difference i5-4570 and i5-4570s

hp32sII

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Dez. 2013
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I was wondering what is the technical difference between a standard cpu (like i5-4570) and the lower power s version (like the i5-4570s). Some people say you can make a i5-4570 behave exactly the same as a i5-4570s with the bios (but how do you do that ?) but then I don't understand why Intel is selling a i5-4570s. I know the tdp is different, but does that mean that a i5-4570s with a good cooler will perform (almost) like a i5-4570 with a standard cooler ? When I compare performance (based on cpubenchmark.net), then I see that a i5-4440s performs 6% less than a i5-4440, but a i5-4570s only 3% less then a i5-4570 : why is the performance difference not the same ? When I looked into these s versions, I was surprised that a 20% lower tdp only results in about 5% performance loss. Who knows more about these s versions ?
 
http://ark.intel.com/compare/75043,75044

Because of the lower TDP the i5 4570s can't use its Boost for long (even if it stays cool, Power consumption ist still high). So they may be equal for a short time, but if the application runs more than a few minutes, the i5 4570s starts to slow down, while the i5 4570 still holds its turbo speed.
 
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