By: Dummond D. Slow (mental.delete@this.protozoa.us), August 10, 2019 1:57 pm
Room: Moderated Discussions
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.
> 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.