By: anon2 (omg.delete@this.fastix.com), August 11, 2019 12:33 am
Room: Moderated Discussions
Dummond D. Slow (mental.delete@this.protozoa.us) on August 10, 2019 1:57 pm wrote:
> john (john.ral8.delete@this.gmail.com) on August 10, 2019 10:54 am wrote:
> > Your 9900K can easily do 5 GHz on a few cores and 4.7 GHz on all cores. You can also
> > most likely reliability overclock the whole chip to >= 5 GHz on all cores. Although
> > the 3950X isn't out yet, the 3900X can't even get to the advertised 4.6 GHz no matter
> > what setup/cooling. Most people have a hard time getting to 4.4 on a single core.
> >
> > And in ~October Comet Lake will bring more cores and even higher
> > frequency. I am sure those clocks will certainly be attainable.
>
> Comet Lake looks like it will up multithread performance, but at the cost of close to
> linear increase in power consumption, so dunno, if 9900K currently goes up to 150-60 W,
> now it might be up to 180-200 W when AVX2 (the socket specs ask for +25 % currents).
>
> You kinda never know how much will the Intel chip pull, whereas the 105W category
> of AMD chips does have a hard limit, that it tries to reach (143 W; 88 W for 65W TDP
> SKUs), so R9 3950X should not go over that when compiling and all cores active.
>
> In any case, single thread is important, but not when the competing CPU only has it 5% better, while it
> loses in multithread by 30-40 %. If it is like that, the multithread becomes the more important thing.
When you can take advantage of massive MT. Rendering? 0.5% of the market. Instead of you will have more cores without noticeable difference in performance on average desktop.
> john (john.ral8.delete@this.gmail.com) on August 10, 2019 10:54 am wrote:
> > Your 9900K can easily do 5 GHz on a few cores and 4.7 GHz on all cores. You can also
> > most likely reliability overclock the whole chip to >= 5 GHz on all cores. Although
> > the 3950X isn't out yet, the 3900X can't even get to the advertised 4.6 GHz no matter
> > what setup/cooling. Most people have a hard time getting to 4.4 on a single core.
> >
> > And in ~October Comet Lake will bring more cores and even higher
> > frequency. I am sure those clocks will certainly be attainable.
>
> Comet Lake looks like it will up multithread performance, but at the cost of close to
> linear increase in power consumption, so dunno, if 9900K currently goes up to 150-60 W,
> now it might be up to 180-200 W when AVX2 (the socket specs ask for +25 % currents).
>
> You kinda never know how much will the Intel chip pull, whereas the 105W category
> of AMD chips does have a hard limit, that it tries to reach (143 W; 88 W for 65W TDP
> SKUs), so R9 3950X should not go over that when compiling and all cores active.
>
> In any case, single thread is important, but not when the competing CPU only has it 5% better, while it
> loses in multithread by 30-40 %. If it is like that, the multithread becomes the more important thing.
When you can take advantage of massive MT. Rendering? 0.5% of the market. Instead of you will have more cores without noticeable difference in performance on average desktop.
