Seventeam ST-650P-AF Power Supply Review

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Seventeam is slowly entering the US market and ST-650P-AF is one of the power supplies from this brand that can be found here in the USA. Is it a good product? Can it deliver its labeled power? Check it out.

Seventeam P-AF and Z-AF series are internally identical, with the difference being the presence of a modular cabling system on Z-AF. So while we tested ST-650P-AF, the results are also valid for ST-650Z-AF. Both models are 80 Plus Bronze certified, meaning a minimum efficiency of 82% under light (20% i.e., 130 W) and full loads (650 W), and minimum efficiency of 85% while delivering half of the labeled wattage (i.e., 325 W). Seventeam also advertises this power supply as having Japanese capacitors inside, while we discovered that this isn’t entirely true (more on this later).

New models from SilverStone Element series (ST65EF, ST75EF and ST85EF) are in fact Seventeam P-AF power supplies. So numbers from this test can also be used for evaluating SilverStone Element ST65EF. It is very important to notice that other models from this series are manufactured by FSP and not by Seventeam.

We also have reviewed the 750 W version from P-AF series and it uses a different project; so the 750 W model is not a 650 W model with “stronger” components.

Seventeam trademark is the sticker in Engrish saying “Breakage Invalid” instead of “Warranty Void if Broken.”

Seventeam ST-650P-AFFigure 1: Seventeam ST-650P-AF power supply.

Seventeam ST-650P-AFFigure 2: Seventeam ST-650P-AF power supply.

ST-650P-AF is only 5 ½” (140 mm) deep, being shorter than the 750 W model, which is 6 19/64” (160 mm) deep. This was accomplished by reducing the fan size from 135 mm to 120 mm.

Only the main motherboard cable is protected by a nylon sleeving, which comes from inside the power supply housing. Cables are somewhat long, measuring 20 ½” (52 cm) between the housing and the first connector on the cable, and 5 ½” (140 mm) between connectors on cables with more than one connector. All wires are 18 AWG, which is the correct gauge to be used, except the +3.3 V (orange) wires on the main motherboard connector, which are thicker (16 AWG).

The cables included are:

  • Main motherboard cable with a 24-pin connector (no 20-pin option).
  • One cable with two ATX12V connectors that together form one EPS12V connector.
  • Two auxiliary power cables for video cards with one six/eight-pin video card auxiliary power connector each.
  • Two SATA power cables with three SATA power connectors each.
  • One peripheral power cable with three standard peripheral power plugs each and one floppy disk drive power connector.

This is practically the same configuration found on ST-750P-AF. The only difference is the presence of one additional cable containing three peripheral power plugs on the 750 W model.

Seventeam ST-650P-AFFigure 3: Cables.

Now let’s take an in-depth look inside this power supply.

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Author: Gabriel Torres

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.

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