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Overclocking TDP calculator

Discussion in 'Overclocking & Cooling' started by buildzoid, Jan 3, 2014.

  1. buildzoid

    buildzoid

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    Literally what the title says you put in the stock TDP(for GPUs I recommend using W1zz's power draw numbers), stock voltage, OC voltage, stock frequency and OC frequency then you press calculate and you will get the parts total power draw and the current on the output side of the VRM(so you can check that you won't blow up the VRM). I checked the accuracy of the program using W1zz's gpu power draw and voltage tuning power draw figures and can say the program is not very accurate for GPUs because it under calculates GPU power draw figures because of VRM efficiency drops that GPUs suffer as they are over clocked(I plan to add a method for compensating). For CPUs however it is within a +/- 5% error margin.
    Here is the LINK.
    I would also appreciate if people tested the accuracy for me so I can tweak the algorithm. To test the accuracy take one of those outlet power draw meters and post the power at stock(use Cinebench for CPUs and Furmark for GPUs) and OCed power draw(use Cinebench for CPUs and Furmark for GPUs) here so I can compare if the differences line up if they don't I'll tweak the equation until it does. Also tell me your PSU efficiency as that has a small but significant effect.
    Last edited: Jan 3, 2014
    the54thvoid says thanks.
  2. the54thvoid

    the54thvoid

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    Sounds excellent! I have no power meter so can't oblige just now but I'll be very interested to see how the overclocking part develops (if possible). I run a heavily overclocked Titan and it would interested to see it's estimated power draw. Good work. :toast:
  3. buildzoid

    buildzoid

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    Yeah when you do that don't trust the numbers that much because Nvidia's boost screws with clockspeed and voltage too much for the algorithm to work properly and you'll end with a number quite a bit higher than what your TITAN is really pulling. It works really well on all AMD(I tested a Phenom IIs 8pin power draw and it was almost exactly 125W) CPUs, OK on Intel CPUs (The amperage doesn't work for Haswells and intels TDP is iffy), crap(I can fix this with more numbers) on AMD GPUs and pre-kepler Nvidia GPUs and I have no idea how accurate it is with post kepler GPUs until I get numbers that don't have the boost algorithm affecting them.
  4. the54thvoid

    the54thvoid

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    I use a non-boost custom BIOS. So very liberating!
  5. buildzoid

    buildzoid

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    It will still undershoot by up to 18% so if the calculator says that your Titan pulls 300W then it might be anything from 300W to 354W. I think I'm gonna add options for error estimation by device type. Also do you have any ideas for what I should add(excluding a CPU and GPU TDP database)?
  6. the54thvoid

    the54thvoid

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    I'm not a software person so my input is very limited. I believe temps also affect power draw so cooling method may skew figures too? The efficiency rating of the PSU is relevant as well? i.e. if you use a 90% efficient PSU, if your system will pull less power from the socket than an 80% efficient PSU (and that efficiency will vary with load).

    Hell... good luck - you've given yourself quite a task!!
  7. buildzoid

    buildzoid

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    You know what I'm gonna make this a full blown PSU calculator except it won't have a database backing it just some estimates and some common TDP figures. The next version will be up in a week or two. That is if I don't get sidetracked by my other projects.

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