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 Post subject: Why Intel Processors Draw More Power Than Expected
PostPosted: Fri Nov 09, 2018 8:13 pm 
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Joined: Tue Jul 22, 2008 6:05 pm
Posts: 328
Location: Calgary, AB, Canada
Interesting article on Anandtech:

Quote:
Why Intel Processors Draw More Power Than Expected: TDP and Turbo Explained

One of the recent topics permeating through the custom PC space recently has been about power draw. Intel’s latest eight-core processors are still rated at a TDP of 95W, and yet users are seeing power consumption north of 150-180W, which doesn’t make much sense. In this guide, we want to give you a proper understanding why this is the case, and why it gives us reviewers such a headache.
What is TDP (Thermal Design Power)?

With every processor, Intel guarantees a specific frequency at a specific power, often with a particular grade of cooler in mind. Most people equate a chip's TDP rating directly to its maximum power draw, given that the heat energy that needs to be dissipated from the processor is equal to the power consumed in doing calculations. Normally, the TDP rating is that specific power.

But TDP, in its strictest sense, relates to the ability of the cooler to dissipate heat. TDP is the minimum capacity of the CPU cooler required to get that guaranteed level of performance. Some energy dissipation also occurs through the socket and motherboard, which means that technically the cooler rating can be lower than the TDP, but in most circles TDP and power consumption are used to mean the same thing: how much power a CPU draws under load.


More:
https://www.anandtech.com/show/13544/wh ... -tdp-turbo


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 Post subject: Re: Why Intel Processors Draw More Power Than Expected
PostPosted: Sat Nov 10, 2018 11:36 am 
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Edited to add quote punctuation.

Yeah, a bunch of sites have chimed in on this.

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 Post subject: Re: Why Intel Processors Draw More Power Than Expected
PostPosted: Mon Nov 12, 2018 12:00 am 
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Joined: Tue Nov 04, 2008 6:03 am
Posts: 611
Location: Sweden
Yes, it's an interesting topic.
Quote:
... in most circles TDP and power consumption are used to mean the same thing: how much power a CPU draws under load.
Just to be clear, it should read:
"... how much power a CPU draws in average, over a time span, while under a typical load."
It's never been the peak power draw at some torture test.

Anyway, AMD's Wraith Spire cooler is rated for 95W and known to allow some overclocking with AMD's "95W" Ryzen CPUs.
I wonder how much you can overclock a Core i9-9900K using that cooler?


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