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Seasonic Platinum-1200

Five Highly Efficient Power Supplies: 1200 W and Up
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We could not help but notice that the top model from Seasonic is almost identical to the Cooler Master V1200, which is not surprising since Seasonic manufactures both of them. Their technical specs are all but identical, and the internal layout proves that these two PSUs are twins. But there are minor differences: The number of connectors, cable lengths, and the fan switch’s labels, where we prefer Seasonic’s scheme (‘Hybrid’ and ‘Normal’) over Cooler Master’s. The Seasonic PSU has two SATA connectors more, but two PCIe connectors less and four Molex connectors less. Except from the motherboard cable, all cables are flat ones, and their lengths are similar to Cooler Master’s cables. Like the Cooler Master PSU there is a single 12 V rail which can supply up to 100 A.

AC Input100-240V, 50-60 Hz
DC Output+3.3V+5V+12V (#1)+12V (#2)+12V (#3)+12V (#4)-12V+5Vsb
25 A25 A100 An/an/an/a0.5 A3 A
Individual Output     6 W15 W
Rail UtilizationSysSysCPU & VGA
Combined Output125 W1200 W
Total Continuous Output1200 W
Peak Outputn/a

Efficiency According to the 80 PLUS Spec

Efficiency for Typical Use Cases

As expected, the similarities of the Seasonic and Cooler Master PSUs extend to the lab test. The minor differences which did show up can be attributed to parts and measurement tolerances. The Platinum-1200 rightfully bears its 80 Plus Platinum logo, and compared to the Cooler Master V1200, it is all but identical electrically. However, its hold-up time is much longer, thanks to larger capacitors. Ripple and noise are similar – perhaps the voltage curve on the Seasonic is slightly better.

Due to their identical genes, it is not surprising that the hybrid fan control behaves identical on both PSUs: At 40 and 200 W, the fan is off. But when it finally started up at 600 W, we were nonplussed by its noise – 42.7 dB(A) is inappropriate for a high-end PSU.

A Closer Look at the PCB

Since the Seasonic and the Cooler Master PSU are all but identical, there’s not much new to say. The primary capacitors do differ – while the Cooler Master V1200 contains one marked 390uF 420V and a few others marked 330uF 420V, all primary side capacitors in the Seasonic Platinum-1200 are marked 390uF 420V. We saw the effect of this change when we measured the hold-up times of both PSUs

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Top Comments
  • 12 Hide
    nikolajj , August 1, 2014 5:05 AM
    @blackmagnum

    Well, you don't seem to understand fully.
    They don't really consume more power than the connected hardware demands. On the other hand, they have an amazing efficiency rating, meaning that they use a minimum of power, and are therefore better for the planet. ;) 
Other Comments
  • 5 Hide
    Alex Kelly , August 1, 2014 1:09 AM
    Where is the EVGA Supernova P2 series? Would have been nice to see it included. :) 
  • 0 Hide
    kevith , August 1, 2014 1:40 AM
    Schön, dass Ihr auch deutsche artikeln jetzt schreibt. Das hätte ich mich nie gedacht. Aber was mit alle die amerikanischen leser? Die kann bestimmt kein deutsch?
  • 1 Hide
    damric , August 1, 2014 2:51 AM
    Much better PSU review than usual for THW.

    However, none of these PSUs are as interesting as the SF Leadex.
  • 0 Hide
    Alex Kelly , August 1, 2014 3:10 AM
    Quote:
    Much better PSU review than usual for THW.

    However, none of these PSUs are as interesting as the SF Leadex.


    Agreed! That's why I wanted to see the P2 here.
  • 12 Hide
    nikolajj , August 1, 2014 5:05 AM
    @blackmagnum

    Well, you don't seem to understand fully.
    They don't really consume more power than the connected hardware demands. On the other hand, they have an amazing efficiency rating, meaning that they use a minimum of power, and are therefore better for the planet. ;) 
  • 1 Hide
    mapesdhs , August 1, 2014 8:42 AM

    Pity the Thermaltake Toughpower XT Gold 1475W wasn't included, I've obtained
    half a dozen of them recently, excellent PSUs.

    Ian.

  • 2 Hide
    TheMentalist , August 1, 2014 8:56 AM
    Cooler Master really stepped up their quality in PSU's, can't ignore that.
  • 0 Hide
    lp231 , August 1, 2014 9:25 AM
    I still like the interior of my Antec TruePower Quattro 850w. Massive heatsinks!

    About that Antec 1300w PSU, according to their site, it says that has a "20+8-pin MBU socket for the needs of tomorrow."
    Do you guys have any info on this?
    http://store.antec.com/highcurrentpro/hcp-1300-platinum.html
  • 1 Hide
    majormajormajormajor , August 1, 2014 9:57 AM
    "At the time of writing, the website Plugloadsolutions.com only lists 7 Titanium-grade PSUs: Six models from a company called ‘Super Flower’ and the Corsair AX1500i"

    Wow, way to discredit yourself completely. You're reviewing power supplies and you've never heard of Super Flower?
  • -2 Hide
    Murissokah , August 1, 2014 10:09 AM
    Quote:
    Cooler Master really stepped up their quality in PSU's, can't ignore that.


    Not so sure about that. What they did was order a top model from Seasonic for their flagship power supply. No guarantees the rest of the product line will come from Seasonic. If they don't, as they never did in the past, then they will have no relation whatsoever with the flagship product. This is why I never buy power supplies from brands, only from the actual manufacturers.
  • 0 Hide
    TheMentalist , August 1, 2014 2:47 PM
    Quote:
    Quote:
    Cooler Master really stepped up their quality in PSU's, can't ignore that.


    Not so sure about that. What they did was order a top model from Seasonic for their flagship power supply. No guarantees the rest of the product line will come from Seasonic. If they don't, as they never did in the past, then they will have no relation whatsoever with the flagship product. This is why I never buy power supplies from brands, only from the actual manufacturers.


    True, but i was saying that compared to their other series, like the SilentPro and GX series. But still even if it's not from seasonic they bench pretty good.
  • 1 Hide
    RedJaron , August 1, 2014 2:52 PM
    I just don't get the idea of including a drawstring bag with the PSU. What's the point? It's not like we often pull them out of the case and carry them around. I buy one, I install it in the case, and it stays there ( usually for years, ) until either it dies or I move it to a new case for a build. You want to include a bag or case for the modular cables, that makes perfect sense.
  • -1 Hide
    O_Pgamer96 , August 1, 2014 6:47 PM
    Quote:
    Schön, dass Ihr auch deutsche artikeln jetzt schreibt. Das hätte ich mich nie gedacht. Aber was mit alle die amerikanischen leser? Die kann bestimmt kein deutsch?

    Ihr Browser eine ganze Seite nur durch den Nachweis der Einstellungen auf Ihrem PC in Ihre Muttersprache übersetzen. dies ist eine amerikanische Website.
  • -1 Hide
    O_Pgamer96 , August 1, 2014 6:49 PM
    und ja, ich verwendet, einen Übersetzer für die
  • -2 Hide
    O_Pgamer96 , August 1, 2014 6:57 PM
    the charts for typical use should be adjusted tfor these psus. they are not meant to be run at 500w and i dont think they are tested for such.
  • -4 Hide
    crisan_tiberiu , August 2, 2014 12:13 AM
    Everybody is talking about eficiency...but really? 1,2kW of power for a PC? no ty :) 
  • -2 Hide
    crisan_tiberiu , August 2, 2014 1:45 AM
    Whwn your lighs start to dimm in you neighborhood, you will know that "The guy" started to play Plants vs Zombies @ 4k in quad SLI/Xfirre ;) 
  • 3 Hide
    mapesdhs , August 2, 2014 2:04 AM
    Quote:
    Everybody is talking about eficiency...but really? 1,2kW of power for a PC? no ty :) 


    If you only build simple systems, sure, but many people build something very different. Max RAM, many
    drives, oc'd 6-core, 4-way SLI/CF, etc. Mine is like that, and it's not even a particularly way out example.
    Also depends what you're using it for. My quad-580 is for CUDA research, whereas my gaming PC is
    just a 4-core i7 with two 580s. I use the top-end PSUs for custom video editing systems so they can
    support 4+ GPUs for lots of CUDA power, etc.

    Ian.

  • 2 Hide
    Neospiral , August 2, 2014 6:52 AM
    Quote:
    "At the time of writing, the website Plugloadsolutions.com only lists 7 Titanium-grade PSUs: Six models from a company called ‘Super Flower’ and the Corsair AX1500i"

    Wow, way to discredit yourself completely. You're reviewing power supplies and you've never heard of Super Flower?


    I thought the same thing. Then I read this:

    "Using multiple graphics cards in a gaming PC is, however, a rare occurrence, as modern graphics cards are sufficiently powerful even for the most demanding games – there is simply no need for combining graphics cards via Nvidia’s SLI or AMD’s CrossFire."

    and the article went from suspect credibility to no credibility. Ignorant author is ignorant. Find another website to get a legit look at high wattage PSU's, apparently.

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