Introduction

When it comes to the PC Components and the peripherals particularly the PC Chassis and the PC Cooling, the name of Cooler Master needs no introduction and they are among the top-notch manufacturers. They carry the diverse lines of the products ranging from the power supply units, Chassis, air and water coolers, fans, keyboards, mouse, headsets etc.

Cooler Master Pakistan has sent us their MWE 650W Gold Fully Modular PSU for the review. This PSU has been designed to deliver consistent 90% efficiency, low temperatures, and quiet operation. High quality, heat resistant components have been used to achieve gold level performance at temperatures up to 45°C. It is built with APFC +PWM technology which enhances the product reliability and performance. It is fully modular which would ease the cables clutter. Since we don’t have the necessary testing equipment at the moment; we will be giving you an overview of the PSU.

  • Item:                     MWE GOLD 650W PSU
  • Manufacturer:       Cooler Master
  • Price:                    PKR 11300/- [At the time of the review]
  • Availability:          Shing

Specification

Packaging and Unboxing

The power supply comes inside a black color cardboard box. On the front side, the Cooler Master brand logo is printed on the top left. MWE Gold 650 is printed in large size font on the bottom left side followed by Fully Modular text. The unit meets the 80 plus Gold certification for 230V EU. The picture of the unit is on the right side main section. The Cooler Master is offering 5 years of warranty on this unit.

The backside of the packing box has salient features of the unit printed in 8 different languages. The Cooler Master brand logo is printed on the top left. MWE 650 Gold is printed on the top right. There are two graphs on the right side showing the fan curve and efficiency. Even at full load, the efficiency is somewhere between 85% to 90%. The full 90% is achieved at 50% of the load. Even at full load, the maximum noise level of the fan is 35 dBA as per Cooler Master in-house testing with maximum RPM sitting somewhere between 2300 to 2500.

The left side of the box has the specifications of the PSU printed in the tabular format. Power table is printed under the specification. There is a Cooler Master brand logo printed on the top left and MWE 650 Gold Fully Modular is printed on the right.

The right side of the box has Cooler Master brand logo printed on the top left and MWE 650 Gold Fully Modular on the top right. The main section has pictures of the connectors and their quantity. A serial no sticker is pasted at the bottom left. The EAN and UPC info labels are printed on the bottom right.

The top side of the box has a plain surface in black color with the Cooler Master brand logo printed on the top left and MWE 650 Gold Fully Modular printed at the bottom right.

The bottom side of the box has MWE Gold 650W Fully-Modular – Power Supply printed in 24 languages. The company’s contact information is printed on the far right side. The compliance information to various regulations is printed at the bottom.

There is a black color Styrofoam pad covering the contents of the box. Taking it off will show the cables nicely packed on the right side whereas the unit is placed inside the Styrofoam padding.

Accessories

There is not much content in terms of the accessories in this box. We have a user guide, 4 screws and the standard power cable.

Closer Look

The Cooler Master MWE Gold 650 Fully Modular follows the Intel Form Factor of ATX 12V V 2.31. It has a dimension of 160 x 150 x 86mm. The input voltage range is 100-240Vac. Input frequency range is 50/60 Hz. Power good signal is 100 to 500ms. Hold up time is > 14ms. Efficiency is 90% at typical load. MTBF is >100,000 Hours. Operating temperature is 0~45°C. The unit has basic protection features of OVP / OPP / OTP / SCP / UVP. The unit conforms to CCC, CE, TUV-SUD, RCM, EAC, cTUVus, FCC, BSMI, KC, CB regulations.

Here is what Cooler Master is saying about it, “Behold the 80 Plus Gold rated, fully modular MWE Gold. This power supply unit delivers consistent 90% efficiency, low temperatures, and quiet operation. High quality, heat resistant components have been used to achieve gold level performance at temperatures up to 45°C. The Silencio fan and exclusive LDB bearing provide nearly silent cooling at no loss to system performance and a longer lifespan. Flat cables improve airflow by reducing cable bulk and a single +12V line ensures all components are fed the same stable output regardless of which cable you use. Be bold, power with gold.”

The top side of the PSU has a 120mm fan for cooling the circuitry of the PSU. There is a warranty void label pasted on one of the screws removing which void the warranty. There is a grill covering the fan which has Cooler Master brand logo in the middle. The thermally controlled 120mm HDB fan operates smoothly without friction. This fan has sealed LDB bearing which is combined with Silencio fan technology for quiet cooling with a longer lifespan. This is self-lubricating, dustproof design having IPx6 certification and 160,000 hrs of MTTF. The fan features the silent driver IC reduces clicks and vibrations. There are 5 impellers designed to meet high static pressure requirements.

This side of the unit has a large size-sticker pasted on it. The stick has a black background with black/white stripes design on the top and at the bottom. The Cooler Master brand logo is printed on the left side. The MWE Gold 650 Fully Modular is printed on the right side. The overall design of the sticker stands the unit out and looks impressive.

This side of the unit has the power info label pasted on the complete area. 650W is printed on the top left followed by the model of the unit which is MPY-6501-AFAAG. This is a switching power supply with active PFC and has 80 Plus Gold certification. A serial no sticker is pasted at the bottom right. The power table is printed under the model no of the unit. +12V is rated at 54.1A with a decent Amperes on the +3.3V and +5V outputs.

The bottom side of the unit has a solid surface in black color. The bottom side of 4 screws could be seen here.

The rear side of the unit has perforated/vented area covering the circuitry and the fan ensuring enough ventilation for the unit to remain cool under load. We have a power on/off button on the right side followed by the 3-pin power connector.

The front side has the connectors laid out in two rows with clear labels. The top row has 18+10-pins ATX connectors followed by two IDE/SATA 6-pins connectors. The second row has 3x 8-pins CPU/PCIe connectors followed by the 2x 6-pin IDE/SATA connectors.

This unit has all the cables in flat design except the 12-pin ATX cable which is cluttered in a single sleeve making it bulky to operate. Connectors’ info is as under: –

Connector Quantity Length of the Cable
MB 20+4 Pin 1x 610mm
CPU 12V 4+4 Pin 1x 650mm
PCIe 6+2 Pin 4x [Two on a single cable] 720mm
SATA 8x [Four on a single cable] 760mm
Peripheral 4 Pin 6x [Three on a single cable] 760mm
FDD Cable 4 Pin 1x

 

 

As the computer is comprised of multiple sophisticated circuits, it necessitates one to ensure uninterrupted availability of different stable voltages i.e. +5V, -5V, +12V, -12V, 3.3V etc at respective terminals of a power supply. In addition to consideration of stable voltages, current requirements also change on runtime – gets steered by the load connected at the output stage of the power supply. But that consideration of parameters does not end only in voltage and current requirements, it stretches up to the features like harmonic factor, cross load regulation, noise resilience and other safety parameters including overvoltage protection OVP and overcurrent protection OCP etc to ensure the optimized and standardized provision of power to PC. The MWE Gold’s full-bridge design coupled with LLC, Synchronous, and DC to DC topology technologies offer reliable and stable voltage outputs. Here is the output table of the unit:

Unfortunately, our colleague who has been doing circuit overview is not available hence we will not cover the circuit overview at this time. We will revisit this content as soon as he becomes available for the task and update this content accordingly.

Testing

As we don’t have the necessary equipment to measure the performance of the PSU particularly its waveforms to determine to true performance potential, we will be doing simple software-based monitoring of the voltages under the load to see if there is any abnormality followed by a test using the Thermaltake PSU Tester.

Following test bench was used for this purpose:

  • Intel i7 6850k [4.3GHz at 1.350V]
  • Noctua NH-U12S
  • Asus ROG Rampage V Edition 10
  • Ballistics Elite 4x4GB @ 3000MHz
  • Nvidia GTX 1080 FE
  • Samsung 840 EVO 250GB SSD
  • Seagate 2TB Barracuda
  • WD 6TB Black

AIDA64 was used to stress the components at a time for 15 minutes and voltages were monitored using the HWMonitor on Microsoft Windows 10 x64 1709. The maximum value on the +5V was 5.000V, on +3.3V was 3.328V, and on +12V was 12.192V with minimum value on the +5V being 4.920V, on +3.3V being 3.248V and on +12V being 12.000V. All these values are well within the Intel ATX 12V V2.31 standards.

Thermaltake Dr. Power II has the functionality to test the ATX 20+4 pin, CPU 4+4 pin, PCIe 6 or 8 pins, SATA, and peripheral connectors and report the corresponding voltages by putting a load on the PSU. It also has the ability to report the issues with the PSU. The reported voltages need to be compared with the Intel Standard and the Measuring Range of the testing equipment. Below mentioned table have the Intel Standard, Measuring Range and the Reported Voltages:

All the tested voltages fall within the Intel’s standard. Here are the connectors’ wise reported voltages:

Connector Reported Voltage (V)
ATX 24-Pin +11.9
CPU 4+4 Pin +12V +11.8
PCIe 6/8 Pin +12V +11.9
Peripheral +5.01, 3.3V
SATA +5.01, 3.3V

 

Conclusion

The Cooler Master MWE Gold 650 is a mid-range power supply having the 80 plus Gold certification for the 230V EU. The unit has a dimension of the 160mm(L)x150mm(W)x86mm(H). It is fully modular making it a more compelling unit to powering your system. The input voltage range is 100-240Vac. Input frequency range is 50/60 Hz. Power good signal is 100 to 500ms. Hold up time is > 14ms. Efficiency is 90% at typical load. MTBF is >100,000 Hours. Operating temperature is 0~45°C. The unit has basic protection features of OVP / OPP / OTP / SCP / UVP. The unit conforms to CCC, CE, TUV-SUD, RCM, EAC, cTUVus, FCC, BSMI, KC, CB regulations. The model no is MPY-6501-AFAAG.

Connectors included in the packing box are 1x 20+4 Pin Motherboard connector, 1x 4+4 Pin CPU connector, 2x 6+2 Pin PCIe connectors, 8x SATA connectors, 6x 4-Pin Peripheral connectors, 1x FDD Cable 4-Pin. The PSU has a single +12V rail with 54.1A on it making the power output of 649.2W.

The differentiating factor for this PSU is the provision of the Active power factor correction circuit. The MWE Gold’s full-bridge design coupled with LLC, Synchronous, and DC to DC topology technologies offer reliable and stable voltage outputs. This unit is featuring a 120mm fan having a sealed LDB bearing which is combined with Silencio fan technology for quiet cooling with a longer lifespan. This is self-lubricating, a dustproof design having IPx6 certification and 160,000 hrs of MTTF. The fan features the silent driver IC reduces clicks and vibrations. There are 5 impellers designed to meet high static pressure requirements.

This PSU has a price of the PKR 11300/- at the time of the review. This price and the provision of the Active Power Factor Correction circuit, with fully modular design and 80 Plus Gold certification makes this PSU ideal for the mid to high range PC builds. Cooler Master is providing 5 years warranty on this unit but Shing is offering a 1-year warranty on this PSU. As our colleague who has been doing the circuit overview is not available for time being, we will be re-visiting this content in coming time to update the closer look section with the detailed overview of the PCB. My personal experience using this PSU on my test bench with i7 6850k and GTX 1080 FE and couple of other builds featuring i7 8700k OCed 5.0GHz using 1.370V and RTX 2070/2080 has been satisfactory and I did not observe any glitch or power limiting coming from the PSU. Hence, based on my personal experience, this unit has my recommendation.