Seasonic FOCUS PLUS Gold 850W Power Supply Review

Seasonic's new high efficiency enthusiast computer power supply claims to be silent through 425 watts of power delivery. An improved fluid dynamic bearing fan helps with this. The Focus sports a cable-free connection panel, and has an industry leading 10 year warranty. And this unit was sourced out of retail stock, just like you would buy.

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Overview

The first thing we are going to look at with the FOCUS PLUS Gold 850W is its packaging, accessories, and documentation. While normally none of these items is a make or break item for a power supply the packaging quite often contains a lot of information about the product we are purchasing. The inclusion of an owner’s manual that provides actual information about our product is also of great help. Accessories are almost unnecessary with a power supply as the unit is self contained, unless it is modular, but there are cases where a manufacturer can include useful accessories to make installation, routing, and use more efficient.

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The FOCUS PLUS Gold 850W packaging is definitely different from what we have been seeing recently from the Seasonic PRIME series of power supplies we have reviewed. Whereas the PRIME packaging has been somewhat refined to understated, the FOCUS PLUS Gold 850W packaging is bold and striking with its presentation. The front of the packaging features a large black triangle and then a burst of gold that fades across the packaging in multiple directions. That said, the only thing of note that we find on the front of the packaging is the 80 Plus Gold seal. A quick check of the 80 Plus website shows that this unit is indeed certified for 80 Plus Gold levels of efficiency (how it actually performs is something we will see shortly). When we flip to the rear of the packaging, we find a bunch of advertising about the unit including things like voltage regulation, efficiency, topology, fan design, etc. We also find the warranty listed here and it looks as if the FOCUS PLUS Gold 850W is sporting a 10 year warranty which is very long for a product that is not in the flagship realm. Moving on to the sides of the packaging, we find the power label (reproduced below), the connector counts (reproduced below), and finally a picture of the unit itself.

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The FOCUS PLUS Gold 850W is advertised as being a single 12v rail power supply similar to what we saw from most previous Seasonic power supplies. Today's FOCUS PLUS Gold 850W's 12v rail has a capacity of up to 70A (or ~99% of the unit's capacity) if necessary. The minor rails (5v and 3.3v) each have a capacity of 20A and the combined capacity of those two rails is 100W. All of these values are similar to what we have been seeing from the majority of Seasonic's 850W products for a while now. Combined with these outputs, we find that this unit has 6 PCIe connectors, 10 SATA connectors, and 5 Molex connectors. From a connectivity standpoint, this unit is more than on par with what we would expect from mid-range power supply as these values are identical to what we saw from the various PRIME 850W units we recently reviewed (1,2).

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Once we open the FOCUS PLUS Gold 850W packaging, we are left looking at the power supply itself, a power cord, some screws, the modular cables in a pouch, some zip-ties, some Velcro straps, and the user manual. The user manual is 12 pages long in 12 languages. Given how short that is and how many languages it covers you might question whether or not it is truly a user manual. Well, so do we as all that is included are the installation instructions and a tiny troubleshooting section. That is it and that is just not good documentation. Sure, lots of companies these days don't tell you much about your product but even by those standards this is subpar. In fact, this is just a waste of space and paper. Let's move on to look at the unit itself now in the hopes that things there are better than here.