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750W System Power 10 80Plus Bronze PSU $ 77.18
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System Power 10 650W 80Plus Bronze PSU $ 64.03
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System Power 10 550W 80Plus Bronze PSU $ 56.46
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System Power 10 450W 80Plus Bronze PSU $ 47.41
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Be Quiet System Power 10 Power Supplies

System Power 10 series are the PSU of choice for price-conscious PC builders that do not want to dispense on reliability and quietness.

Features

  1. Rock-solid stability with 2 strong 12V-rails
  2. 80 PLUS Bronze efficiency (up to 89%)
  3. Temperature-controlled 120mm fan reduces system noise
  4. Complete suite of top safety features
  5. 3-year manufacturer’s warranty

System Power 10 series has been built with price-conscious users in mind that do not want to dispense on reliability and quietness. It features a temperature-controlled fan, modern stand-by and a remarkably low stand-by-drain underline the value System Power 10 PSUs offer. Providing a good and 80 PLUS Bronze certified efficiency makes this PSU a top choice at entry price level.

EXCEPTIONALLY QUIET OPERATION

The silence-optimised 120mm be quiet! fan is thermally governed to strike the best balance between effective cooling and quietness. Airflow-optimised fan blades reduce turbulence, enabling best-in-class quiet functionality and the almost inaudible operation that be quiet! is famous for.

HIGH-CLASS TECHNOLOGIES

LLC and Synchronous Rectifier (SR) provide very stable operation and enhanced voltage regulation. The PSU is equipped with DC-to-DC conversion for tight voltage regulation even under heavy cross-loading conditions.

80 PLUS BRONZE CERTIFICATION

The System Power 10 series has a 80 PLUS Bronze certification with an efficiency rating of up to 89.1% giving it convincing evidence of this PSU’s power saving operation.

STRONG 12V RAIL

System Power 10 provide enough power for demanding graphics cards. Safety protections defend against overcurrents, over- and undervoltages, overtemperature, short circuits and overloads, thus keeping your valuable components safe.

Show specifications and reviews for:
SpecificationsBN329BN328BN327BN326
ModelSystem Power 10 750W System Power 10 650W System Power 10 550W System Power 10 450W
Power Output750W 650W 550W 450W
Form FactorATX ATX ATX ATX
Form factor EPS 12VVersion 2.92 Version 2.92 Version 2.92 Version 2.92
ModularWired Wired Wired Wired
+3.3V (A)20 20 20 20
+5V (A)20 20 20 20
+12V1 (A)62.5 54.17 45.8 37.5
-12V (A)0.3 0.3 0.3 0.3
+5Vsb (A)3 3 3 3
Max. combined power 12V (W)750 650 550 450
Max. combined power 3.3V + 5V (W)130 120 120 110
Hold-up time at 100% load (ms)17 17 (@75%) 17 (@75%) 17 (@75%)
Power good signal100 - 150ms 100 - 150ms 100 - 150ms 100 - 150ms
Voltage (Vac)200 - 240 200 - 240 200 - 240 200 - 240
Frequency (Hz)50 50 50 50
Input current (A)5 5 5 5
PFCActive Active Active Active
Power factor at 100% load
0.95
0.95
0.95
0.95
Power consumption in standby (W)<0.15 <0.15 <0.15 <0.15
Average life time (h / 25°C)
100,000
100,000
100,000
100,000
Operating temperature up to (°C)40 40 40 40
80 PLUS certificationBronze Bronze Bronze Bronze
Efficiency (%) at 230V, 20% load88.2 88 87.4 86.8
Efficiency (%) at 230V, 50% load89.2 88.5 89.1 88.5
Efficiency (%) at 230V, 100% load87.0 85.6 85.7 85.5
ATX-Motherboard (20+4-pin)1 1 1 1
P4+4 (CPU)1 1 1 1
P8 (CPU)1 1 1 1
PCI-e 6+2-pin (GPU)4 2 2 2
PATA (molex)1 1 1 1
SATA6 6 6 6
CoolingFanned Fanned Fanned Fanned
Noise Level (20% load)8.8 dBA 8.9 dBA 8.6 dBA 8.7 dBA
Noise Level (50% load)14.2 dBA 11.2 dBA 9.4 dBA 9.8 dBA
Noise Level (max)34.8 dBA 30.7 dBA 25.7 dBA 19.2 dBA
ProtectionOCP, OVP, UVP, SCP, OTP, OPP, SIP OCP, OVP, UVP, SCP, OTP, OPP, SIP OCP, OVP, UVP, SCP, OTP, OPP, SIP OCP, OVP, UVP, SCP, OTP, OPP, SIP
SafetyUKCA, CE, CB, TÜV, RCM (Australia) UKCA, CE, CB, TÜV, RCM (Australia) UKCA, CE, CB, TÜV, RCM (Australia) UKCA, CE, CB, TÜV, RCM (Australia)
Warranty36 months 36 months 36 months 36 months
EAN barcode4260052189092 4260052189085 4260052189078 4260052189061
SpecificationsBN329BN328BN327BN326
ModelSystem Power 10 750W System Power 10 650W System Power 10 550W System Power 10 450W
Power Output750W 650W 550W 450W
Form FactorATX
Form factor EPS 12VVersion 2.92
ModularWired
+3.3V (A)20
+5V (A)20
+12V1 (A)62.5 54.17 45.8 37.5
-12V (A)0.3
+5Vsb (A)3
Max. combined power 12V (W)750 650 550 450
Max. combined power 3.3V + 5V (W)130 120 110
Hold-up time at 100% load (ms)17 17 (@75%)
Power good signal100 - 150ms
Voltage (Vac)200 - 240
Frequency (Hz)50
Input current (A)5
PFCActive
Power factor at 100% load
0.95
Power consumption in standby (W)<0.15
Average life time (h / 25°C)
100,000
Operating temperature up to (°C)40
80 PLUS certificationBronze
Efficiency (%) at 230V, 20% load88.2 88 87.4 86.8
Efficiency (%) at 230V, 50% load89.2 88.5 89.1 88.5
Efficiency (%) at 230V, 100% load87.0 85.6 85.7 85.5
ATX-Motherboard (20+4-pin)1
P4+4 (CPU)1
P8 (CPU)1
PCI-e 6+2-pin (GPU)4 2
PATA (molex)1
SATA6
CoolingFanned
Noise Level (20% load)8.8 dBA 8.9 dBA 8.6 dBA 8.7 dBA
Noise Level (50% load)14.2 dBA 11.2 dBA 9.4 dBA 9.8 dBA
Noise Level (max)34.8 dBA 30.7 dBA 25.7 dBA 19.2 dBA
ProtectionOCP, OVP, UVP, SCP, OTP, OPP, SIP
SafetyUKCA, CE, CB, TÜV, RCM (Australia)
Warranty36 months
EAN barcode4260052189092 4260052189085 4260052189078 4260052189061

Product Resources

FAQ

  • Do high wattage power supplies cost more to run?

    No - the rated wattage of a power supply refers to the maximum amount of power it can deliver at full load, not how much power it uses. More powerful PSUs will consume around the same amount of power as lower powered power supplies in any given PC system, so your electricity bill will not be higher when using a more powerful power supply!

    The best way to reduce your electricity bill when using your PC is to use a more efficient power supply or make your PC consume less power by removing components which are not needed, such as extra drives and expansion cards, or by choosing a cooler-running processor or graphics card.

  • My brand new power supply doesn’t work! Am I doing something wrong?

    It’s possible that the power supply may be faulty, but here are some simple things to check. Firstly, a power supply will not work if you simply plug it in and flick the switch. The power supply will only turn on if you connect it to a working motherboard and associated items (processor, memory, video card, etc). It is actually the motherboard which tells the power supply when to switch on.

    Secondly (if applicable), check the voltage is set correctly to 115/230 volts depending on what country you are in. Thirdly, if possible it would be good to try the power supply in another PC to see if it works, or try another power supply in your PC to see if that works. You can then tell whether it is the power supply which is faulty or the actual PC itself. If all else fails, please contact us for further support, and/or return details.

  • Why should I buy a whole new PSU when I could just replace the noisy fan in my existing one?

    Virtually all the noise generated by a PC power supply originates from the cooling fan inside it, so simply replacing the fan with a quiet fan may seem an obvious way to go. However, if you are thinking about attempting this operation, please bear the following points in mind:

    • Your existing power supply will be designed to run with a specific amount of airflow in order to adequately cool the components inside and reducing the airflow may lead to overheating and damage to the power supply and/or PC.
    • All PC power supplies contain very high voltages and even with the power disconnected, the voltages stored in the capacitors can be easily enough to kill. It is not recommended to take the cover off any PC power supply for this reason unless you are absolutely confident of your own ability. Because of the grave dangers involved, all PC power supplies by law carry a warning label forbidding removal of the power supply case.
    • There will be no standard PC fan connector inside the power supply to use to connect a replacement fan, and it would probably have to be soldered directly into the PCB inside the power supply, or have a specialist power connector attached. This can be a tricky operation to say the least.

    Please consider the above points very carefully before proceeding with an operation to replace the fan in your existing power supply!

  • What is PFC (Power Factor Correction)?

    If you are interested in being “green” and saving the planet, you might like to read a short explanation of how our power supplies can save energy using Active PFC (Power Factor Correction), not to be confused with Power Conversion Efficiency which is also very good in most of our PSUs. “Power Factor” is a measure of how efficiently electrical power is consumed. Ideally, Power Factor would be 1 (or 100%) and known as unity.

    Unfortunately in the real world, Power Factor is reduced by highly inductive loads down to values of 0.7 (70%) or less. This induction is caused by equipment such as small electric motors, fans, fluorescent lighting ballasts and transformers such as those in PSUs. This is bad news for the electricity generating companies who can impose a surcharge on heavy users if they have a consistently low Power Factor, as more electricity has to be produced to make up the shortfall.

    Power Factor Correction (PFC) is used in some equipment to minimise the inductive component of the electrical current. This helps to reduce the losses in the electrical supply to that equipment. Power Factor Correction capacitors are normally used to reduce induction in an electrical load, which minimises wasted energy and hence improves the efficiency of a company and reduces electricity costs.

    It is not usually practical to reach unity, i.e. Power Factor 1, and it seems that most electricity supply companies accept consumers having a Power Factor as low as 0.94 (94%) without imposing a surcharge. Unfortunately most of the cheap (and not so cheerful) PSUs tend to have a Passive PF as low as 0.75 or 75% which in a large office can lead to a PF surcharge.

    However, the good news is that most of Quiet PC’s PSUs implement a system known as Active PFC which involves some clever electronics. This means that their power factor (PF) can be as high as 0.94 or 94% (at full load), while harmful harmonic frequencies are reduced to well below legal requirements. So by using our products, you can be happy in the knowledge that you are doing your bit to save the planet!

  • How do I know what size of wattage power supply I need?

    The best answer we can give to this question is to go ahead and take an intelligent “guesstimate”! There are no hard and fast rules about what size of power supply any given PC needs as a minimum. Our advice would be that if you are replacing an existing power supply, then consider a new one at least of the same wattage as the old one. In addition, if you wish to build in a “safety margin” to allow for reliable running and possible future upgrades, consider adding 100-200 watts to the rating of your existing unit.

    If you are building a new PC, most customers now buy a power supply rated in the region of 500-800 watts depending primarily on the performance level of their graphics card(s) and number of drives to be installed. But in any event if you are unsure about which power supply would be best for your PC then please do contact us by phone or email and we will be happy to give you a specific recommendation based on your budget.

  • My new PSU came with a 24-pin connector but my motherboard needs 20 pins! Do I need an adaptor cable?

    We receive many customer enquiries about this. In fact, most of the 24-pin compatible power supplies we sell come with special motherboard connectors which can be converted to 20-pins with no additional conversion cables. All you need to do is look carefully at the connector and you will see that the end four pins can be slid off, turning the connector into a 20-pin compatible one (see below) - easy when you know how!

    Image showing how to change a power supply’s 24-pin motherboard connector into a 20-pin connector by unclipping the end four-pin block
    Image showing how to change a power supply’s 24-pin motherboard connector into a 20-pin connector by unclipping the end four-pin block
  • What do the PSU safety protection abbreviations mean?

    There are many possible safety protections a PSU can have. Below is a list of what each abbreviation means. Please note, not all PSUs have all safety protections.

    More information on certification marks can be found here.

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