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3,176 reviews at Trustpilot.3,176 reviews
Astro GD White 750W Modular PSU, 80+ Gold €117,04
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Micronics Astro GD White 750W Modular PSU, 80+ Gold

Boasting 750W power, the Astro GD from Micronics features “After Cooling” where the PSUs fan continues to run after shut down to prolong component life. This fully modular PSU is housed in an elegant white chasing with a white LED fan.


  1. High efficiency 80PLUS Gold
  2. Ultra-quiet 135mm white LED Fan
  3. Full modular design
  4. After Cooling ready
  5. Full protections: OCP, OVP, SCP, OPP, UVP, OTP

Micronics Astro GD power supply provides a whooping 750W of power and is encased in an elegant white casing along with a very quiet 1350mm white LED fan to spruce things up. It features flat cabling (to improve airflow), “After Cooling” and a vast array of cabling options to power virtually any PC. It is also a fully modular PSU meaning you only need to attach the cables you need to power your PC. This helps reduce clutter inside the PC and further improve airflow.

After Cooling

After Cooling is a simple but very effective feature. When the PC is switched off the fan inside the PSU will continue to rotate. This allows the internal components of the PSU to cool down much quicker than a PSU without this feature. The result of this helps to prolong the life of the PSU. The below image shows the difference between a PSU with After Cooling and one without.

Fully Modular Power Supply

Unlike some modular power supplies that have the 24-pin ATX and 4/4-pin EPS cables permanently attached, the Astro GD PSU doesn’t. The benefits of this mainly convenience. In the rare occasion of PSU failure replacing the PSU is very simple as all that is required is for the cables to be unplugged from the PSU with just the main PSU housing replaced. This, therefore means all PSU wiring can be left in situ, making replacing it a breeze!

The Astro GD features flat PSU cabling which reduces the amount of space they take up compared to round cabling. Flat cables also give better flexibility, allowing for a tidier and cooler PC.

Active PFC

Active Power Factor Correction (Active PFC) is basically a AC to DC convertor that controls the electrical current supplied to the PSU via pulse-width modulation (PWM). This helps to improve efficiency and minimise power loss while maximising the supplied current. It also protects the power supply by suppressing the generation of high frequencies.

Quiet 135mm White LED Fan Cools Premium Components

The internal components of the power supply are just as impressive as the external casing. It features Japanese premium capacitors, a plethora of safety protection and LLC convertor which provides uncompromised performance, efficiency and reliability. As a result the PSU is 80 PLUS Gold certified, giving it an efficiency rating of up to 92%! And all these high quality internal component are cooled by a large 135mm quiet white LED fan which adds style to your PC, while producing very little noise!

SpecificationsAstro GD White 750W
+3.3V maximum output current22 A
+5V maximum output current22 A
+12 maximum output current62.5 A
Form factor ATX 12VVersion 2.4
80PLUS CertificationGold
Active PFCYes
ProtectionOCP, OVP, UVP, SCP, OPP, OTP
Energy Star6.0
ErP2013 readyYes
ATX-Mainboard (20+4-pin)Yes
PCI-Express (6+2-pin)4
P8-/P4-connector1x P4+4
SATA Connectors8
Molex Connectors4
Floppy Connectors1
Dimensions 160 x 150 x 86mm
Warranty60 months
EAN barcode8809436060723
SpecificationsAstro GD White 750W
+3.3V maximum output current22 A
+5V maximum output current22 A
+12 maximum output current62.5 A
Form factor ATX 12VVersion 2.4
80PLUS CertificationGold
Active PFCYes
ProtectionOCP, OVP, UVP, SCP, OPP, OTP
Energy Star6.0
ErP2013 readyYes
ATX-Mainboard (20+4-pin)Yes
PCI-Express (6+2-pin)4
P8-/P4-connector1x P4+4
SATA Connectors8
Molex Connectors4
Floppy Connectors1
Dimensions 160 x 150 x 86mm
Warranty60 months
EAN barcode8809436060723

Product Resources


  • 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.

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“Excellent - very satisfied”

“Excellent, high quality product and service. Good advice and very happy with the silent pc. Will buy again.”

13th February 2019 via Trustpilot