BitFenix is a company that became known for their unique, yet cost-effective computer case designs. The company was initially focused solely on PC cases, but quickly expanded their products portfolio to include other related products, such as case modding items, fans, and power supply units. A little over a year ago we reviewed two of their first PSUs, the BitFenix Whisper M 450W & 850W units, which we found to be both capable and competitively priced.

For today's review  we are taking a look at the latest addition to the company's PSUs lineup, the Formula Gold 650W PSU. As its name suggests, the Formula Gold series comes with an 80Plus Gold efficiency certification, with a long list of impressive features and rather bold quality assurance assertions on its marketing sheet. BitFenix claims that it is one of the most cost-effective 80Plus Gold units in the market, though with a retail price of $80 for the 650W version, it faces some aggressive competition amongst other 80Plus Gold designs. Ultimately this is a PSU with both its advantages and shortcomings, as we'll see in this review.

Power specifications ( Rated @ 50 °C )
AC INPUT 100 - 240 VAC, 50 - 60 Hz
RAIL +3.3V +5V +12V +5Vsb -12V
MAX OUTPUT 20A 20A 54A 2.5A 0.3A
105W 650W 12.5W 3.6W
TOTAL 650W

Packaging and Bundle

BitFenix supplies the Formula Gold 650W PSU in a typical cardboard box, with thick walls that offer ample shipping protection. Inside the box, we found the unit well-protected in polyethylene foam pieces. The artwork is mostly black, with abstract geometric shapes forming a partial triangular mesh and a close-up picture of the PSU itself. Abundant information regarding the unit's main features and performance is printed on the sides and rear of the box, in multiple languages.

In an effort to keep the cost as low as possible, the company reduced the bundle to the absolute essentials. We only found the necessary AC power cable, four black mounting screws, a few zip ties, and a basic manual inside the box. There are no other items or cables, as this particular PSU has all of its cables hardwired to the chassis, none are removable.

BitFenix Formula Gold 650W
Connector type Hardwired Modular
ATX 24 Pin 1 -
EPS 4+4 Pin 1 -
EPS 8 Pin 1 -
PCI-E 6+2 Pin 4 -
PCI-E 8 Pin - -
SATA 8 -
Molex 4 -
Floppy - -
The BitFenix Formula Gold 650W PSU
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  • negar2000 - Sunday, June 17, 2018 - link

    thanks for the comment Reply
  • rocky12345 - Monday, June 18, 2018 - link

    It looks like a fairly good entry level power supply that will not destroy your equipment at a decent price but I am sure there are other brands out there in the same price point that are just as good or better.

    I happen to like Seasonic & InWin power supplies since they both build their own power supplies. Unlike a lot of the others that also sell power supplies under their own names. Not saying any of them are bad or good but am saying I would just rather buy form the company that actually builds them and that's just my own thoughts & opinion on it.
    Reply
  • leonette - Wednesday, July 04, 2018 - link

    There something specific to switch mode design that makes lower voltage hurt? I'd always assumed it the difference was due to the 4x higher I^2*R resistive losses on the input end.

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  • leonette - Thursday, July 05, 2018 - link

    There something specific to switch mode design that makes lower voltage hurt? I'd always assumed it the difference was due to the 4x higher I^2*R resistive losses on the input end.

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