 9 comes with full high-quality black sleeved cables that add a touch of class to any PC system.

Comprehensive Protection

Top component protection with a full suite of safety functions, including OCP, OVP, OPP, OTP UVP and SCP, which provide the ultimate in secure operation.

General Data

Model System Power 9 500W
Continuous power (W) 500
Peak power (W) -
Form factor ATX 12V Version 2.4
Form factor EPS 12V -
Modular Cable management -
Topology DC-DC
Wire-free design (DC-side) -
Voltage (Vac) 200 - 240
Frequency (Hz) 50
Input current (A) 4
PFC active
Power factor at 100% load >0.95
Compliant to Intel C6/C7 Yes
Power consumption standby (W) <0.15
Operating temperature (°C) Up to 40

Product guides and documents

Customer reviews

4.6 out of 5 stars
7,183 global ratings

Customers say

Customers like the quietness, quality, and functionality of the system power device. They mention it's very quiet, works like new, and the cables and connectors all work as expected. Some appreciate the value for money, power supply, and design. However, some customers have mixed opinions on the plug.

AI-generated from the text of customer reviews

49 customers mention ‘Quietness’44 positive5 negative

Customers like the quietness of the system power device. They mention it's very quiet, the loudest component is their GPU, and there is no coil whine.

"...Having said that I'm extremely happy with my purchase. It is VERY quiet...." Read more

"...It's as quiet as the Corsair, and capable to power an i7 6-core + GTX1070Ti when stress testing both simultaneously...." Read more

"...Fantastic quiet performance." Read more

"...The psu does a good job and its quiet while doing it.. But i give it 4 stars because from time to time..." Read more

26 customers mention ‘Quality’26 positive0 negative

Customers are satisfied with the quality of the power supply. They mention it's quiet, capable, and has a dual rail.

"...Summary - buy it - quiet, capable, and cheap." Read more

"Great PSU, very quite. One problem was that the 2x4 way 12 volt atx power plug did not have the correct plug profile on one of the plugs...." Read more

"...The PC is now suitably powered and most importantly in this case, nice and quiet too. What's not to like?" Read more

"...are plenty of options and aren't red and yellow, so you know it's decent quality." Read more

22 customers mention ‘Functionality’18 positive4 negative

Customers like the functionality of the product. They mention it works like new, shows no problems, and does a good job. The cables and connectors all work as expected and seem to be quite high-quality.

"...above the noise of my case and CPU fans, and I have had no problems one week into my build...." Read more

"...It fitted into my case well and thus far no issues (fingers crossed) and it is as quiet as it says on the box...." Read more

"...review after around a year of usage the psu didn't blow and it works like new, would recommend)..." Read more

"...edit - 2024 oct, Years later and the psu is running brilliant, spent thousands of hours already and still works perfectly , would buy again" Read more

19 customers mention ‘Build quality’19 positive0 negative

Customers are satisfied with the build quality of the product. They mention it's well-made, reliable, and solid. Customers also appreciate the reinforced wires and long braided cables.

"...The cables and connectors all worked as expected and seemed to be quite high quality...." Read more

"Power supply - 100% like in describe. Solid and reliable but order from Bristol - send to me from UK and I got EU cable ?????????" Read more

"...It's quiet and well built...." Read more

"...The wires are reinforced, there are plenty of options and aren't red and yellow, so you know it's decent quality." Read more

19 customers mention ‘Value for money’19 positive0 negative

Customers appreciate the value for money of the product. They mention it's a solid budget PSU and a good buy.

"...This was the only reasonably priced PSU of any sort that I could get, so it wasn't exactly my first choice...." Read more

"Good price for the power supply, but it only comes with an EU power cord, not a UK power cord...." Read more

"...A good value of money." Read more

"...This PSU is as good as it gets for that price point." Read more

16 customers mention ‘Power supply’16 positive0 negative

Customers are satisfied with the power supply. They mention it's amazing, has plenty of power, and is quiet. Some say it can power an i7 6-core + GTX1070Ti when under stress.

"...It's as quiet as the Corsair, and capable to power an i7 6-core + GTX1070Ti when stress testing both simultaneously...." Read more

"...Well, I am happy I bought this semi-modular power supply. Most reviews said modular and semi-modular are small cosmetic enhancements...." Read more

"Good quality power supply is to install very quick" Read more

"...This is only running a NAS box so the power demands are low, no graphics cards involved...." Read more

6 customers mention ‘Design’6 positive0 negative

Customers like the sleek design of the product. They also appreciate the black sleeves on the cables and a blacked-out look.

"...The black sleeves on the cables are fantastic and I haven't even had to bother with cable ties...." Read more

"...this power supply is so quiet, easy to assemble, has a discreet and clean design, and fits perfectly...." Read more

"...power supply that's very quit and the cables are good quality and sleek...." Read more

"...Black sleeved cables and a blacked out look make this PSU look the part...." Read more

27 customers mention ‘Plug’13 positive14 negative

Customers have mixed opinions about the plug of the system power device. Some mention it includes both UK and EU power cords in the box. Others say it only comes with an EU power cord and 2 pin plug.

"nothing to dislike, was easy to install and connect up with enough connectors, would buy another from this brand definately..." Read more

"...One problem was that the 2x4 way 12 volt atx power plug did not have the correct plug profile on one of the plugs...." Read more

"...It is installed in the PC, is working and has a good selection of cables, but but doesn't look right hence 3 stars" Read more

"Good price for the power supply, but it only comes with an EU power cord, not a UK power cord...." Read more

Good PSU but a tad overpriced for what it is
5 out of 5 stars
Good PSU but a tad overpriced for what it is
Well, it all works fine thus far but I will hold off on the full review until I have used my new system for a bit as all the components for the new build will be tied together. Delivery was spot on as it usually is with Amazon. There are rare occasions but as I have said they are rare.Speaking of rare Amazon tracking showed the package on its way then amazon sent a message saying that it would be delayed and it didn't arrive then I would get a refund but then it arrived the next day(strange).It fitted into my case well and thus far no issues (fingers crossed) and it is as quiet as it says on the box.I will update as time goes by and let you all know how it performs.The cost of PC parts is nothing less than extortion but the resellers have us where they want us in these times of lockdown I guess. c'est la vie.Do you know what else would be strange?A bird with three heads and seven wings that could sing soprano.***********UPDATE 12/02/2022*************This is the third one I have purchased (this one from Fuzion) and I must say that Fuzion is amazing with delivery well ahead of schedule and well packaged. You could see that they care about customer service and this shows in the way they despatched the product (well-done guys and girls). The two that I have been working well in other builds but if anything happens then I will update again.
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Top reviews from United Kingdom

Reviewed in the United Kingdom on 8 May 2020
Style Name: System Power 9 600WVerified Purchase
The recommended PSU rating for my build (according to PC Parts) was 350 watts, which seemed very low to me. I thought I might build in a little extra headroom for future upgrades, so I looked for a 500 watt model, edging towards Corsair. But thanks to the (at the time of writing) pandemic lockdown, it seemed like everyone else had the same idea! This was the only reasonably priced PSU of any sort that I could get, so it wasn't exactly my first choice.

Having said that I'm extremely happy with my purchase. It is VERY quiet. I cannot hear it above the noise of my case and CPU fans, and I have had no problems one week into my build.

Being a non-modular design, you may be concerned about cable management. I'm not, and I leave all my cables free inside the case, but I don't think you'd have any problems if that's your thing. The cables and connectors all worked as expected and seemed to be quite high quality.

So, not what I was initially looking for, but turned out to be a great purchase.
10 people found this helpful
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Reviewed in the United Kingdom on 9 September 2022
Style Name: System Power 9 700WVerified Purchase
My PC's PSU failed (a 7yr old Corsair RM850, silent [no fan] for office use, but had a 10yr warranty). I got an EVGA 750BQ (cheap, but noisy fan even under no load - returned for refund) and bought this item. It's as quiet as the Corsair, and capable to power an i7 6-core + GTX1070Ti when stress testing both simultaneously. PSU fans do then spin up but are masked by the CPU and GPU fans. Summary - buy it - quiet, capable, and cheap.
Reviewed in the United Kingdom on 29 August 2020
Style Name: System Power 9 600W CMVerified Purchase
I was looking for something cheaper, around £50 and 500W which I expected would be non-modular. When I could not find anything good at that price due to the current Computer Parts shortages, I just settled for this one back in June (June 30). Well, I am happy I bought this semi-modular power supply. Most reviews said modular and semi-modular are small cosmetic enhancements. If you like me is building a PC inside a compact tower, like the beautiful Fractal Design Meshify C, you will appreciate having fewer cables coming from your power supply.

Meshify C like other compact PC Cases has a short Power Supply Shroud. So I only attached the cable for the Graphics Card, CPU, and one SATA Power cable to power two Hard Drives. I can imagine if it was a non-modular power supply with all the messy cables to take care of.

Performance-wise, this Power supply is much more than my PC needs in terms of power needs so I have a lot of headroom for upgrades. Fantastic quiet performance.
Customer image
5.0 out of 5 stars Solves cable management issues
Reviewed in the United Kingdom on 29 August 2020
I was looking for something cheaper, around £50 and 500W which I expected would be non-modular. When I could not find anything good at that price due to the current Computer Parts shortages, I just settled for this one back in June (June 30). Well, I am happy I bought this semi-modular power supply. Most reviews said modular and semi-modular are small cosmetic enhancements. If you like me is building a PC inside a compact tower, like the beautiful Fractal Design Meshify C, you will appreciate having fewer cables coming from your power supply.

Meshify C like other compact PC Cases has a short Power Supply Shroud. So I only attached the cable for the Graphics Card, CPU, and one SATA Power cable to power two Hard Drives. I can imagine if it was a non-modular power supply with all the messy cables to take care of.

Performance-wise, this Power supply is much more than my PC needs in terms of power needs so I have a lot of headroom for upgrades. Fantastic quiet performance.
Images in this review
Customer image
Customer image
Reviewed in the United Kingdom on 6 September 2020
Style Name: System Power 9 600WVerified Purchase
Well, it all works fine thus far but I will hold off on the full review until I have used my new system for a bit as all the components for the new build will be tied together. Delivery was spot on as it usually is with Amazon. There are rare occasions but as I have said they are rare.
Speaking of rare Amazon tracking showed the package on its way then amazon sent a message saying that it would be delayed and it didn't arrive then I would get a refund but then it arrived the next day(strange).
It fitted into my case well and thus far no issues (fingers crossed) and it is as quiet as it says on the box.
I will update as time goes by and let you all know how it performs.
The cost of PC parts is nothing less than extortion but the resellers have us where they want us in these times of lockdown I guess. c'est la vie.
Do you know what else would be strange?

A bird with three heads and seven wings that could sing soprano.

***********UPDATE 12/02/2022*************

This is the third one I have purchased (this one from Fuzion) and I must say that Fuzion is amazing with delivery well ahead of schedule and well packaged. You could see that they care about customer service and this shows in the way they despatched the product (well-done guys and girls). The two that I have been working well in other builds but if anything happens then I will update again.
Customer image
5.0 out of 5 stars Good PSU but a tad overpriced for what it is
Reviewed in the United Kingdom on 6 September 2020
Well, it all works fine thus far but I will hold off on the full review until I have used my new system for a bit as all the components for the new build will be tied together. Delivery was spot on as it usually is with Amazon. There are rare occasions but as I have said they are rare.
Speaking of rare Amazon tracking showed the package on its way then amazon sent a message saying that it would be delayed and it didn't arrive then I would get a refund but then it arrived the next day(strange).
It fitted into my case well and thus far no issues (fingers crossed) and it is as quiet as it says on the box.
I will update as time goes by and let you all know how it performs.
The cost of PC parts is nothing less than extortion but the resellers have us where they want us in these times of lockdown I guess. c'est la vie.
Do you know what else would be strange?

A bird with three heads and seven wings that could sing soprano.

***********UPDATE 12/02/2022*************

This is the third one I have purchased (this one from Fuzion) and I must say that Fuzion is amazing with delivery well ahead of schedule and well packaged. You could see that they care about customer service and this shows in the way they despatched the product (well-done guys and girls). The two that I have been working well in other builds but if anything happens then I will update again.
Images in this review
Customer image Customer image
Customer imageCustomer image
3 people found this helpful
Report
Reviewed in the United Kingdom on 12 June 2024
Style Name: System Power 9 400W CMVerified Purchase
needed a replacement unit
have a new smaller case so nice fit
Reviewed in the United Kingdom on 13 November 2024
Style Name: System Power 9 600WVerified Purchase
Good quality power supply is to install very quick
Reviewed in the United Kingdom on 21 August 2020
Style Name: System Power 9 700WVerified Purchase
Great PSU, very quite. One problem was that the 2x4 way 12 volt atx power plug did not have the correct plug profile on one of the plugs. So it goes against the golden rule of only only fitting plugs with the same profile as the socket. After contacting Amazon technical dept a replacement PSU was sent with the same problem. I then checked with voltmeter to make sure that the plugs were wired correctly as all the wires are black, and put the plug in the socket with the half round plug pins in the holes that were square. Problem solved. So anybody who buys this unit can safely insert these plugs into the socket even though the pin designations are wrong on one plug.
5 people found this helpful
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Reviewed in the United Kingdom on 10 July 2020
Style Name: System Power 9 400WVerified Purchase
(Edit lmao never mind that wasn’t the psu fan but it was my graphic card updated review after around a year of usage the psu didn't blow and it works like new, would recommend) The psu does a good job and its quiet while doing it.. But i give it 4 stars because from time to time (more often when gaming) the psu fan goes full speed for a second and goes to its normal speed, at first i didnt really think about it but after a while it got really annoying and i got worried that it might be a problem with the psu it self. Im not sure if i just got a damaged unit but if anyone knows what it is or how to fix it i would be thankful.
One person found this helpful
Report

Top reviews from other countries

Translate all reviews to English
Avalycheee
1.0 out of 5 stars Either DOA or i did something wrong
Reviewed in the United States on 24 October 2021
Style Name: System Power 9 400WVerified Purchase
At first I thought it was my motherboard but I went ahead and bought an EVGA power supply from my local Best Buy on a whim and my PC instantly turned on and I was able to run my bios. Not sure why this one didn't work. I went ahead and returned it.
Vincent
5.0 out of 5 stars Silencieuse
Reviewed in France on 12 August 2024
Style Name: System Power 9 400W CMVerified Purchase
Suffisante pour son application, silencieuse
Florian Punz
5.0 out of 5 stars Zuverlässiges und leises Netzteil!
Reviewed in Germany on 3 August 2024
Style Name: System Power 9 400WVerified Purchase
Das be quiet! ATX 400W System Power 9 BN245 ist genau das, was ich gesucht habe. Es liefert stabile Leistung und ist dabei angenehm leise, was besonders in einem ruhigen Arbeitsumfeld ein großer Vorteil ist. Die Installation war unkompliziert und die Bauqualität ist erstklassig. Mit 400W bietet es genügend Leistung für gängige PC-Systeme. Ein ausgezeichnetes Preis-Leistungs-Verhältnis und eine klare Empfehlung für alle, die Wert auf Zuverlässigkeit und Ruhe legen! ⭐️⭐️⭐️⭐️⭐️
Constantin
5.0 out of 5 stars Wer einen leisen Lüfter und optimales Kabelmanagement will, muss zuschlagen
Reviewed in Germany on 11 June 2024
Style Name: System Power 9 500W CMVerified Purchase
Erster Eindruck:
Das be quiet! System Power 9 500W CM Netzteil beeindruckt sofort durch seine solide Bauweise und die hochwertig ummantelten Kabel. Das teilmodulare Design und der leise, temperaturgesteuerte 120mm Lüfter sind Indikatoren für eine benutzerfreundliche und geräuscharme Lösung.

Erfahrungen nach Gebrauch:
Nach intensiver Nutzung über mehrere Wochen zeigt das Netzteil eine hervorragende Stabilität und Zuverlässigkeit. Die beiden 12V-Leitungen bieten eine konstante und leistungsstarke Stromversorgung, während die DC/DC-Technologie eine präzise Spannungsregulierung selbst bei hohen Lasten gewährleistet. Die Einbindung in ein Multi-GPU-System verläuft dank der zwei PCI-Express-Anschlüsse reibungslos.

Positiv:

Leiser Betrieb: Der temperaturgesteuerte 120mm Qualitätslüfter arbeitet extrem leise, ideal für geräuschempfindliche Umgebungen.
Effizienz und Zuverlässigkeit: Die DC/DC-Technologie und die unabhängigen 12V-Leitungen sorgen für eine stabile und effiziente Leistung.
Teilmodulares Kabelmanagement: Die hochwertigen, ummantelten Kabel und das teilmodulare Design erleichtern die Installation und verbessern das Kabelmanagement.
Optimales Kabelmanagement: Das Netzteil ermöglicht eine ordentliche Kabelführung, ideal für Nutzer, die einen aufgeräumten und ästhetischen PC-Build anstreben.
Negativ:

500W Begrenzung: Für extrem leistungsstarke Systeme könnte die 500W-Grenze eine Einschränkung darstellen.
Eingeschränkte Verfügbarkeit von Anschlüssen: Obwohl die wichtigsten Anschlüsse vorhanden sind, könnten Nutzer mit speziellen Anforderungen zusätzliche Adapter benötigen.
Für wen das Produkt zu empfehlen ist:
Das be quiet! System Power 9 500W CM Netzteil ist ideal für preisbewusste PC-Bauer, die eine zuverlässige und leise Stromversorgung suchen. Es eignet sich hervorragend für mittelstarke Gaming-Systeme und Büro-PCs, die eine stabile und effiziente Leistung benötigen, ohne dabei die Bank zu sprengen. Mit seiner umfassenden Ausstattung an Sicherheitsfunktionen und der bewährten be quiet!-Qualität ist es eine ausgezeichnete Wahl für alle, die Wert auf Zuverlässigkeit, Langlebigkeit und einen aufgeräumten PC-Build legen.
Customer image
Constantin
5.0 out of 5 stars Wer einen leisen Lüfter und optimales Kabelmanagement will, muss zuschlagen
Reviewed in Germany on 11 June 2024
Erster Eindruck:
Das be quiet! System Power 9 500W CM Netzteil beeindruckt sofort durch seine solide Bauweise und die hochwertig ummantelten Kabel. Das teilmodulare Design und der leise, temperaturgesteuerte 120mm Lüfter sind Indikatoren für eine benutzerfreundliche und geräuscharme Lösung.

Erfahrungen nach Gebrauch:
Nach intensiver Nutzung über mehrere Wochen zeigt das Netzteil eine hervorragende Stabilität und Zuverlässigkeit. Die beiden 12V-Leitungen bieten eine konstante und leistungsstarke Stromversorgung, während die DC/DC-Technologie eine präzise Spannungsregulierung selbst bei hohen Lasten gewährleistet. Die Einbindung in ein Multi-GPU-System verläuft dank der zwei PCI-Express-Anschlüsse reibungslos.

Positiv:

Leiser Betrieb: Der temperaturgesteuerte 120mm Qualitätslüfter arbeitet extrem leise, ideal für geräuschempfindliche Umgebungen.
Effizienz und Zuverlässigkeit: Die DC/DC-Technologie und die unabhängigen 12V-Leitungen sorgen für eine stabile und effiziente Leistung.
Teilmodulares Kabelmanagement: Die hochwertigen, ummantelten Kabel und das teilmodulare Design erleichtern die Installation und verbessern das Kabelmanagement.
Optimales Kabelmanagement: Das Netzteil ermöglicht eine ordentliche Kabelführung, ideal für Nutzer, die einen aufgeräumten und ästhetischen PC-Build anstreben.
Negativ:

500W Begrenzung: Für extrem leistungsstarke Systeme könnte die 500W-Grenze eine Einschränkung darstellen.
Eingeschränkte Verfügbarkeit von Anschlüssen: Obwohl die wichtigsten Anschlüsse vorhanden sind, könnten Nutzer mit speziellen Anforderungen zusätzliche Adapter benötigen.
Für wen das Produkt zu empfehlen ist:
Das be quiet! System Power 9 500W CM Netzteil ist ideal für preisbewusste PC-Bauer, die eine zuverlässige und leise Stromversorgung suchen. Es eignet sich hervorragend für mittelstarke Gaming-Systeme und Büro-PCs, die eine stabile und effiziente Leistung benötigen, ohne dabei die Bank zu sprengen. Mit seiner umfassenden Ausstattung an Sicherheitsfunktionen und der bewährten be quiet!-Qualität ist es eine ausgezeichnete Wahl für alle, die Wert auf Zuverlässigkeit, Langlebigkeit und einen aufgeräumten PC-Build legen.
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Francesca/Giangio
5.0 out of 5 stars Silenzioso ed efficiente
Reviewed in Italy on 13 May 2024
Style Name: System Power 9 700W CMVerified Purchase
Un ottimo alimentatore che, pur non essendo totalmente modulare ma solo in parte, svolge in maniera impeccabile il suo lavoro. E' possibile collegare solo i cavi necessari alla propria build mentre i cavi di alimentazione della scheda madre sono fissi. Molto silenzioso, ha potenza da vendere. L'ho montato su un case Be Quiet con estrema facilità. Ottimo prodotto.