Corsair HX1200 PSU Review

Cross-Load Tests & Infrared Images

Our cross-load tests are described in detail here.

To generate the following charts, we set our loaders to auto mode through our custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The regulation deviations in each of the charts below were calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature was between at 30°C (86°F) to 32°C (89.6°F).

Load Regulation Charts

Efficiency Chart

This is a highly efficient power supply. It's able to achieve greater than 92% efficiency in the 300W to 650W load range, with the minor rails delivering up to 75W load at the same time. In the majority of its operating range, this PSU delivers between 90-92% efficiency.

Ripple Charts

Infrared Images

We applied half-load for 10 minutes with the PSU's top cover, along with its cooling fan, removed before taking photos with our modified FLIR E4 camera that delivers 320x240 IR resolution (76,800 pixels).

The temperatures inside of Corsair's HX1200 are pretty low considering we applied 600W to it for 10 minutes. The bridge rectifiers are at around 66°C, the APFC FETs at 57°C, the primary FETs at 58°C-60°C, the bus bars on the +12V board at 73°C, and the hottest components look to be the FETs of the VRMs that handle the minor rails, at close to 84°C.

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  • davidgirgis
    In the Conclusion, 'TO' should be 'To'; and 'demands' should be 'depends'; and 'product' should be 'protect'.
  • grozzie
    Not another plug/connector change!. I, like many people on this site, build custom PC's, part of which includes sleeved cables. One bug bear is 2 wires into 1, which is a in in the arse. I personally like the HXi series of Corsair PSU's which only have one such connection. I also think the 24 pin ATX supply is outdated and needs revision. I can't see the point of supplying motherboards with 3.3 and 5v rails. If only 12v was supplied with any or all voltage reduction made on board life would be so much simpler and neater. By providing more noise reduction at source (the PSU) gives Motherboard manufacturers an open cart to reduce the quality of voltage regulation i.e capacitor quality, on the motherboard. Is there really a need for another PSU on the market?
  • panathas
    On the specifications table it says: "Efficiency: 80 PLUS Gold, ETA-B", which is wrong since this is a Platinum PSU.
  • Aris_Mp
    yes we didn't pay much attention to the 80 PLUS efficiency certification :)
  • 10tacle
    ^^What are you talking about? Register and get on Corsair's support forums:

    https://sso.corsair.com/idp/AuthnEngine#/authn

    Of course they have a customer support phone number: 888-222-4346 (North America customers).

    Anyway, back on topic, first the $#@! miners have negatively impacted our GPU market, and now they may negatively impact our PSU market. :fou: What makes this really aggravating is that the PSU makers really can't prove a PSU was used 7x24 for heavy mining operation.

    Worse, even if PSU vendors like Corsair offer a mining-specific PSU for less money with just say a 2-3 year warranty, nothing would stop the miners from buying the full 10-year variant. This mining craze is becoming a real pain to we PC enthusiasts.
  • 10tacle
    You are making everyone's head hurt. If you want to complain about Corsair, then do so on Corsair's customer support forums and social media. Also, just FYI, Tom's only reviews what is sent to them. They do not go "cherry pick" buy products and review them. For someone who is an alleged "original reader" of Tom's I'd have expected you to understand that.
  • jonnyguru
    jellwood... aka: Alex Jones.
  • jonnyguru
    1593398 said:
    Not another plug/connector change!. I, like many people on this site, build custom PC's, part of which includes sleeved cables. One bug bear is 2 wires into 1, which is a in in the arse. I personally like the HXi series of Corsair PSU's which only have one such connection. I also think the 24 pin ATX supply is outdated and needs revision. I can't see the point of supplying motherboards with 3.3 and 5v rails. If only 12v was supplied with any or all voltage reduction made on board life would be so much simpler and neater. By providing more noise reduction at source (the PSU) gives Motherboard manufacturers an open cart to reduce the quality of voltage regulation i.e capacitor quality, on the motherboard. Is there really a need for another PSU on the market?


    Bro.. You're all over the place. :D

    So only the 24-pin is pin incompatible with the Type 3 cables. And yes... it's because of the extra sense wires. If you're really going to get all wound up about having to do 2-to-1 wires when doing custom cables, you know what you should do? Don't do 2-to-1 wires. They're only sense wires. The lack of them doesn't prevent the PSU from working. It'll just make your voltage regulation "as bad" as any other PSU that doesn't have the sense wires.

    Yes. The ATX spec is out of date. But Intel wrote it and nobody is going ot implement a new standard without Intel's blessing. They even released a whole new ATX design guide last month that changes almost everything (T1 timing, T3 timing, standby efficiency..) but DID NOT TOUCH the pinout (they made -12V "optional", but that's hardly much of a change).
  • beatnutz
    Jellwood: I find it hard to believe that someone who does not know how to write a proper sentence is preparing any students for anything. Let alone the ACT.
  • beatnutz
    Jellwood: I find it hard to believe that someone who does not know how to write a proper sentence is preparing any students for anything. Let alone the ACT.
  • AgentLozen
    I kind of like reading his posts.

    Hey Jellwood! What else do you have to say?

    Edit:
    Oh yeah! I wanted to mention that I liked the review too.
    When you guys do power supply reviews, I have a hard time staying interested for the entire article. Components that effect performance are more relatable. Power supply benchmarks just don't do it for me.
    With that said, I read through the opening and the conclusion. It seems like a solid piece of gear. You guys need to produce a School House Rock video that gets me on board with power supply reviews.
  • MyDNA
    @GROZZIE you said "If only 12v was supplied with any or all voltage reduction made on board life would be so much simpler and neater" Voltage regulation from 12v to say 3.3v done on the motherboard would produce loads of heat, it's a complete waste of energy putting such a demanding circuitry on a motherboard. Even the most efficient voltage regulation circuitry using the most efficient electronic components by voltage reduction would not be feasible. Do you think that if it could be done that way it would not have been done by now?
  • beatnutz
    I had gadgets too in 1999, but I'm not sure how that or your students grades relate to this review at all. Why don't you just write a book and bury it somewhere?
  • jonnyguru
    I know I shouldn't feed the trolls, but....

    96606 said:
    wARNING!!!~~~Corsair has some QUALITY Problems with their PSUs! Big time! One AX1200i and TWO AX860i's this week! All Initial Out of the Box Failure!


    Yet the actual RMA rate at HQ is < 1%. I know typically "the customer is always right", but in this case....

    96606 said:
    ooks like the NEW OWNERS are Really Cutting Corners and the Rule NOW is to "SELL JUNK!"


    I'm guessing by "new owners" you're talking about EagleTree. For the record, EagleTree are investors, not owners, albeit with a majority stake. All current officers, management, etc. at Corsair has not changed.

    The transaction you refer to happened three weeks ago. It takes more time than that to procure the components required to build a PSU, actually build the PSU, and ship the PSU from China to distribution warehouses. This does not include actually shipping orders to retailers, getting them on the retailer's shelves and into the customers hands.

    Unless, in your mind, the transaction between Francisco Brothers and EagleTree went something like this (go back six months or so...).....

    EagleTree: "So you know that computer component company you guys invested in?"
    Francisco Bros: "You mean Corsair? Yeah."
    EagleTree: "Well... we want to take that off your hands. We'll make it worth your while.. but we ask you do one thing first."
    Francisco Bros: "Hmm... Depends. What are you thinking about?"
    EagleTree: "We want you to tell all of Corsair's suppliers... Flextronics, Asetek, HEC, Lite On.... Tell them all to start cutting corners on everything they make for Corsair. Once we see a measurable reduction in quality and an increase in failure rates, we'll buy your shares in the company."
    Francisco Bros: "DEAL!!!!!"
  • 10tacle
    Jellwood deleted his posts and cut and ran. That or he got FUD modded out. For the record I was not talking to myself previously.
  • beatnutz
    202972 said:
    Jellwood deleted his posts and cut and ran. That or he got FUD modded out. For the record I was not talking to myself previously.


    That was weird. Looking back at it in hindsight maybe we should have been more impressed with his students ACT scores? I hate to see people leave like that.