i5 8600K CPU

spolle123

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Oct 15, 2017
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I have a friend that says that the i5 8600K is very bad for gaming because it has 6 cores but i think he is just an idiot or does he have a point?

Ok i should be more specific, he says if theres 2 identical CPUs but one of them got 4 cores 4 threads and the second got 6 cores 6 threads the 6 core CPU loses. But i myself thinks that makes no sense at all.

Also he says games cant utilise the 6 cores.
 
Solution
8700k > 8600k > 7700k is the basic pecking order, but only on the high end. Since you need a cooler and Z class board to use them at all, on top of the overclocking.

Value for money might be the R5-1600 and cheaper B350 motherboard. That gets you the same 6 cores 12 threads as the 8700k, but at something like 3.8 - 3.9Ghz instead of nearly 5Ghz, but for much less money. Or the locked i5-8400, but since the only available boards are the Z370, that makes it slightly more expensive then it needs to be.

And for a workstation/gaming build it is hard to ignore the R7-1700 with its 8 cores and 16 threads.

If you are somewhat pleased with your current build, I say hold off for Intel or AMD's next process shrink. They are talking Z390 and 8...

Eximo

Titan
Ambassador
8700k > 8600k > 7700k is the basic pecking order, but only on the high end. Since you need a cooler and Z class board to use them at all, on top of the overclocking.

Value for money might be the R5-1600 and cheaper B350 motherboard. That gets you the same 6 cores 12 threads as the 8700k, but at something like 3.8 - 3.9Ghz instead of nearly 5Ghz, but for much less money. Or the locked i5-8400, but since the only available boards are the Z370, that makes it slightly more expensive then it needs to be.

And for a workstation/gaming build it is hard to ignore the R7-1700 with its 8 cores and 16 threads.

If you are somewhat pleased with your current build, I say hold off for Intel or AMD's next process shrink. They are talking Z390 and 8 core processors on the Intel side, and hopefully competitive clock speeds from the AMD Ryzen chips. (They get those things to 4.5Ghz or so and they will be doing quite well, they are already good enough)

 
Solution
What your friend says used to make sense.

Many years ago intel's processor could not run each thread at a different frequency/speed.

For instance, my Core2Quad q6600 can run all its cores at 2.4 gigahertz or I could overclock and run all cores at 3.0 gigahertz.

This was an ok implementation, but the problem comes when you have a single or dual threaded application that doesn't use all the cores.

The unused cores still used power even if they weren't doing any work.

Eventually Intel learned how to downclock individual cores that were not in use, which saved power and decreased heat.

Within the last few years intel learned how to go a bit further and actually downclock cores not in use and overclock the cores that are in use.

This is known as Turbo Boost as mentioned on
https://en.wikipedia.org/wiki/Intel_Turbo_Boost

https://www.anandtech.com/show/10337/the-intel-broadwell-e-review-core-i7-6950x-6900k-6850k-and-6800k-tested-up-to-10-cores/2

Also has a nice review of latest version of Turbo Boost, Turbo Boost Max 3.0.


With this monumental change you are no longer limited to high end processors with low frequencies.


Had the 6 core i5-8600k ran 1 gigahertz slower than the 4 core i5-7600k then your friend would have a case.

https://ark.intel.com/products/126685/Intel-Core-i5-8600K-Processor-9M-Cache-up-to-4_30-GHz
https://ark.intel.com/products/97144/Intel-Core-i5-7600K-Processor-6M-Cache-up-to-4_20-GHz


As you can see the 8600k has a 100 megahertz higher max turbo frequency, but a 200 megahertz lower base frequency.

A lower base is not an issue as long as you have the cooling needed to sustain the boost, which most coolers, even air, are able to do.

In a worst case scenario all cores at 100%, a 200 megahertz difference (about 5% difference) is made up by the addition of 2 cores (50% more cores).