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  1. #1
    ROG Member Array isaacc PC Specs
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    SupremeFX CODECs S1220 and S1220A; what's the difference

    Of the Z270 mobo that have SupremeFX, some are specified as using the S1220A CODEC and others the S1220. What's the difference between the two in terms of features? I've been all over the Internet and can't find any information about it. I wish ASUS had a dedicated SupremeFX page that lays out all the features and specifications of the various SupremeFX packages and CODECs. Thanks.

  2. #2
    Tech Marketing Manager HQ Array Raja@ASUS's Avatar
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    The 1220A lacks i2S output. The S1220 has i2S, and the ROG boards that feature this use the ESS Sabre DAC and headphone buffer to drive front panel audio output.

  3. #3
    ROG Member Array isaacc PC Specs
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    Could that be a typo for the ROG Maximus IX Apex. It is described as both using the S1220A codec as well as having the Sabre DAC (ES9023P). Should it state S1220 codec instead? Otherwise, I'm confused. Thanks.

  4. #4
    Tech Marketing Manager HQ Array Raja@ASUS's Avatar
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    That's a mistake on the page that will be corrected. It doesn't have the ESS DAC. It uses the S1220A, not the S1220.

  5. #5
    ROG Member Array MeTaL_SnAkE PC Specs
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    Quote Originally Posted by Raja@ASUS View Post
    The 1220A lacks i2S output. The S1220 has i2S, and the ROG boards that feature this use the ESS Sabre DAC and headphone buffer to drive front panel audio output.
    My english is a little bad sometimes so i'm not sure if I understand correctly.. That means that the front audio panel won't use some of the benefits like the 'headphone buffer' in the front panel for the Apex?

  6. #6
    ROG Enthusiast Array ikrananka PC Specs
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    Quote Originally Posted by Raja@ASUS View Post
    The 1220A lacks i2S output. The S1220 has i2S, and the ROG boards that feature this use the ESS Sabre DAC and headphone buffer to drive front panel audio output.
    I had exactly the same question, and also agree with the OP that Asus really need a webpage that provides far more details of the various flavours of SupremeFX to help buyers in their decision making process.

    Now, you state that the S1220 has i2S - does this improve the audio quality through speakers connected to the back panel connnectors?

    Does the ESS Sabre DAC and the headphone buffer ONLY benefit the front panel connectors?

  7. #7
    Tech Marketing Manager HQ Array Raja@ASUS's Avatar
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    Quote Originally Posted by ikrananka View Post
    I had exactly the same question, and also agree with the OP that Asus really need a webpage that provides far more details of the various flavours of SupremeFX to help buyers in their decision making process.

    Now, you state that the S1220 has i2S - does this improve the audio quality through speakers connected to the back panel connnectors?
    i2S is a method of transferring digital data to a DAC. It has nothing to do with the analog domain as your post implies. To be more accurate, the ESS DAC is not connected to the rear panel outputs, so it does not supply the rear analog outputs.

    Quote Originally Posted by ikrananka View Post
    Does the ESS Sabre DAC and the headphone buffer ONLY benefit the front panel connectors?
    Yes.

  8. #8
    ROG Enthusiast Array ikrananka PC Specs
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    Quote Originally Posted by Raja@ASUS View Post
    i2S is a method of transferring digital data to a DAC. It has nothing to do with the analog domain as your post implies. To be more accurate, the ESS DAC is not connected to the rear panel outputs, so it does not supply the rear analog outputs.



    Yes.
    Thanks for the clarification. So, does that mean there is no difference in analog audio quality output to speakers (rear panel) between the S1220A and S1220?

  9. #9
    Tech Marketing Manager HQ Array Raja@ASUS's Avatar
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    From a codec perspective, it depends what type of output stage is utilized internally (and how much difference that may make). If there are any differences in the amount of decoupling used on some boards, component layout, trace routing, or the PCB layer count, then that can make a minor difference in some situations (but we're getting into audiophile territory).

  10. #10
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    Quote Originally Posted by Raja@ASUS View Post
    the ESS DAC is not connected to the rear panel outputs, so it does not supply the rear analog outputs.
    I found contradicting information @ https://unlocked.newegg.com/article/...0-motherboards

    "A new change for ASUS is the inclusion of the DAC and amp on the back of the motherboard. Previously, the fancy audio equipment only worked on the front audio header. So if you plugged your high ohm audiophile headphones into the back, you’d have a bad time.Now, the killer ESS Sabre DAC (and amp) powers both the front and back jacks."

    So is the news article correct?

    Also, the Strix Z270 series have dual op-amps for headphones, but the more premium ROG Maximus IX series lack this.
    Is this because only ROG has the switching mosfets and therefore can use the same op-amp for both rear & front outputs while Strix needs a dedicated op-amp for both front & rear? Otherwise it would seem the Strix series has more powerful headphone output than ROG.

    Thank you.

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