TalkChess.com

gogamoga wrote: ↑Fri Aug 17, 2018 5:43 pm This is the best I could come up with

The real differences are not nearly so large.
That is because you will need a whole machine to do chess, and not just a CPU.
So when you add in all the other stuff, we are talking about $6000 instead of $4500.
So the ratios do not look that bad in the end.

And always get the really big power supply. That way, you can plug in the huge GPU(s) when it comes along and things like that.

There is an enhanced test about 2990WX on
https://www.techspot.com/review/1678-am ... 0wx-2950x/
Their results prove 2990wx is good for no memory intensive applications.
So for servers it is bad choice but for rendering, for video games and for chess engines it is very good CPU.

corres wrote: ↑Sat Aug 18, 2018 11:07 am There is an enhanced test about 2990WX on
https://www.techspot.com/review/1678-am ... 0wx-2950x/
Their results prove 2990wx is good for no memory intensive applications.
So for servers it is bad choice but for rendering, for video games and for chess engines it is very good CPU.

All we care about on this site is chess performance. Its a winner.

Leo wrote: ↑Sat Aug 18, 2018 4:38 pm

corres wrote: ↑Sat Aug 18, 2018 11:07 am There is an enhanced test about 2990WX on
https://www.techspot.com/review/1678-am ... 0wx-2950x/
Their results prove 2990wx is good for no memory intensive applications.
So for servers it is bad choice but for rendering, for video games and for chess engines it is very good CPU.

All we care about on this site is chess performance. Its a winner.

The exact chess performance is engine dependent too. Generally in comparison to Threadripper 1950x you can expect about 40 Elo plus - without any test.
I hope 2990x will work more effectively on bmi2 engines than 1950x does it.

corres wrote: ↑Sat Aug 18, 2018 10:43 pm

Leo wrote: ↑Sat Aug 18, 2018 4:38 pm

corres wrote: ↑Sat Aug 18, 2018 11:07 am There is an enhanced test about 2990WX on
https://www.techspot.com/review/1678-am ... 0wx-2950x/
Their results prove 2990wx is good for no memory intensive applications.
So for servers it is bad choice but for rendering, for video games and for chess engines it is very good CPU.

All we care about on this site is chess performance. Its a winner.

The exact chess performance is engine dependent too. Generally in comparison to Threadripper 1950x you can expect about 40 Elo plus - without any test.
I hope 2990x will work more effectively on bmi2 engines than 1950x does it.

Afaik BMI2 is still slow as molasses, and AVX-512 still missing. Zen+ is just a tiny improvement over Zen, hopefully these things will be fixed next year when Zen2 arrives.

I thought I read somewhere that BMI is 'only' 32bit.
Certainly popcnt faster on Ryzen.

gogamoga wrote: ↑Fri Aug 17, 2018 5:43 pm This is the best I could come up with

What does this chart mean? I don't understand it.

Leo wrote: ↑Tue Aug 21, 2018 4:17 pm

gogamoga wrote: ↑Fri Aug 17, 2018 5:43 pm This is the best I could come up with

What does this chart mean? I don't understand it.

Column C is engine speed in millions of nodes per second, searching from the starting position of a chess game. Not sure what engine. Not sure if speed is recorded at a particular depth, or represents a limiting value. Am assuming the number of search threads matches the number of (physical?) cores on the chip.

Column D is 100 * (Column C) / (Column B).

zullil wrote: ↑Tue Aug 21, 2018 4:50 pm

Leo wrote: ↑Tue Aug 21, 2018 4:17 pm

gogamoga wrote: ↑Fri Aug 17, 2018 5:43 pm This is the best I could come up with

What does this chart mean? I don't understand it.

Column C is engine speed in millions of nodes per second, searching from the starting position of a chess game. Not sure what engine. Not sure if speed is recorded at a particular depth, or represents a limiting value. Am assuming the number of search threads matches the number of (physical?) cores on the chip.

Column D is 100 * (Column C) / (Column B).

Thanks. You cleared it up.