for quad core CPUs, does it matter whether it's 4 or 8 threads?

[beer is good for migraines]

trying to figure out if a quad core with 8 threads is significantly better for this game than a quad core with 4 threads

[Roasted Bunny]

Well, I think 8 threads should be better. The higher the better!

[Nadeox1]

Depends on the CPU itself.
You can have a low-spec, 8 core CPU, and an high-end 4 core CPU. The latter would perform better at the end.

[beer is good for migraines]

the CPUs i'm considering are equal except that the 8 thread one has 8MB of cache instead of 6.

[Nadeox1]

Models?

[beer is good for migraines]

Intel Core i5-7640X vs. Intel Core i7-7700K
i'll give a URL and some exact text from the webpage so you can CTRL+F it if you want to see them.

http://wccftech.com/intel-skylake-x-core-i9-7920x-7900x-7820x-7800x-x299-leaked/
Text from page: Intel Kaby Lake-X Lineup

[Nadeox1]

It should be better yeah.
Faster clock speeds, HyperThreading (4 Cores / 8 Threads), more L3 cache.

[Los.Injurus.Bob.Blunderton]

hyperthreading only helps when you've got all the cores used or have 'expensive' processes while running quad-core software (Cities Skylines or this with lots of cars, + a media player or streaming software). Skips or hitches that do occur will be more sparse with more cores and less pronounced. There's less lag between different processes. Big difference if you use the heck out of the PC, even if it's things like a web browser open in the background while a quad-core app or game is run, if you don't steam and don't mind closing out a busy web browser etc while playing games, i5 is fine. If you have money, get the i7 or prefferably go with Ryzen 7. More cores = merrier computing, especially being more future-proof. The extra speed of intel 7-series cpu's (7xxx) is almost moot compared to the Ryzen's double-the-cores, especially in this game!

[beer is good for migraines]

^ this
Except I don't recommend recommending Ryzen or Intel over the other. There will be games and gaming situations that benefit from Intel's superior single thread performance and there will be games that benefit from Ryzen's extra cores at more affordable prices. It partyly depends on that great unknown matter of if programmers will ever have the will or capability to make kick-ass 6+ core optimized game engines. This game certainly benefits from that but I mean all the other kinds of action games people play.

But I think that new 6 core Intel CPU out next month will be able to run about 11 cars in BeamNG so I think that will be the CPU for me.