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Idea for lowering cores usage.

post #1 of 17
Thread Starter 
Hey i have an idea which is... i dont know if possible. The idea is to have our quad cores running only 1 cores for most of the time and when desired cpu usage is reached, next core is starting to work.

Example:

We boot up our pc and defaulty we use all of our cores from start, with mine idea it would look like our cores are launching one after another if the cpu usage is met.


Boot
Cpu 0 starts

if cpu 0 usage hits 70% then Cpu 1 starts.
if cpu 0 and 1 hits 70% of usage then Cpu 2 starts.
if cpu 0,1 and 2 hits 70% of usage then Cpu 3 starts.


Why the idea? Simply to spare our cores when they are not needed, this way also we could lower power consumption over time and also keep our cpu lifespan longer. Such thing could be a nice way to see how much power we really need in our everyday tasks and gaming.

If there is software that can do it already, please tell me what is it called.
post #2 of 17
Thread Starter 
I think i found a programm for my needs after all.

http://bitsum.com/about_cpu_core_parking.php
post #3 of 17
Core parking only works for CPUs that have hyperthreading such as the i3 or the i7. And some i5 CPUs.

Its already enabled automatically for compatible CPUs.
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post #4 of 17
Windows already does things that you like with regards to your idea. Even without that parking thingy, whenever a CPU core does not do anything, Windows executes the "halt" command. The current CPUs are then pretty close to being asleep, use very little power.

The other thing Windows does is reduce clock speed when load is very low. If it's below 20% or something, your CPU's speed gets set to as little as 800MHz.

So if you put those two things together, the CPU first runs at only 800MHz most of the time when you are just browsing websites or watching videos or something, and additionally, something like 20% load means that the CPU cores are in that "halt" state 80% of the time.
post #5 of 17
Thread Starter 
yeah i know but what i wanted to achieve is complete turn off of unused cores.
post #6 of 17
I can't think of any other way other than to put in a dual core to save energy. When you want more cores, then use a quad core.
    
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post #7 of 17
Thread Starter 
Quote:
Originally Posted by intelfan View Post

I can't think of any other way other than to put in a dual core to save energy. When you want more cores, then use a quad core.
Not worth the hassle, why just wouldnt be it good to turn off 2 of cores when they arent needed?
post #8 of 17
Quote:
Originally Posted by Torvi View Post

Not worth the hassle, why just wouldnt be it good to turn off 2 of cores when they arent needed?

It is a good idea but I don't see a way where you can fully turn them off, only keep them in a low powered idle state.
    
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post #9 of 17
Quote:
Originally Posted by Torvi View Post

yeah i know but what i wanted to achieve is complete turn off of unused cores.

Check Vcore voltage in a program like HWINFO. You will see it's close to zero a lot on Haswell which is the CPU you have. It really is already working super great with this newest generation of CPUs, the cores are basically off even unparked.
post #10 of 17
If you enable the low powered C States in your bios, your CPU will automatically turn off your unused cores. This technology works great in the Haswell CPUs. There is no need to try and out think what an Intel CPU is already designed to do.

Run RealTemp T|I and click on the C States button to make sure your CPU is using this technology.
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