Question On Intel Raptor Lake, any truth to the theory that disabling all e-cores hurts single threaded performance of the p-cores??

[Wolverine2349]

https://www.overclock.net/threads/o...and-discussion.1799628/page-252#post-29071588
View: https://www.reddit.com/r/intel/comments/y9z92t/comment/iwhtura/?context=3


It would not make any sense and I sure hope there is a workaround as I want 0 e-cores enabled as I purchased the Core i9 13900K to be a powerhouse 8 core 16 thread chip as Intel P cores are better performing at same clock speed than AMD Ryzen 7000 Zen 4 cores. And I hate the hybrid arch, but love the P cores Intel has.

So is there really any truth to what Falkentyne at overclock.net or what Glum-Shape-6516 says on Intel reddit in the other thread; or any possible workaround besides having to enable a stupid e-core. This is on Windows 10. I imagine maybe its only a WIN11 problem due to it being thread director aware.

https://fox-laptop.com/pc-component...es-but-without-them-everything-is-only-worse/

That link above suggests it would also be a problem because of thread director on WIN11, but WIN10 no issues as it is not thread director aware. IS there any difference with 13th gen I need to be aware of because if this is an issue and I want only 8 core 16 thread powerhouse chip, I can return it and get a 7700X. I hope I do not have to do that as Intel has better P cores, but I want no e-cores on at all.

And before anyone tells me the e-cores cause no harm on 13th, gen, that is not the question, I simply do not want them but want the 8 P cores and Intel does not sell a separate SKU with 36MB or more L3 cache with 8 well binned P cores.

 

[TerryLaze]

Well it is true if you run enough stuff at the same time that all main cores have something to do, then if you run a single thread heavy thread it will have to share resources with a core that already does stuff.

If you don't run enough stuff then no, you can turn off all of your e-cores you paid good money for, and that don't hurt any performance, just so you can feel better.

 

[Wolverine2349]

Well it is true if you run enough stuff at the same time that all main cores have something to do, then if you run a single thread heavy thread it will have to share resources with a core that already does stuff.

If you don't run enough stuff then no, you can turn off all of your e-cores you paid good money for, and that don't hurt any performance, just so you can feel better.

Yeah of course but is there any truth to it making a 8 core 16 thread CPU worse than it already is like if you have 1 e-core enabled and force everything to run only on P cores and e-core not allowed to do anything, is Falkentine's result true or just an observation?? I would think all e-cores disabled it should be a great 8 core 16 thread CPU better than 7700X.

Of course in a way if something can free resources on P cores by going to an e-core properly (Which only WIN11 can do and not WIN10 at all), then yeah. But of course I already know that but run WIN10 and like more thermal headroom and the extra L3 cache.