What Windows tasks benefit from single core speed?

[b22222c]

I read that for instance 8700k is the "king" of single core performance... There are processors with a lot of cores and more expensive like 7820X or 7900X but loose to 8700k in single core benchmarks...
I know that tasks like video editing benefit from multicore performance but what tasks in windows benefit from single core? Thanks

 

[GhislainG]

Only applications that are single threaded. You should always choose a CPU based on your main requirements, not for peak single thread benchmarks.

 

[b22222c]

Thats why i am asking what applications are single threaded? I use browsing chrome with 30 open tabs, photoshop, illustrator, word, open pdfs, open folders in windows... This are more single or multi thread applications? Thanks

 

[GhislainG]

Most are multi thread; you can easily see that in Task Manager if you dispaly the Threads column. Currently Chrome (3 tabs) uses 137 threads on my system. Very few applications are single threaded.

 

[b22222c]

I was thinking that browsing the web was a single core thing...
Só i7 7820x is better for me that i7 8700k because have 2 more cores and 4 more threaded?
My computer will be faster doingvthis stuff with 7820x?

 

[GhislainG]

Only if utilization of the i7 8700K is very high while performing some tasks. It won't make a difference in Chrome because you can't view all tabs at the same time, Explorer, etc. If you eran a living with your system, then the i7 7820X may be worth the extra cost.

http://www.tomshardware.com/reviews/amd-ryzen-threadripper-1950x-cpu,5167-9.html The 8700K is not on the list, but the 7700K is faster than the 7820K in several tasks, including Illustrator.

https://www.anandtech.com/bench/product/1904?vs=2025 (8700K at 3.7 GHz)
https://www.anandtech.com/bench/product/1904?vs=2047 (8700K overclocked to 4.4 GHz)

Having more cores doesn't always mean better performance at all tasks.

 

[b22222c]

Thanks GhislainG

 

[GhislainG]

Personally I'd go with the 8700K because the additional cost of the 7820X and motherboard is difficult to justify, but your requirements may be different.