ES-800 (also known as BFGR800WESPSU) is a power supply using a different internal design called “frequency conversion,” with BFG claiming it provides higher efficiency even under very low loads. Is that so? Let’s check this out.

BFG ES-800 is manufactured by a company called Andyson, being the first power supply we’ve tested built by this manufacturer.

BFG ES-800 power supplyFigure 1: BFG ES-800 power supply.

BFG ES-800 power supplyFigure 2: BFG ES-800 power supply.

ES-800 is small for an 800 W unit, being 6 1/2” (16.5 cm) deep, using a 138-mm fan (which actually measures 130-mm) on its bottom and featuring active PFC, of course. It does not have a modular cabling system.

All cables are protected by a nylon sleeving that comes from inside the power supply housing, measuring 19 19/64” (49 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.

The cables included are:

  • Main motherboard cable with a 20/24-pin connector.
  • One cable with an EPS12V connector and one ATX12V connector.
  • Two auxiliary power cables for video cards with one six-pin video card auxiliary power connector and one six/eight-pin video card auxiliary power connector each.
  • Two SATA power cables with three SATA power connectors each.
  • Two peripheral power cables with three standard peripheral power plugs and one floppy disk drive power connector each.

This power supply has four power connectors for video cards, allowing you to install up to two very high-end cards in SLI or CrossFire mode, since each card from this class uses two power connectors. So no direct support for three-way SLI is provided. These four connectors are available in two cables, and we particularly don’t like this configuration. For better performance each connector should use an individual cable. The reason why is that when the power supply is fully loaded voltage on the connectors tend to drop when they share the same cable.

BFG ES-800 power supplyFigure 3: Cables.

Now let’s 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.