Seasonic Platinum-1000 1 Kilowatt Power Supply Review

Seasonic breaks the Platinum efficiency barrier with its new 1 kilowatt computer power supply. We generally know if it has Seasonic branding, it is a good PSU. But we all want to know if it is a great PSU. We all know that Seasonic means "quiet" as well and believe it or not this PSU can be dead silent.

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Overview

The first thing we are going to look at with the Seasonic Platinum-1000 is its packaging, accessories, and documentation. While normally none of these items are 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 packaging of the Platinum-1000 follows the general layout we have been seeing from Seasonic lately. This packaging, however, is trimmed out in a Platinum-color for, well I guess, the fact that it is supposed to be an 80Plus Platinum rated power supply. Skipping right on ahead to that point, when we check the 80Plus website we do indeed find that 80Plus has certified this unit for 80Plus Platinum. How this unit will actually fare in this regard we will see later. Interestingly, the front of the package has an SLI seal on it, but a check of the SLIZone webpage at the time of writing does not find the unit listed as being certified for SLI. Additionally, when we look at the CrossFireX webpage we see that the unit is not listed there either. Moving around, the rest of the Platinum-1000's packaging, we find the power table (reproduced below) and the connector count (reproduced below). On the back of the package, we find a lot of advertising including a description of how the fan controller in this unit is supposed to work. Lastly, we see that the unit is covered by a 7 year warranty from Seasonic which is excellent.

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The power information for the Seasonic Platinum-1000 is very much what we would expect to see from the general trend of power supplies over the last few years and from previous units from Seasonic. Starting things off, we find that the unit has a single 12v rail with a 12v capacity of up to 83A or ~100% of this unit's DC output capacity if necessary. When we look at the minor rails, we see that they are capped at 125W and each rail is individually capable of 25A. Paired with this output arrangement, we find the Platinum-1000 has 6 modified 8-pin PCI-Express connectors, 8 Molex connectors, and 11 SATA connectors. This arrangement is certainly enough for the vast majority of users and seems well appointed given the market segment this unit is filling and the general specifications the unit carries. It does, however, trail the recent Corsair HX1050 a bit here when it comes to peripheral connectors but most people will not use 8 Molex connectors these days let alone the 12 that were on the HX1050.

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Once we open the Platinum-1000, we find the usual assortment of items that come with a Seasonic power supply including the power supply in a bag, mounting screws with Seasonic case badge, modular cables in a bag, the power cord, the user manual, and the warranty card. The user manual that comes with the Platinum-1000 covers both this model and the 860W model in this line. It is 54 pages long in eight languages. Included in the manual is the power table for both Platinum units, the connector count for both units, installation instructions, some troubleshooting instructions, and the warranty information. On the power table for the unit, we find the operating temperature is listed as 50C, so we are going to assume that this unit is rated for full power at 50C. Lastly, the exposition on the Fan switch is constrained to a single line indicating, well, exactly what the label on the power supply says. One setting will enable fanless mode/fan mode (Hybrid) when the power supply is at low load. The other setting (Normal) has the fan active all the time bypassing the low load fanless mode of the Hybrid setting. Overall, the manual is once more very serviceable and very good.