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Quiet Power Supplies

Power is the lifeblood of any PC and it pays to make sure it’s as clean and reliable as possible. Our high-quality range of power supply units offer a great combination of performance and value.

High Performance Quiet PSUs

It is highly recommended for a modern PC system to incorporate a high-quality PSU capable of coping with the power demands of the most up to date components. However, a powerful PSU does not necessarily need to be noisy! Quiet PC’s range of near-silent power supply units all have quiet features to ensure a virtually silent.

Upgrading a noisy PC power supply

With any significant upgrade of your PC you should consider whether your new components need a more powerful and quiet PSU. Our range of virtually silent PSUs are able to handle the most demanding power requirements. Smooth, clean outputs, excellent regulation, effortless power delivery, rock-solid reliability day in, these are all features which make these quiet PC power supplies the number one choice for the discerning customer.

Why do you need a high quality PSU?

Compromising on your PSU can mean compromising on system stability. Poor voltage regulation and filtering from your PC power supply can cause component stress and cause your system to crash randomly. This can cause the loss of important data and ultimately decrease the lifespan and reliability of your PC. All of our quiet PSUs are standard 100% ATX compatible units. They are AMD approved and conform fully to Intel’s ATX specification.

How can PSUs contribute to PC noise?

As the PC Power Supply Unit converts power from AC to low-voltage DC, some electricity is unavoidably converted to heat. To prevent the PSU getting too hot this heat is removed by a built in fan (or two). Fans can be a major cause of PC noise due to airflow and fan bearings. The virtually silent PSUs we have selected all address this by using innovative technology to optimise efficiency and reduce fan noise. For example our power supplies have a built-in temperature controlled fan. The fan’s RPM will increase depending on the internal temperature of the PSU. Other power supplies go one step further and turn the fan off completely. It only rotates when the internal temperature of the PSU reaches a certain point. From a noise point of view this gives you quietness you would expect but also the peace of mind that the fan will start if things get a little hot.

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Dell or HP owners

Our quiet power supply units are fully ATX compliant, which means that they will work in any standard ATX PC. You may or may not realise that PCs manufactured by Dell or HP may use a power supply which often looks to be industry-standard, but in fact employs different wiring which makes replacement of the power supply with an ATX model impossible. Sometimes the physical size of the PSU is different too. This approach ensures that when you need to replace or upgrade Dell or HP components, the only place you can buy them from is the manufacturer! With this in mind, Dell or HP owners please check that our PSUs are compatible with your system before you buy. However, we do know that Dell 8250, 8300 and 4600 models use standard ATX power supplies so you can use any of our power supplies in these machines.

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Seasonic PRIME SSR-600TL 600W 80PLUS Titanium Fanless Modular Power Supply

3 in stock
PRIME SSR-600TL 600W 80PLUS Titanium Fanless Modular Power Supply
  • Ultra-High Efficiency, 80 PLUS Titanium Certified
  • Micro Tolerance Load Regulation (0.5%)
  • True Fanless Design
  • Fully Modular Cabling Design
  • Multi-GPU Technologies Supported
  • Gold-Plated High Current Connectors/Terminals
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$215.18
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Nofan P-500A Silent 500W 80PLUS Gold Fanless Modular Power Supply Unit Ultra

275 in stock
P-500A Silent 500W 80PLUS Gold Fanless Modular Power Supply Unit
  • Fanless design for a 100% silent and dust-free PC
  • 90% efficiency; complies with 80PLUS GOLD certification
  • Mesh-sleeved cables with velcro cable management
  • 500 watt output gives ample power for most PCs
  • Standby power under one watt
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$180.63
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be quiet Straight Power 11 CM 1000W Modular PSU, BN285

2 in stock
Straight Power 11 CM 1000W Modular PSU, BN285
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$170.12
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be quiet Straight Power 11 CM 850W Modular PSU, BN284

3 in stock
Straight Power 11 CM 850W Modular PSU, BN284
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$143.75
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FSP Hydro G 850W Semi-Fanless Modular PSU, 80+ Gold

17 in stock
Hydro G 850W Semi-Fanless Modular PSU, 80+ Gold
  • Semi-fanless design for silent operation
  • Full Japan-made electrolytic capacitors
  • Powerful single +12V rail design
  • SLI and Crossfire ready
  • 80PLUS gold certification
  • Full protections: OCP, OVP, SCP, OPP, UVP, OTP
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$141.05
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Streacom ST-ZF240 ZeroFlex 240W Passive PSU for Streacom Chassis

49 in stock, 150 more due on 20 Sep
ST-ZF240 ZeroFlex 240W Passive PSU for Streacom Chassis
  • Totally passive 240W PSU
  • Installed inside the chassis
  • Designed for Streacom FC5, FC9 and FC10 chassis
  • 93% efficiency
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$140.56
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be quiet Straight Power 11 CM 750W Modular PSU, BN283

6 in stock
Straight Power 11 CM 750W Modular PSU, BN283
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$125.26
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FSP Hydro PTM 750W Quiet Modular PSU, 80+ Platinum OEM

15 in stock
Hydro PTM 750W Quiet Modular PSU, 80+ Platinum OEM
  • Semi-fanless design for silent operation
  • Full Japan-made electrolytic capacitors
  • Powerful single +12V rail design
  • SLI and Crossfire ready
  • 80 PLUS Platinum certification
  • Full protections: OCP, OVP, SCP, OPP, UVP, OTP
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$112.68
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be quiet Straight Power 11 CM 650W Modular PSU, BN282

7 in stock
Straight Power 11 CM 650W Modular PSU, BN282
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$111.06
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Micronics Astro GD White 750W Modular PSU, 80+ Gold

24 in stock
Astro GD White 750W Modular PSU, 80+ Gold
  • High efficiency 80PLUS Gold
  • Ultra-quiet 135mm white LED Fan
  • Full modular design
  • After Cooling ready
  • Full protections: OCP, OVP, SCP, OPP, UVP, OTP
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$106.81
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Streacom ST-NANO160 160W nanoPSU and AC/DC adapter block

29 in stock, 200 more due on 20 Sep
ST-NANO160 160W nanoPSU and AC/DC adapter block
  • Very small, can built into ultra-compact PC enclosures and slim server enclosures
  • Fits any motherboard equipped with 24pin ATX connector
  • 100% silent, fanless, no moving parts
  • Highly efficient design, does not produce a lot of heat
  • Ideal for Intel processors as VIA C7/nano or AMD motherboards
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$106.02
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FSP Hydro G 750W Semi-Fanless Modular PSU, 80+ Gold

5 in stock
Hydro G 750W Semi-Fanless Modular PSU, 80+ Gold
  • Semi-fanless design for silent operation
  • Full Japan-made electrolytic capacitors
  • Powerful single +12V rail design
  • SLI and Crossfire ready
  • 80PLUS gold certification
  • Full protections: OCP, OVP, SCP, OPP, UVP, OTP
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$105.52
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be quiet Straight Power 11 CM 550W Modular PSU, BN281

3 in stock
Straight Power 11 CM 550W Modular PSU, BN281
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$91.08
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be quiet Straight Power 11 CM 450W Modular PSU, BN280

1 in stock
Straight Power 11 CM 450W Modular PSU, BN280
  • Virtually inaudible operation
  • Very quiet SilentWings 3 fan
  • 80PLUS Gold certification
  • Fully Modular cable management
  • NVIDIA SLI Ready and AMD CrossFireX
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$90.78
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Streacom ST-NANO120 120W nanoPSU and AC/DC adapter block

24 in stock
ST-NANO120 120W nanoPSU and AC/DC adapter block
  • Very small, can built into ultra-compact PC enclosures and slim server enclosures
  • Fits any motherboard equipped with 24pin ATX connector
  • 100% silent, fanless, no moving parts
  • Highly efficient design, does not produce a lot of heat
  • Ideal for Intel processors as VIA C7/nano or AMD motherboards
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$73.07
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FSP Hyper M 700W Modular Quiet Power Supply

26 in stock
Hyper M 700W Modular Quiet Power Supply
  • Excellent value for money modular PSU
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA @ 50% load
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$70.59
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FSP Hyper M 600W Modular Quiet Power Supply

20 in stock
Hyper M 600W Modular Quiet Power Supply
  • Excellent value for money modular PSU
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA @ 50% load
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$65.47
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FSP Hyper S 700W Quiet Power Supply

69 in stock
Hyper S 700W Quiet Power Supply
  • Excellent value for money PSU from FSP
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA
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$60.37
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FSP Hyper M 500W Modular Quiet Power Supply

25 in stock
Hyper M 500W Modular Quiet Power Supply
  • Excellent value for money modular PSU
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA @ 50% load
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$60.37
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FSP Hyper S 600W Quiet Power Supply

29 in stock
Hyper S 600W Quiet Power Supply
  • Excellent value for money PSU from FSP
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA
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$55.25
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FSP Hyper S 500W Quiet Power Supply

23 in stock
Hyper S 500W Quiet Power Supply
  • Excellent value for money PSU from FSP
  • Meets 85% efficiency
  • Complies with ATX 12V v2.4
  • 6pin+2 PCI-Express graphic card connector ready
  • Quiet, 120mm Fan, less than 19dBA
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$50.13
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be quiet Pure Power 11 400W Quiet PSU 80PLUS Gold, BN292

5 in stock
Pure Power 11 400W Quiet PSU 80PLUS Gold, BN292
  • 12V-rails ensure rock-solid voltage stability for powerful multi-GPU systems
  • 80PLUS certification and up to 91% power conversion efficiency
  • Exceptionally quiet operation features a silence-optimised 120mm be quiet fan
  • Stable operation thanks to DC-to-DC power conversion technology
  • Attractively sleeved cables simplify component installation
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$50.10
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Micronics Classic II AC 600W PSU, 80+

23 in stock
Classic II AC 600W PSU, 80+
  • Available in 500W, 600W and 700W
  • Less than 1W standby power consumption
  • High efficiency 80PLUS certified
  • Flat ribbon cabling
  • Features “After Cooling"
  • Ultra-quiet 120mm fan
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$49.83
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SilverStone SST-ST30SF Strider Semi-Fanless 300W SFX Power Supply

10 in stock
SST-ST30SF Strider Semi-Fanless 300W SFX Power Supply
  • Intelligent semi-fanless operation
  • Support standard SFX form factor and ATX via included bracket
  • 80 PLUS Bronze level efficiency
  • Very quiet 80mm fan with 18dBA minimum
  • Single PCI-E 6pin connector support
  • Active PFC
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$47.36
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be quiet Pure Power 11 300W Quiet PSU 80PLUS Bronze, BN290

7 in stock
Pure Power 11 300W Quiet PSU 80PLUS Bronze, BN290
  • 12V-rails ensure rock-solid voltage stability for powerful multi-GPU systems
  • 80PLUS certification and up to 91% power conversion efficiency
  • Exceptionally quiet operation features a silence-optimised 120mm be quiet fan
  • Stable operation thanks to DC-to-DC power conversion technology
  • Attractively sleeved cables simplify component installation
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$43.41
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Micronics Classic II AC 500W PSU, 80+

6 in stock
Classic II AC 500W PSU, 80+
  • Available in 500W, 600W and 700W
  • Less than 1W standby power consumption
  • High efficiency 80PLUS certified
  • Flat ribbon cabling
  • Features “After Cooling"
  • Ultra-quiet 120mm fan
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$42.81
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Gelid Solutions Fourza - Flexible USB Docking Station For Phones and Tablets Save 31%

17 in stock
Fourza - Flexible USB Docking Station For Phones and Tablets

SPECIAL OFFER
  • Tidy method of charging multiple devices at once
  • Non-slip rubber surface
  • Charges up to four devices simultaneously
  • 2.4A per port, 48W total power
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$19.20 (was $27.93)
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Nanoxia CoolForce 24 Aluminium Cable Clip

30 in stock
CoolForce 24 Aluminium Cable Clip
  • 100% aluminium cable clips
  • Provides a visually striking cabling solution
  • Available in four different sizes
  • Easy to install
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$16.54
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Nanoxia CoolForce 8 Aluminium Cable Clip

22 in stock
CoolForce 8 Aluminium Cable Clip
  • 100% aluminium cable clips
  • Provides a visually striking cabling solution
  • Available in four different sizes
  • Easy to install
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$14.22
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Nanoxia CoolForce 6 Aluminium Cable Clip

24 in stock
CoolForce 6 Aluminium Cable Clip
  • 100% aluminium cable clips
  • Provides a visually striking cabling solution
  • Available in four different sizes
  • Easy to install
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$13.32
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Nanoxia CoolForce 4 Aluminium Cable clip

22 in stock
CoolForce 4 Aluminium Cable clip
  • 100% aluminium cable clips
  • Provides a visually striking cabling solution
  • Available in four different sizes
  • Easy to install
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$12.55
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Quiet PC Molex IDE to Serial ATA Power Adapter Cable (Single)

6 in stock
Molex IDE to Serial ATA Power Adapter Cable (Single)
  • Has a 4-pin Molex plug at one end, and a SATA power socket at the other
  • Useful when adding extra hard drives when no spare SATA power connectors are available
  • Excellent quality, great value and easy to install
  • Approximately 20cm long
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$3.06
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Gelid Solutions 24pin Acrylic Cable Holder

5 in stock
24pin Acrylic Cable Holder
  • Easy cable wire fixture
  • Fits all cables with sleeving
  • Transparent color
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$2.48
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Gelid Solutions 8pin Acrylic Cable Holder

12 in stock
8pin Acrylic Cable Holder
  • Easy cable wire fixture
  • Fits all cables with sleeving
  • Transparent color
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$2.10
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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:

    1. 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.
    2. 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.
    3. 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.

    OCP - Over-Current Protection

    OVP - Over Voltage Protection

    UVP - Under Voltage Protection

    SCP - Short Circuit Protection

    OPP - Over Power Protection

    OTP - Over Temperature Protection

    UL - Underwriters Laboratories, more information.

    TÜV - Technical Inspection Association, more information.

    CE - European Conformity, more information.

    FCC - Federal Communications Commission, more information.

    RoHS - Restriction of Hazardous Substances Directive, more information.

    WEE - Electronic waste, more information.

    80 PLUS - Promotes energy efficiency for PC power supplies, more information.

    ErP - Energy Related Products, more information.

    More information on certification marks can be found here.

“Quickly responded to my email enquiries…”

“Quickly responded to my email enquiries with friendly and good advice.”

11th June 2019 via Trustpilot