CPU Power Consumption

[pavichokche]

So I'm a fan of using less electricity and have been contemplating my next CPU choice. To keep things simple (and/or ignorant) I'm only considering Intel CPUs. I'm aware that the power numbers I'm listing are TDP values and not actual electrical power, but to my understanding they are representative and probably proportional to the actual power use. With that in mind, here are my questions regarding a few comparisons.

 

1. I7 7700 (65W) vs i7 7700k (95W) - will the 7700k generally be using more power under the same processing load? Or will it only begin to use more power than the 7700 once it begins to do more work than it?

2. i5 7600k (91W) vs i7 6700 (65W) - will the i5 be using more power under maximum load than the i7, even though it will probably be doing a bit less work?

3. i5 7600 (65W) vs i7 7700 (65W) - will they be using the same amount of power under maximum load, even though the i7 will be easily outperforming the i5?

 

Cheers

[themctipers]

more cores/threads = more usage

if its the same generation of cpu, the one with a lower clockspeed/cores/threads will use less power

k skus have a higher TDP because they're able to be overclocked to higher frequencies, keyword being able

[pavichokche]

20 minutes ago, themctipers said:

more cores/threads = more usage

if its the same generation of cpu, the one with a lower clockspeed/cores/threads will use less power

k skus have a higher TDP because they're able to be overclocked to higher frequencies, keyword being able

So then your answers would be:
1. Same (approximately)

2. No, i7 would be more

3. No, i7 would be more

?

[themctipers]

Just now, Top Cat said:

So then your answers would be:
1. Same (approximately)

2. No, i7 would be more

3. No, i7 would be more

?

yes

[themctipers]

5 minutes ago, Top Cat said:

So then your answers would be:
1. Same (approximately)

2. No, i7 would be more

3. No, i7 would be more

?

thing is, it'll use a tiny tiny bit more power (like 0.5w for extra threads) and 1-2w for that generational difference

the power sap comes from the ghz its running at, which you can change in the bios

[pavichokche]

11 minutes ago, themctipers said:

thing is, it'll use a tiny tiny bit more power (like 0.5w for extra threads) and 1-2w for that generational difference

the power sap comes from the ghz its running at, which you can change in the bios

That's interesting. On my computer right now, if I allow the CPU to lower its clock speed using the 'Energy Saving' mode in EasyTune, my PC's power use drops by MAYBE 1.5W after the CPU goes from 3.2GHz to about 800MHz (i5 4430).

[themctipers]

Just now, Top Cat said:

That's interesting. On my computer right now, if I allow the CPU to lower its clock speed using the 'Energy Saving' mode in EasyTune, my PC's power use drops by MAYBE 1.5W after the CPU goes from 3.2GHz to about 800MHz (i5 4430).

i assumed it would've dropped maybe 5w? ¯\_(ツ)_/¯

its just a tiny difference for huge performance i guess, i dont get why you're worried for power consumption for your cpu but whatever floats your boat

[pavichokche]

2 minutes ago, themctipers said:

i assumed it would've dropped maybe 5w? ¯\_(ツ)_/¯

its just a tiny difference for huge performance i guess, i dont get why you're worried for power consumption for your cpu but whatever floats your boat

 

Anyway thanks for sticking around, have a nice Saturday