Actual power consumption of a processor

[cobito]

Hello. I was looking for updated information on the power consumption of processors at 100% usage. The only thing I find is the misleading TDP that tells me absolutely nothing about consumption with continuous 100% usage.

I am not very clear if, for example, the performance-to-power ratio of an Atom based on Haswell is better, worse, or the same as an i7 4770K when both are at 100% for 24 hours.

Thank you.

[whoololon]

Indeed, there is no way (that I know of) to measure the specific consumption of the processor.
Obviously you can compare the overall consumption of a computer with another identical one with a different processor (and perhaps motherboard), with the same software environment while executing the same task.

[krampak]

I think that looking at the global consumption at rest and at full load (with an application that makes exclusive use of the CPU) should be close enough to draw a conclusion. Doesn't the "power" shown by the core temp come close to it?
And if you don't have a "wattimetro" you can look at the amperage on the 4/8 pin cable of the motherboard which is where the CPU is powered from.

[cobito]

@krampak:

I think that looking at the global consumption at rest and at full load (with an application that makes exclusive use of the CPU) should be close enough to draw a conclusion. Doesn't the "power" shown by the core temp come close to it?
And if you don't have a "wattimetro" you can look at the amperage on the 4/8 pin cable of the motherboard which is where the CPU is powered from.

The problem is that I want to know before I buy :ugly:

Tomshardware has a comparison with the top micros, but it's from 2012.

[Sylver]

@cobito:

The problem is that I want to know before I buy :ugly:

Tomshardware has a comparison with the top micros, but it's from 2012.

Guide yourself more or less by the opinion of the users on the net and don't get too worked up. You always have between 7 and 15 days to return the product if you don't like it, right? :ugly:

Greetings!