I would say the build is good.
My thoughts on 2950X vs 2970WX vs 2990WX:
2950X right now is the weakest of the CPU in multithreading, but has the same single-core performance for workstation tasks like viewport or Photoshop, and can actually even be faster here than 2970WX/2990WX.
It's also weaker than the upcoming 16-core Ryzen9 3950X. But there are still reasons to go for weaker Threadripper when stronger Ryzen is available:
- You want to upgrade to Threadripper 3xxxx series when they come. With powerful board like MEG or Alpha, you will be able to support the upcoming 32core "3990WX" (I don't know how they will call it) which will have better architecture and stronger single-core performance than 2990WX, potentially more threads per physical core (rumors). The boards will probably won't be powerful enough for any potential 48/64c versions if such would come, as that will require even more than 16 phases. (28core i9 is good example, the crazy boards have 28 phases, ridiculous but necessary).
- You want 128 GB (8x16) memory. As I wrote above, Ryzen can take 128 GB as well, but only in slower 32GB modules right now on market.
- You could potentially go for even cheaper 1950X if you want to upgrade to 3xxx series in Q4/2019/Q1/2020.
If you don't plan to ever upgrading to 2990WX/3xxx series, than you don't need MEG/Alpha type of boards and can by any cheap <200 Euro board for x399. Even tiny mATX and build yourself a portable PC :- ).
"Corona issues":
- Corona is lot more memory bandwidth demanding than any other synthetic benchmarks on market. Hence the difference between CinebenchR15 score and Corona results. CinebenchR20 is better, but still doesn't utilize much of the memory bandwidth.
- Lot of people bought slow memory or didn't set the memory to correct speed in bios. Threadripper absolutely needs 2933MHz (CL14-CL16). It could potentially benefit little bit from 3200 MHz but this speed is just not stable in 128 GB configuration, and questionably in 64GB configuration when rendering something intensive (like denoising in Corona).
- The whole architecture due to infinity fabric seems to have some issues to reach its true potential. This isn't anything major, the CPUs still kick major ass due to their price but... Corona simply works faster on Intel at the moment ("Conspiracy" = It's on Intel's framework so, but maybe it's not related at all :- ).
- We can wait to see how this behave with Zen2 when someone buys them for Corona. The architecture has improved.
- Maybe, just maybe, X599 platform for Threadrippers 3xxx will feature 8-channel ? Who knows, that would solve some issues with Corona rendering.
Threadripper is still the best choice as 2990WX beats i9 7980XE/9980XE (I have both) and the only Intel which is faster is the crazy expensive 28-core W3175X and even that is very debatable as the chip is so power hungry it absolutely needs water cooling. And that is outside the fact that the chip sells for 3499 Euro, the boards cost 1799 Euro and it requires expensive 6-channel memory kits and either 500 Euro AIO custom made by Asetec, or 900 Euro custom loop like I did for my PCs. So the whole thing is 2-3x more expensive for what 5 perc. better ?
Here is how they compare for those interested:
2990WX @ 4.1 GHz (maximum non-LN2 overclock), roughly 600W output. 34 Seconds in Benchmark.
3175X @ 4.5 GHz (maximum non-LN2 overclock) roughly 1200+ (!!!!) W Output. 30-32 Seconds. The Aquarium chiller than Intel used to cool their exhibition PC had 1600W cooling capacity. This shit is impossible to use under table.
The crazy Intel is 10perc. faster in Corona (and less than 5perc. in everything else) only when you massively overclock it to point where it eats double the juice and outputs 3 times the heat.
It's not contender. 2990WX might not live up to dreamy potential but it still absolutely kicks Intel ass to curb. It's not even comparable for anyone who is not shilling for Intel. 3 times the heat, 3 times the price. So much for fight. Long live the Threadripper :- ).
« Last Edit: 2019-07-31, 18:24:48 by Juraj Talcik »
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