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TheKanter's profile
David Kanter
David Kanter
David Kanter
@TheKanter

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David Kanter

@TheKanter

San Francisco
realworldtech.com
Joined November 2009

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    1. Charlie (TDP)‏ @ghost_motley Sep 18
      Replying to @ghost_motley @dylan522p and

      In short...pic.twitter.com/KPLuYBr1cz

      1 reply 0 retweets 2 likes
    2. juanrga‏ @juanrga Sep 18
      Replying to @ghost_motley @dylan522p and

      I enjoy how he talks about thermal watts and electrical watts. There is no such thing, only watts.

      2 replies 0 retweets 0 likes
    3. Charlie (TDP)‏ @ghost_motley Sep 18
      Replying to @juanrga @dylan522p and

      You are incorrect, read the full statement @Thracks makes. The official Intel documentation details TDP as... Again, no relation to power consumption. Here is AMD's as well.pic.twitter.com/3RN7seEU0C

      2 replies 0 retweets 1 like
    4. Charlie (TDP)‏ @ghost_motley Sep 18
      Replying to @ghost_motley @juanrga and

      You are also free to read the Wikipedia page; https://en.wikipedia.org/wiki/Thermal_design_power … TDP isn't Power Consumption, and the definition varies slightly from OEM to OEM. You literally have official Intel, AMD, Wikipedia and an AMD employee who disputes what you've said, as well as others...

      3 replies 0 retweets 2 likes
    5. juanrga‏ @juanrga Sep 18
      Replying to @ghost_motley @dylan522p and

      Wikipedia isn't a valid academic reference. Intel doesn't disagree with me and the AMD marketing guy is only posting marketing stuff on a AMD subreddit. The definition I use is standard: TDP = sustained power consumptionhttps://books.google.es/books?id=cM8mDwAAQBAJ&pg=PA24&lpg=PA24&dq=tdp+%22sustained+power+consumption%22&source=bl&ots=SHYbEe_Xzj&sig=8XVCW5vXoQqXHJTryISiW7PnQTw&hl=en&sa=X&ved=2ahUKEwiet_jTrsXdAhUCuRoKHYBuCsgQ6AEwA3oECAkQAQ#v=onepage&q=tdp%20%22sustained%20power%20consumption%22&f=false …

      3 replies 0 retweets 0 likes
    6. Robert Hallock 🌹‏Verified account @Thracks Sep 18
      Replying to @juanrga @ghost_motley and

      I am that "AMD marketing guy." My post spells out precisely how we define and calculate the TDP for "Zen" products. You may take or leave a first-party source at your discretion.

      2 replies 2 retweets 7 likes
    7. witeken‏ @witeken Sep 19
      Replying to @Thracks @dcominottim and

      I think you are reversing how the actual engineering is done. For instance, have you noticed how laptop chips are always "magically" 15W? That's because the SKUs were _defined_ so they fit the 15W power consumption target of laptops, not the other way around. cc @IanCutress

      2 replies 0 retweets 0 likes
    8. Ian Cutress‏Verified account @IanCutress Sep 19
      Replying to @witeken @Thracks and

      AMD actually uses a calculation for TDP based on thermal capacity of the cooler, temp, and workload. If you define the cooler at a higher thermal capacity, the TDP is lower. I've said this on multiple articles. https://www.anandtech.com/show/12625/amd-second-generation-ryzen-7-2700x-2700-ryzen-5-2600x-2600/8 …pic.twitter.com/Wb1c8qatIB

      5 replies 3 retweets 11 likes
    9. witeken‏ @witeken Sep 19
      Replying to @IanCutress @Thracks and

      cc @FPiednoel any comment?

      1 reply 0 retweets 1 like
    10. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
      Replying to @witeken @IanCutress and

      I think that they are so many speculations, and TDP from $INTC are 🍎 and TDP from $AMD are 🍌, and they can’t be compared. The only thing I’ll say ... let’s get to October, when INTC usually does it’s Christmas 🎄 shinny products update for Xmas ... I know some will eat hats 🤪

      1 reply 0 retweets 3 likes
      David Kanter‏ @TheKanter Sep 19
      Replying to @FPiednoel @witeken and

      This is really simple. Read the definitions, word for word. Remember that power delivery and thermal dissipation have wildly different time scales. They are related, but indirectly.

      10:48 AM - 19 Sep 2018
      • 1 Retweet
      • 5 Likes
      • K.H. Chia MSA Matthias;Waldhauer Charlie (TDP) Danilo Cominotti (APU)
      1 reply 1 retweet 5 likes
        1. New conversation
        2. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @TheKanter @witeken and

          If It was that simple, $AMD would not have spent so much marketing dollars to put their own definition of TDP ... It is extremely confusing to consumers.

          1 reply 0 retweets 1 like
        3. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          If you want to understand why TDP is not the right matrix, here it is … I was one of those giving this lecture for 1 year, so, here it is again (I posted it 2 days ago already) https://www.intel.com/content/dam/doc/white-paper/resources-xeon-measuring-processor-power-paper.pdf … It is a lot more complicated than it looks.

          1 reply 0 retweets 2 likes
        4. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          If you are interested on the modern way to figure out your power models, there was SDP too, it got kind of erased from http://intel.com , TDP and ADP, SDP can all be manipulated, based on the scenario you want to benchmark https://www.intel.com/content/dam/www/public/us/en/documents/design-guides/atom-e3800-m-d-i-soc-thermal-design-guide.pdf …

          1 reply 0 retweets 2 likes
        5. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          For chip designers, TDP is just a average number, you can actually use a lot more than the TDP, most laptop CPU do that, and Servers chips do too, most people benchmarking servers don't really test those either, as they trend to "average their results to express opinions"

          1 reply 0 retweets 2 likes
        6. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          But for a matter of fact, a processor like the Xeon Gold, equipped with Hardware P state (Speedshift) will answer a database request a lot faster than a CPU without it, while using more power than the TDP for few milliseconds … You see … it is not only about reading only ...

          1 reply 0 retweets 3 likes
        7. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          The Devil is in the details, with hardware P-state, the speed for database request is a lot better, most #responsible system designer will not run its CPU at 100% load, they run them at 70% … giving room for #speedshift to do its work, because nobody design systems to max out

          1 reply 0 retweets 1 like
        8. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          But the press keep testing their system at 100% load, neglecting the entire spectrum of usage models that are the majority of system out there. Very few people design their server farms to have a node max out at day one. (if you do, you are not too smart)

          1 reply 0 retweets 2 likes
        9. François Piednoël 🇺🇸 🇫🇷‏ @FPiednoel Sep 19
          Replying to @FPiednoel @TheKanter and

          Bottom line, The scenario for your new server system does include leaving room for expension of your compute capability, then, SDP is definitively more important than TDP, and performance tricks like Hardware P State are the real boosters of your user experience latency.

          0 replies 0 retweets 2 likes
        10. End of conversation

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