CPU max TDP

[JaZoN_XD]

For an Intel CPU, for example, is the maximum TDP including running the cpu AND the integrated graphics or is it just running the cpu? For example, my i5 has a max tdp of 84w but i havent seen it go over 73w under load from intel burn test and i use a discreet gpu so the graphics portion of the cpu uses no power.

[Godlygamer23]

TDP and power consumption aren't really the same thing. TDP refers to the amount of heat produced by the CPU. I believe the TDP is with both the iGPU and CPU running.

[Aniallation]

TDP counts both iGPU and CPU. However TDP is not the same as power consumption. They are often close in numbers, but not the same thing.

[brokencross]

84W or 88W TDP are just rounded numbers Intel decides to announce on a given architecture. Doesn't necessarily mean the CPU will indeed produce 84W of heat.

[Glenwing]

The power consumption and heat generation are the same. However, TDP doesn't tell you either of those exactly. TDP is really a sort of estimated number, it's the maximum amount of heat per second that anyone designing a cooler should expect to be dealing with under a sustained maximum load. It's nowhere near the "theoretical maximum heat" or power draw a processor is capable of. Heat is generated whenever a transistor fires, and in a realistic scenario only a tiny fraction of the CPU's transistors are firing during any given cycle, even under maximum load. Of course you can write a virus that will just fire every transistor and spike power and heat way up, but realistically the TDP is about the max you should expect under a normal scenario. Depending on the actual tasks your CPU is doing, it'll usually be drawing less power than that, but again depending on the task it may go slightly above the TDP at times. And yes, TDP does include integrated graphics, as the specification is really intended to be useful for people designing cooling units, so integrated graphics must be taken into account.

[JaZoN_XD]

TDP and power consumption aren't really the same thing. TDP refers to the amount of heat produced by the CPU. I believe the TDP is with both the iGPU and CPU running.

 

 

TDP counts both iGPU and CPU. However TDP is not the same as power consumption. They are often close in numbers, but not the same thing.

 

 

84W or 88W TDP are just rounded numbers Intel decides to announce on a given architecture. Doesn't necessarily mean the CPU will indeed produce 84W of heat.

Oh. Didn't know that. So is there a way we can compare the "CPU Power" to the stated/specified TDP? Since TDP is apparently a unit of heat output, is there a way we can compare it with the information sensors give us?

[Glenwing]

Oh. Didn't know that. So is there a way we can compare the "CPU Power" to the stated/specified TDP? Since TDP is apparently a unit of heat output, is there a way we can compare it with the information sensors give us?

 

Whatever sensors report to you is the current power draw is the current power draw, and is also the current heat output.

[Godlygamer23]

Whatever sensors report to you is the current power draw is the current power draw, and is also the current heat output.

Presuming the software and sensors are interpreting the values properly.

[JaZoN_XD]

Presuming the software and sensors are interpreting the values properly.

 

Whatever sensors report to you is the current power draw is the current power draw, and is also the current heat output.

Alright, I see, thanks!

[brokencross]

Oh. Didn't know that. So is there a way we can compare the "CPU Power" to the stated/specified TDP? Since TDP is apparently a unit of heat output, is there a way we can compare it with the information sensors give us?

The only way to determine the real heat output is to probe the cpu. There are no sensors built-in to determine that. The sensors can only read whatever temp the cores and the package report.