cpu efficiency

[rickadada]

if two cpu i7 8700 and i7 8700k are under same frequency which one will be more efficient? i.e. consume less power for maintaining same frequency.

 

[Crunchy Dragon]

The 8700 and 8700K are practically the same CPU at stock speeds. The only real difference is that one is unlocked.

 

EDIT: What I'm essentially saying is that they will both be equally efficient. The 8700K really only pulls ahead of the 8700 in performance when overclocked.

 

-Moved to CPUs, Motherboards, and Memory-

[Princess Luna]

i7 8700 and the i7 8700K are identical at stock settings, both share the same turbo boost frequencies doing 4.3ghz all core boost.

 

Being the same processor in every way, cache, architecture, cores, hyper-threading.

 

The i7 8700 benefit is the lower TDP of 65W that makes it more efficient while also runs cooler, the i7 8700K will consume more power and heat more but has the unlocked aspect.

 

But truth be told at least right now there isn't a huge difference between a locked 4.4ghz i7 8700 with limit target on max vs a 5ghz i7 8700K both will fully utilize a 1080 Ti to the same amount and in productivity even software that focus on single thread performance will show pretty small gains.

 

Over all you don't need to overclock the i7 8700K and the locked 8700 works perfectly fine for every one, the whole overclocking is more of a fun thing nowadays, a hobby with its costs if you will... nothing wrong with doing it and I think any one into it totally should do it, it's just that it isn't the "free performance" "needed step to extract the most out of chip" kind of thing it was back on the i5 2500k days.

[Jurrunio]

Efficiency? These high clocked CPUs are inherently less efficient than low frequency ones with a ton of cores. You shouldnt be looking at these two if efficiency is that important.

[Enderman]

It will be identical.

[rickadada]

4 minutes ago, Princess Cadence said:

i7 8700 and the i7 8700K are identical at stock settings, both share the same turbo boost frequencies doing 4.3ghz all core boost.

 

Being the same processor in every way, cache, architecture, cores, hyper-threading.

 

The i7 8700 benefit is the lower TDP of 65W that makes it more efficient while also runs cooler, the i7 8700K will consume more power and heat more but has the unlocked aspect.

 

But truth be told at least right now there isn't a huge difference between a locked 4.4ghz i7 8700 with limit target on max vs a 5ghz i7 8700K both will fully utilize a 1080 Ti to the same amount and in productivity even software that focus on single thread performance will show pretty small gains.

 

Over all you don't need to overclock the i7 8700K and the locked 8700 works perfectly fine for every one, the whole overclocking is more of a fun thing nowadays, a hobby with its costs if you will... nothing wrong with doing it and I think any one into it totally should do it, it's just that it isn't the "free performance" "needed step to extract the most out of chip" kind of thing it was back on the i5 2500k days.

just tell me that an 8700 at 4.6 ghz will consume more power or an 8700k at 4.6ghz?

 

Spoiler

 

 

17 minutes ago, Crunchy Dragon said:

The 8700 and 8700K are practically the same CPU at stock speeds. The only real difference is that one is unlocked.

 

-Moved to CPUs, Motherboards, and Memory-but 

[Crunchy Dragon]

2 minutes ago, rickadada said:

just tell me that an 8700 at 4.6 ghz will consume more power or an 8700k at 4.6ghz

They should both consume the same power.

[Princess Luna]

2 minutes ago, rickadada said:

just tell me that an 8700 at 4.6 ghz will consume more power or an 8700k at 4.6ghz?

You can't lock all 6 cores of the 8700 on 4.6ghz, regardless whenever you stop using stock settings on the i7 8700k that one will consume more power, while they are stock they consume the same amount, that's it.

[Godlygamer23]

Just now, Crunchy Dragon said:

They should both consume the same power.

Depends on the voltage required per CPU, though I don't know how relevant that is with the 8700. 

[rickadada]

1 minute ago, Princess Cadence said:

You can't lock all 6 cores of the 8700 on 4.6ghz, regardless whenever you stop using stock settings on the i7 8700k that one will consume more power, while they are stock they consume the same amount, that's it.

i am not locking the cpus , suppose i am under a workload that require 4.6 ghz load to run then which one will consume less power and generate less heat

[Godlygamer23]

4 minutes ago, rickadada said:

i am not locking the cpus , suppose i am under a workload that require 4.6 ghz load to run then which one will consume less power and generate less heat

See my post in response to Crunch.

[meenmeen1103]

12 minutes ago, rickadada said:

i am not locking the cpus , suppose i am under a workload that require 4.6 ghz load to run then which one will consume less power and generate less heat

The difference will be incalculable, as even two identical CPU's of same model number can have varying miniscule voltage requirements for a target frequency. There's no scenario I can think of where this difference will matter, and if there was, the silicon difference itself can be a bigger variable than the model.