Visual inspection
The Supremo L2 Gold 650W has a minimalist design, with a matte black finish on all surfaces and a vertical grill covering the fan. The power supply has a length of 158mm and a width of 150mm, these are the standard dimensions used by most power supplies. The Supremo L2 Gold 650W also has flat cables, however these are not modular.
The sides of the power supply feature the SilentiumPC logo and brand name, embossed into the metal. This is a subtle way to not only advertise the brand, but also to add more depth to the look of the power supply.
The back of the power supply uses a honeycomb pattern to allow for air to be pushed out of the enclosure. On the right side, there are the AC slot for the power cable and the On/Off switch of the power supply.
The top of the case features the standard label which has all the technical information and the serial number of the product.
The cables of the Supremo L2 Gold 650W are flat and completely black. This will improve the look of the system, once the power supply is installed. However, the cables are not removable.
The fan used is manufactured by SilentiumPC, or so it is labeled, the model number: DF1202512SEMN is found on different fans with different impeller designs and specifications. The common result for this model number is the company Martech, and thus, we can presume that they are the manufacturer of the fan and bearing system.
The mechanism used is a Hydro Dynamic Bearing, and the fan control is done by the power supply. Thankfully, the fan is connected to the PCB using a standard 2 Pin connector, making the replacement easy.
The Supremo L2 Gold 650W is using a slightly modified SAMA platform found in other SilentiumPC power supplies, such as the Supremo FM2 or the Supremo M2. The passive cooling is done by a single metal heatsink, installed on the primary side.
Starting with the filtering at the back of the power supply. There are two ceramic Y-type capacitors and a single X-type capacitor. There is also a white plastic connector that is installed on the PCB making the connection.
The APFC section features a single capacitor made by Nippon Chemi-Con, the specifications of this capacitor are: 560uF/450v with a maximum operating temperature of 105°C.
The filtering continues on the main PCB with a pair of coils, a single fuse, X-type polyester capacitor, two small Y-type ceramic capacitors, and a relay.
The PFC (power factor correction) side of the PCB features two MOSFETs manufactured by Infineon and with the model number: IPP50R140CP. These two are attached to the heatsink and benefit from the direct passive cooling.
The PWM controller used is the EM8569A, manufactured by Excelliance MOS. It is installed behind the heatsink and next to one of the Infineon MOSFETs.
The 4-Channel Supervisor IC used on this power supply is the GR8329N, manufactured by Grenergy. This chip is designed to monitor the outputs of the power supply, while also being responsible for the protections of the unit.
The second PWM Controller is the APW7159C, made by Anpec. It is installed on a secondary vertical PCB, above two polymer capacitors. This PWM controller is responsible with supervising the DC-DC converters for both the +3.3 V and +5 V lines.
The Supremo L2 Gold 650W uses capacitors manufactured by Nippon Chemi-Con, these are part of both the KZE and KY series.