How can you know if a MoBo can deliver 45W, 95W or 125W to the CPU?

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  1. Posts : 2,508
    Win 11 Pro
       #11

    Don't go by Intel's published spec's for a chipset. Dell, on many systems, uses a custom implementation of the chipset, thus it may not support all the CPU models that Intel spec's for a chipset. I work the Dell forums and see this many times.

    An example was the Dimension E510 desktop model. I don't remember the chipset that was on that but Intel spec's showed it was capable of up to a D965 CPU, but Dell custom implementation only allowed up to a D945 CPU. Put in a D965 and it wouldn't POST.

    Dell can use different motherboards in a given model, depending on how it was ordered.
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  2. Posts : 8,694
    Mac OS Catalina
       #12

    Remember that the PSU only delivers what it is asked by the hardware. If you were to use a 1000 watt PSU and the total wattage asked by all components installed are only going to use 100 watts, the PSU is not going to deliver any more than what the hardware wants to use and will not exceed what is demanded from it.
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  3. Posts : 191
    Windows 10 Home
    Thread Starter
       #13

    bro67 said:
    Remember that the PSU only delivers what it is asked by the hardware. If you were to use a 1000 watt PSU and the total wattage asked by all components installed are only going to use 100 watts, the PSU is not going to deliver any more than what the hardware wants to use and will not exceed what is demanded from it.
    Yeah, I know that, I'm lost, what that has to do with anything here commented or asked?
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  4. Posts : 8,694
    Mac OS Catalina
       #14

    rambomhtri said:
    Yeah, I know that, I'm lost, what that has to do with anything here commented or asked?
    The fact that the Motherboard for what Dell spec’d out is not the concern. It is the other hardware items, especially a add-on GPU card that will require more from the PSU.
    Maybe this will help you out. Power Supply Calculator - PSU Calculator | OuterVision

    With just the Motherboard and no other hardware, you are going to need at least a 195 watt PSU. The wattage changes depending on how efficient the hardware is.
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  5. Posts : 191
    Windows 10 Home
    Thread Starter
       #15

    bro67 said:
    The fact that the Motherboard for what Dell spec’d out is not the concern. It is the other hardware items, especially a add-on GPU card that will require more from the PSU.
    Maybe this will help you out. Power Supply Calculator - PSU Calculator | OuterVision

    With just the Motherboard and no other hardware, you are going to need at least a 195 watt PSU. The wattage changes depending on how efficient the hardware is.
    No, what? I'm telling you guys that I've measured it with electrical equipment and I'm getting 170W peaks under full load with that MoBo + Q9550 + GT 730. Why do you say I need almost 200W for just the MoBo without anything else? That MoBo without a CPU and GPU must draw 50-70W maximum.

    Besides, this all is not the point neither this thread's debate. I'm trying to figure out if there are any limits set by the MoBo for the CPU. Say you buy a crappy Dell that came with a 45W CPU, and you swap it by a compatible 125W CPU. Is the MoBo going to be able to give those 125W to the CPU? Where can you find that stuff?

    Something like "maximum W supported by this MoBo is 65W for the processor. Any higher power CPU will not work properly".
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  6. Posts : 7,711
    3-Win-7Prox64 3-Win10Prox64 3-LinuxMint20.2
       #16

    Hi,
    Not sure if you have peanut butter in the ears or eyes in forum speak but it's been stated a few times you just don't understand or something I've lost interest.

    Refer to which ever mother board manufacture for the data for compatible cpu's if it's not there support by chat or email with them

    Then refer to the cpu manufacture for power draw if it's not there support by chat or email with them.
    Boom bye-bye
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  7. Posts : 8,694
    Mac OS Catalina
       #17

    rambomhtri said:
    No, what? I'm telling you guys that I've measured it with electrical equipment and I'm getting 170W peaks under full load with that MoBo + Q9550 + GT 730. Why do you say I need almost 200W for just the MoBo without anything else? That MoBo without a CPU and GPU must draw 50-70W maximum.

    Besides, this all is not the point neither this thread's debate. I'm trying to figure out if there are any limits set by the MoBo for the CPU. Say you buy a crappy Dell that came with a 45W CPU, and you swap it by a compatible 125W CPU. Is the MoBo going to be able to give those 125W to the CPU? Where can you find that stuff?

    Something like "maximum W supported by this MoBo is 65W for the processor. Any higher power CPU will not work properly".
    Standard CPUs use between 65 and 85 watts, while quad-core processors range from 95 to 140 watts

    Calculating Power Consumption Of The Entire System - How Much Power Does Your Graphics Card Need?
    Intel(R) Core™ Processors Technical Resources
    CompTIA A+ Cert Guide: Power Supplies and System Cooling | Foundation Topics | Pearson IT Certification
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  8. Posts : 191
    Windows 10 Home
    Thread Starter
       #18

    And I don't know if you can't read my messages or I can't explain myself correctly.


    I've said several times that I am NOT looking for a CPU compatible list, that is NOT what I'm asking for. I'm asking for the maximum power delivery any given MoBo can give to the CPU socket. Is that even in the specs sheet? Does that even exist?
    Notice that is NOT the same as a page with compatible CPU's, nor a power calculator of the whole system, neither the PSU required to power any given GPU. None of that is what I'm asking for.

    May be I should start with the basics... Is there such a thing in desktop MoBo's as CPU limited power?
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  9. Posts : 8,694
    Mac OS Catalina
       #19

    rambomhtri said:
    And I don't know if you can't read my messages or I can't explain myself correctly.


    I've said several times that I am NOT looking for a CPU compatible list, that is NOT what I'm asking for. I'm asking for the maximum power delivery any given MoBo can give to the CPU socket. Is that even in the specs sheet? Does that even exist?
    Notice that is NOT the same as a page with compatible CPU's, nor a power calculator of the whole system, neither the PSU required to power any given GPU. None of that is what I'm asking for.

    May be I should start with the basics... Is there such a thing in desktop MoBo's as CPU limited power?
    You have been given all of the tools. Use the Calculator link if you wish to do so. You are now on your own at this point, since even the CompTIA A+ info will never get read by you to understand how this works.
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  10. Posts : 191
    Windows 10 Home
    Thread Starter
       #20

    bro67 said:
    You have been given all of the tools. Use the Calculator link if you wish to do so. You are now on your own at this point, since even the CompTIA A+ info will never get read by you to understand how this works.
    Actually I was reading it until I saw 4GB of ram uses 60W, and 8GB 120W. What!?!? How can I take seriously a page that says that?
    You say many things that I already know but never answer what I'm asking for. I don't need to calculate the power of the system, not only I know how to do it theoretically but I also do it experimentally. This is not, for the fifth time, what I'm asking for. My answer requires a link to a data sheet that has WATTS units, not CPU, no calculators. May be it doesn't exist such spec, MOBO manufacturers don't give that info, but then I don't know how can you know how much power a MoBo can give to the cpu socket. You can't just plug a 400W CPU there (if it existed), there must be a limit.
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