The new Silencer Mk II power supply series from PC Power & Cooling features a synchronous design with DC-DC conversion, single +12 V rail, 80 Plus Silver certification, and seven-year warranty. We’ve already tested the 750 W version and it proved to be an excellent product. Let’s see if the 650 W model is also a good option.

The power supplies from Silencer Mk II series are manufactured by Highpower.

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Figure 1: PC Power & Cooling Silencer Mk II 650 W power supply

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Figure 2: PC Power & Cooling Silencer Mk II 650 W power supply

The PC Power & Cooling Silencer Mk II 650 W is 6.3” (160 mm) deep, using a 135 mm fan on its bottom. This fan is a Globe Fan RL4Z-B1352512H, which is a ball-bearing fan with a maximum rotation of 1,500 rpm and a maximum airflow of 106.86 cfm.

This unit features active PFC, of course, and following PC Power & Cooling tradition, it doesn’t come with a modular cabling system. In fact, OCZ, the owner of PC Power & Cooling, decided to keep units with a single +12 V rail and no modular cabling system under PC Power & Cooling brand, while selling power supplies with modular cabling systems and multiple +12 V rails under their own brand. The cables included are the following:

• Main motherboard cable with a 20/24-pin connector, 19.3” (49 cm) long
• One cable with one ATX12V connector, 23.2” (59 cm) long
• One cable with one EPS12V connector, 23.2” (59 cm) long
• One cable with one six/eight-pin connector for video cards, 23.2” (59 cm) long
• One cable with one six-pin connector for video cards, 23.2” (59 cm) long
• Two cables, each with four SATA power connectors, 15.7” (40 cm) to the first connector, 5.5” (14 cm) between connectors
• Two cables, each with three standard peripheral power connectors and one floppy disk drive power connector, 23.2” (59 cm) to the first connector, 5.1” (13 cm) between connectors

All wires are 18 AWG, except the orange (+3.3 V) wires in the main motherboard cable, which are thicker (16 AWG).

The cable configuration is satisfactory for a 650 W power supply, however it would be nice if the manufacturer had added two more video card power connectors in order to allow you to install two video cards that require two auxiliary power connectors each.

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Figure 3: Cables

Let’s now take an in-depth look inside this power supply.