Reviews - Seasonic Platinum 1000W
Sample Provided by: (By OklahomaWolf on Fri, Nov-18-2011)

Page 1 - First Look

My... precioussssssssssssssssssssss....

Sorry, I seem to have gone all Gollum on you for a moment there. But look at the above picture, can you blame me? My readers and I have been waiting for this day a long time now. Ever since Seasonic announced that they were working on a new line of awesomeness at the 80 Plus Platinum certification level, yours truly and everyone else has been drooling lakes and rivers waiting for those mythical units.

Well, drool no more. The day is finally here. Today I have a Seasonic Platinum 1000 on my hands, and it's going to get tested.

Naturally, this review starts up with some box pictures. And this one is crammed full of marketing to talk about. Let's get this over with, shall we?

  • Ultra High Efficiency, 80 PLUS® Platinum Certified (
    Sea Sonic's corporate slogan "Green Innovation Powers Your Life" defines our commitment to the design and production of the most eco-friendly power supply units on the market today. The 80 PLUS® Platinum certification defines efficiency rating of greater than 90%, 92%, 89% efficient at 20%, 50% and 100% operating loads, respectively. The Sea Sonic Platinum Series represents the highest level of technology and efficiency achieved by Sea Sonic to date through 35 years of commitment to engineering excellence.
    -This stands in contrast with my own corporate slogan: "Insanity Defines Progress."
  • Seasonic Patented DC Connector Panel with Integrated Voltage Regulation Module*
    Seasonic's patented full modular design minimizes voltage drops and impedance, maximizes efficiency and cooling, enhances overall performance and reliability.
    *Patent Pending: US, CN, JP, TW, & DE
    -Again, impedance is a function of AC power. Since we're talking about DC here, the correct term is resistance. DC knows all about resistance. But enough about congress. Badumbum-tssh.
    • Minimizes line resistance and voltage drops to maximize efficiency.
    • Reduces overall component count to better space utilization for optimal airflow, heat dissipation and cooling.
    • Extensive use of SMD technology for overall quality and reliability improvement.
      -Hmm... either they're talking about surface mount devices or sugary microscopic donuts. Either way, it's all good.
    • Simple and ingenious design for a "clean" layout to achieve unsurpassed quality and performance.
  • Tight Voltage Regulation [± 2%]
    Improves load regulation and reduces voltage variations to provide smooth and stable operations.
    -Hear that? Our triple bypasses from eating all those little donuts will go a little more smoothly now.
  • Seasonic Hybrid Silent Fan Control - S²FC & S³FC*
    An industry first, advanced 3 phased thermal control balances between silence and cooling. The Hybrid Silent Fan Control provides 3 operational stages: Fanless, Silent, and Cooling Mode. In addition, a selector switch is provided to allow you to select between the Seasonic S²FC fan control, without fanless mode or the S³FC fan control, with fanless mode.
    *Patent Pending: US, CN, JP, TW, & DE
    • Reduces noise without increase in temperature.
    • Extends fan life by eliminating unnecessary rotation.
    • Optimizes heat dissipation at all times.
    • Fanless mode (0 dBA) provides unsurpassed silent performance.
  • Sanyo Denki - San Ace Silent Fan
    The world-reknowned Sanyo Denki ball bearing fans are made of the highest quality components to ensure maximum quality and performance. The use of spoon shaped high-density plastic fan blades with smooth leading edges, strict tolerance ball bearings and precision copper axel are just some features to ensure ultra low noise performance and quality. In addition, the fan uses 3 balancing points, instead of the industry standard of 2 points, to ensure perfect balance and rotation. The Sanyo Denki fan is a perfect match to the class leading Sea Sonic Hybrid Silent Fan control for the absolute top performance of the industry.
    -So... you're saying this unit has a fan for cooling, then? Sounds crazy enough to work.

Ok, enough smart alecky comments. Here's the side of the box with a load table and some other useful specs.

Hooray! Unpacking time!

Lots of goodies come with one of these. A power cord, user guide, velcro cable ties, zip ties, screws, a case badge, and a bag of modular cables. Not to mention the power supply itself, nestled in a velvet bag.

Here's the user guide. Not too useful, as most of it is crammed full of marketing, but it has all the basics.

The power supply itself is done in a rather lovely two tone matte gray. One of the better looking ones I've seen in quite a while, I have to say.

A look from this angle shows us a blue sticker intended to be removed before operation. It tells you what the fan control switch does. The same info is printed on the casing underneath, so I'm not sure exactly what purpose the sticker serves. Perhaps it's just a reminder that this unit does have a fanless mode, depending how you set the switch.

Nice, big power switch on this beast. I like it. The smaller ones can sometimes fail, and don't usually handle as much power.

A look at one of the sides.

The view from the top. That's a 120mm fan, by the way.

The label. As you can see, thanks to the VRM approach again, this bad boy can push up to 83A through the single 12V rail alone. Nice.

Seasonic SS-1000XP

+3.3V +5V +12V -12V +5VSB
25A 25A 83A 0.5A 3A
Max Power
125W 996W 6W 15W

There's that blue sticker again. It's actually blocking a couple modular connectors, so you should indeed remove it before use.

For load testing, I've decided to go with normal mode. Fanless modes don't usually last long in the hot box, anyway.

Since this unit is fully modular, there are a lot of cables that can be jacked in. Here's a table:

Type of connector: Seasonic
Modular Cables
ATX connector (590mm) 20+4 pin
4+4 pin EPS12V/ATX12V connector (650mm) 1
8 pin EPS12V connector (650mm) 1
6+2 pin PCIe (600mm) 6
5.25" Drive (550mm+150mm+150mm) 6
5.25" Drive (350mm+150mm) 2
5.25" - Dual 3.5" Drive (140mm) 1
SATA (530mm+150mm+150mm) 9
SATA (350mm+150mm) 2
Unit Dimensions (L x W x H)
190mm x 150mm x 86mm



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