Let’s take a look at this entry-level 650 W power supply from Seventeam that carries the 80 Plus Bronze certification.

Seventeam ST-650PWL power supplyFigure 1: Seventeam ST-650PWL power supply

Seventeam ST-650PWL power supplyFigure 2: Seventeam ST-650PWL power supply

The Seventeam ST-650PWL is 5.5” (140 mm) deep, with a 120 mm dual ball bearing fan (Protechnic Magic MGA12012XB-025) on its bottom part.

The reviewed unit doesn’t have a modular cabling system, and the cables don’t have nylon sleeves. The power supply comes with the following cables:

  • Main motherboard cable with a 20/24-pin connector, 16.1” (41 cm) long
  • One cable with two ATX12V connectors that together form an EPS12V connector, 20” (51 cm) long
  • Two cables with one six/eight-pin connector for video cards each, 16.5” (42 cm) long
  • Two cables with three SATA power connectors each, 14.2” (36 cm) to the first connector, 5.9” (15 cm) between connectors
  • One cable with three standard peripheral power connectors and one floppy disk drive power connector, 14.2” (36 cm) to the first connector, 5.9” (15 cm) between connectors

All wires are 18 AWG, which is the minimum recommended gauge, except the +3.3 V (orange) and +5 V (red) wires on the main motherboard cable, which are thicker (16 AWG), which is always nice to see.

The number of cables and connectors is compatible with an entry-level 650 W unit. We’d prefer to see four video card cables, which would allow you to install two high-end video cards at the same time without the need for adapters. The reduced number of peripheral power connectors may be a problem.

Seventeam ST-650PWL power supplyFigure 3: Cables

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


Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.