Downclocking, please explain?

In another thread someone mentioned to me that CPU and GPU can downclock if over heating to prevent damage.

Is this a standard thing these days or is it only some models?

Or do i have his all wrong?

I've been out of the loop for quite a few years now and this was just something i hadn't heard anywhere else, can anyone explane this further for me please?
10 answers Last reply Best Answer
More about downclocking explain
  1. There are two times this can happen. First, they can downclock due to heat. Pretty sure this is all models though I'm not sure GPUs do this. Second, they can downclock while idling so they don't cost you as much money or get as hot. All CPU and GPUs do this, its nothing to worry about. You do need to worry about the first case as it can damage your CPU. The second case is nothing to worry about as it will go back to the correct clocks once you place a load on your GPU.
  2. cool thanks for that
  3. They downclock when they are idle.

    So right now while your typing on your computer, your cpu is running slower than it's rated speed, as is your graphics card. When you do something cpu/gpu intensive, they speed up to their rated speed.

    It's for power saving purposes.
  4. so what about the downclocking when overheating?
    how effective is this in protecting hardware?
    is there standard thresholds they work too?
    is it something that is turned off when overclocking?

    question questions questions
  5. In cases like multimedia computers that the processor is really more than
    is needed for the multimedia work (streaming video,music etc)
    users will downclock the CPU to conserve electricity and reduce heat
    Since modern CPUs are more than powerful enough for multimedia
    use they can have some performance reduced
    Primarily reducing heat in a multimedia setup is done since the least
    amount of fans in case causing noise is desired

    Also to get an accurate idle temp
    Users will turn every fan up and open the case
    then they will downclock and lower voltage to
    get the lowest idle temp possible to calibrate
    their temperature monitoring programs
    If the idle temp with air cooling is below
    ambient room temp then you know
    that the monitoring program is inaccurate
  6. I'm more curios to know about auto downclocking.
    I'm soon to build a new Sandy Bridge based PC as a Gaming and media center, running on a 42' LCD TV and home theatre amp. Hot climate, room with no air con and someone mentioned to me in another thread about the cpu and gup downclocling themselves if they over heat.
    Hence my above questions about thresholds and the like?
  7. Best answer
    when a processor either in your CPU or your video card
    gets about 20c over TJMax then it will shutdown (approx 125c for cpus and 150c for GPU)

    at 5c above TJMax (@100-105 generally) thermal throttling
    occurs where the clock and voltage is dropped down to lower

    download CoreTemp (free and safe)
    in advanced options check off "show distance to TJMax"
    this will take a direct reading of TJMax (max operating temp)
    off of the Digital Thermal Sensor (DTS)

    Intel doesnt usally publish TJmax numbers
    they use Tcase in spec sheets
    Tcase is max safe load temp where it can run all
    day and be ok
    Tjmax is max temp where it starts to get dangerous

    Using Coretemp and looking at your distance to TJmax
    which is a number that gets lower as your temp gets
    if it nevers go lower than 15c to Tjmax then
    you do not have to worry about your temps

    Realize that about 125c is where the CPU can "melt"
    your cpu at about 100-105 will throttle itself
  8. I love your venom pic.
  9. awesome ...thanks, thats what i wanted to know.

    It's not Venom, not that he's not cool and all, it's to logo for the band Mushroomhead.
  10. Best answer selected by ddemon.
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