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Cpu TDP The Truth

Discussion in 'CPUs' started by mickyflinn, 21 Sep 2020.

  1. mickyflinn

    Capodecina

    Joined: 23 Mar 2011

    Posts: 10,736

    Location: West Side

    Why is it that the true tdp is not stated on Cpu's ?

    How come they havnt been taken to account for not staitng the max boost tdp.

    Surely it's misleading.
     
  2. no idea what

    Capodecina

    Joined: 5 Oct 2009

    Posts: 10,775

    Location: Lincolnshire

    It should be known that TDP != Power Draw.

     
  3. pc-guy

    Mobster

    Joined: 29 May 2005

    Posts: 3,706

    Over clock TDP is notoriously difficult as each chip has different potential for overclock. Some needing more bolts than others. Lastly each person can decide how they overclock their CPU. Some do mild others use LiN2 so crank massive volts and current through. so AMD & intel can never put that OC TDP on the package.

    I think AMD’s TDP is their design limit for stock settings including PBO. Where intel TDP is their nominal (non boost) output so when the CPU boosts it can draw a lot more than what's on intel's packaging So in all sense AMD is accurate given you don’t operate outside the stock settings. TDP is also an estimate due to chip to chip variation.

    Someone else probably can explain the crux of it a bit better as well.
     
    Last edited: 21 Sep 2020
  4. mickyflinn

    Capodecina

    Joined: 23 Mar 2011

    Posts: 10,736

    Location: West Side

    Very intresting video thanks.
     
  5. smilingcrow

    Hitman

    Joined: 27 Apr 2007

    Posts: 919

    Because the majority of people that care already know how the TDP game works.
    There are so many different boost levels depending on the number of cores loaded, temps, wattages, time spans, instruction type (AVX etc) etc that having one max TDP that covers all those bases is not ideal.
    For Intel it would be so embarrassingly high which is why they rate at the base clock for all cores.
     
  6. Justintime

    Sgarrista

    Joined: 24 Jul 2006

    Posts: 8,869

    Location: Edmonton, London, UK

    Yea my 9900K is '95W' lolololol
     
  7. breadturbo

    Mobster

    Joined: 27 Oct 2005

    Posts: 2,540

    The best one I saw for this was the old 3930k tdp of 130w, when overclocked I saw almost 500w on that when at 100%
     
  8. smilingcrow

    Hitman

    Joined: 27 Apr 2007

    Posts: 919

    That's got nothing to do with the official TDP though.
    You can add a silly voltage to many CPUs and take them to silly wattage figures.