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Cooler Master GM Series G650M ATX Power Supply

650W, 80 PLUS Bronze, Semi-Modular, 3 Year Warranty

Cooler Master GM Series G650M ATX Power Supply
Ordered Upon Request question tooltip

£77.42

£66.25 inc vat

£55.21 ex vat

You save £11.17

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Order Code: CM-G650M

Manf.Code: RS650-AMAAB1-UK

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Express Delivery

Free Delivery Available

Delivered within 3-5 working days

More delivery options including Weekend, timed and European delivery are also available at the checkout.

Low Rate 14.9% Finance

Spread the cost of your purchase with a low rate 14.9% APR over 12, 24 or 36 months.

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In the unlikey event that you are unhappy with your purchase, simply return it to us within 14 days for a refund.*

*Excludes delivery costs. Item must be in original condition, not applicable to opened Software/Licenses or customised items.

Full details

If you are buying for work or your business we offer a range of benefits to help, such as:

  • Credit Account Facilities (subject to approval)
  • ISO 9001/14001 Certification
  • Business Leasing
  • Members of major purchasing frameworks
  • Microsoft Gold Partner
  • VMWare Education Specialist
Find out more

Cooler Master GM Series G650M ATX Power Supply overview

The GM Series is semi-modular to reduce the number of unnecessary cables for better cable management. The single +12V rail on all GM Series power supplies allows for superior load balancing and GPU compatibility.

Cooler Master Features



Intelligent 120mm Fan

Features a silent 120mm fan with intelligent fan-speed control, to enhance longevity and help reduce noise in power unit.


Custom DC-DC Module

Custom designed 12V to 3.3V and 5V module offers notably higher efficiency and voltage stability than other designs.


Double Layer EMI Filter

Our Double Layer EMI Filter ensures extremely low levels of electromagnetic interference


Unique 3D Circuit Design

Offers high efficiency, improves heat dissipation and reduces the unnecessary cables which results in much lower crosstalk, signal noise.


Semi-Modular Cable System

Only use the cables you need, no unnecessary cable mess! Building a clean and tidy system with excellent airflow has never been this easy and convenient

Power Specification

This power supply conforms to the Ecos 80 PLUS Bronze certification


Power Output Specifications
+3.3V Rail 22A (120W)
+5V Rail 22A (120W)
+12V Rail 52A (624W)
+5Vsb Rail 2.5A (12.5W)
-12V Rail 0.3A (3.6W)
Total Power Output 650W @ +40C

Power Input Specifications
Input Voltage 100-240 VAC
AC Input 10-5A
Input Frequency Range 60 - 50 Hz
Efficiency 88% Typical

Power Connector Specification
24 Pin ATX 1x (Non-Modular Cable)
EPS (CPU) 1x 8-pin (4+4) (Non-Modular Cable)
PCIE 4x 8-pin (6+2) (Non-Modular Cable)
SATA 8x (Modular Cable)
4-Pin Peripheral 6x (Modular Cable)
Floppy 1x (Modular Cable)

General Specification
Operating Temperature 0C - 40C
MTBF 100,000 Hours
Size 85mm (H) x 150mm (W) x 140mm (L)
Fan Size 120mm Hydro Dynamic Bearing
Warranty 3 Year

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Delivery Options

Next Working Day Delivery

Get your order delivered the next working day for £5.99, available when ordering Monday - Thursday and before 17:00 on that day if the product is in stock and your payment has cleared.

Pre 12 Next Working Day Delivery

Get your order delivered the next working day before 12:00pm for £8.38, available when ordering Monday - Thursday and before 17:00 on that day if the product is in stock and your payment has cleared. Some orders if via PayPal and the first customer order may not clear in time.

Weekend Delivery - Saturday & Sunday

If you need your order at the weekend, for £9.98, you can specify the day you wish to have it delivered to you, Saturday or Sunday providing your order has been placed by 17:00 on the Friday before.

Economy Delivery

Economy delivery is available on all orders of any value being shipped within the UK.

About Coolermaster

Cooler Master was founded with the mission of providing the industry's best thermal solutions. Since its establishment two decades ago, the company has remained faithful to this mission, emerging as a world leader in products and services for companies dealing with devices where heat issues must be resolved.

Cooler Master's vast product range covers Cases, Power Supplies, Cooling units, Keyboards and more.

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