Page 3 - Physical Look - Inside
As usual, we proceeded to open up our Cooler Master V650 Gold V2 White Edition 650W so you do not have to. You can access the four screws from the fan side to gain access to the internals of the power supply. One of the screws is covered by a warranty seal, which is quite challenging to remove without tearing. I would highly advise you not to remove this seal as it will void your ten-year warranty. There is no reason to open up your power supply anyway, as there are no user-serviceable parts inside. Once the screws are removed, you are able to slide apart the top and bottom shell to get a good look inside as seen in the image above. The Cooler Master V650 Gold V2 White Edition 650W's OEM is Gospower, who also built the Cooler Master V850 SFX Gold 850W and Cooler Master MWE 650 White V2 650W, both of which my colleague Aaron Lai has reviewed. The main difference between this and the MWE 650 White V2 650W is the V650 Gold V2 White Edition 650W has sightly higher end components, higher efficiency rating, and is fully-modular. The build quality is good with a couple of globs of glue around the insides. The sides are shielded with a plastic shield to prevent shorts from any of the components within. There are two heatsinks, one on each side of the primary capacitor.
Starting at the transient filter stage, there are two X-capacitors and four Y-capacitors close to the AC receptacle. This is more than enough for both of these capacitors, which is nice to have. There are also two ferrite coils and a metal-oxide varistor here. The metal-oxide varistor helps with suppressing voltage spikes. A little further along the line, we can find an NTC thermistor, which is used to suppress high inrush currents.
Moving on, we find our single primary capacitor. This capacitor is a Toshin Kogyo LGW having a rating of 470uF at 450V. It also has a temperature rating of 105c. Although Toshin Kogyo is a Japanese company, they actually sell rebranded OST capacitors from Taiwan, which are not necessarily known for their quality. That said, cheaper power supplies may opt to use Chinese branded capacitors with an 85c temperature rating, which is probably not as good as the capacitor we have here today.
Continuing on, the Cooler Master V650 Gold V2 White Edition 650W uses two GBU1508 rectifying bridges. Each of them support 15A of current at 100c. At 115V, you can theoretically pull up to 3450W (15A * 2 diodes * 115V) from the bridge rectifier at 100% efficiency. Of course, this does not consider the fact that it is not 100% efficient nor the ability of every other component in the system to keep up. Moving on to the smaller heatsink, we can see two STMicroelectronics STF33N60DM6 MOSFETs. Each is certified for up to 16A at 100c. These MOSFETs have a maximum resistance of 0.115 ohm according to the manufacturer’s datasheet. This resistance is called Static Drain-Source On-Resistance, or commonly abbreviated as RDS(on). The more efficient the component is, the lower the RDS(on) value, as less power is wasted, while using a lower resistance. A Cree C3D16065 boost diode is placed directly beside them on the heatsink.
Other components that can be spotted on the primary side include a Champion CM6500UNX APFC controller and a Champion CM03AX energy-saving control IC.
Moving forward, we can see more capacitors rated at 105c. Aside from a couple of Rubycon capacitors, we find many more Nichicon capacitors. I find it strange how these are true high quality Japanese capacitors, but the primary capacitor is not. All rectifiers produce the +12V out, while the +5V and +3.3V outputs are generated from the +12V output using a DC-to-DC converter within as with modern high efficiency power supplies. Two Sanrise SRC60R140BTFE MOSFETs are responsible for generating the +12V output, located on one of the heatsinks. The SRC60R140BTFE’s rated continuous drain current is 11.2A at 125c. It has an RDS(on) value of 0.140 ohm maximum and 0.120 typical at 25c. Six InPower Semiconductor FTD05N03NA MOSFETs provide the +5V and +3.3V outputs, located on the daughterboard. The FTD05N03NA’s rated continuous drain current is 75A at 100c. It has an RDS(on) value of 0.006 ohm maximum and 0.004 typical at 25c. An ANPEC APW7159C is installed at the bottom of the daughter card as the PWM controller.
At the back, we have a larger daughterboard covering the majority of the rear panel for the modular cable sockets. All modular sockets at the bottom are soldered directly to the main PCB after the secondary stage to reduce power transmission loss. The output connector configuration can be seen on the previous page. Overall, the internal build quality of the Cooler Master V650 Gold V2 White Edition 650W is average. Components are arranged well for optimal cooling, aside from a wire routed across the board, and the solder points on its PCB are quite clean. However, there are occasional big globs of glue. The V650 Gold V2 White Edition 650W contains generally acceptable components, which are appropriate for its performance class. The datasheets for all components mentioned in this review can be found on their respective manufacturer's websites.
Lastly, we have a 135mm fan that provides cooling to the Cooler Master V650 Gold V2 White Edition 650W’s components. Although a 135mm fan may seem big, it is quite average for a power supply with a bottom mounted fan. The fan should be adequate for cooling this power supply. The fan is a Hong Hua HA13525M12F-Z, as shown in the photo above. From the label, you can see this fan operates at 12V and 0.36A and is rated to rotate at a maximum of 1800RPM.
Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion
