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Ryzen Threadripper Pro 3995WX Spotted

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Re: Ryzen Threadripper Pro 3995WX Spotted

#71

Post by reitzensteinm »

Xylakant wrote: post #66
CSDude wrote: post #41

Earlier quoted context omitted.

Elasticsearch recommends <32GB because of 32-bit per their doc, is it different for coordinator nodes?

The underlying reason is that at around 32GB the JVM internally shifts from 32bit pointers for HEAP management to 64bit. The feature is called compressed object pointers (compressed oops) The increased pointer size uses substantial amounts of RAM, a reasonable estimate is that you need at least ~45GB to not have a loss in total available HEAP. Also, GC cycles get longer the more HEAP you have. However, some workloads…

Lacking value types, larger pointers will probably penalize JVM programs more than their peers.

Re: Ryzen Threadripper Pro 3995WX Spotted

#72

Post by recrof »

hellofunk wrote: post #68

It’s unclear to me what eight channel memory actually means, I’m not used to seeing that mentioned in casual architecture overviews. What’s the benefit of that? Is that something that a programmer must explicitly take advantage of, or is that just an automatic part of the CPU?

from the software standpoint, it's invisible to the programmer. it's about bandwidth of the memory bus. when you have single shared memory lane, bandwidth gets split between memory modules. typically(on most of the consumer hardware) there are 2 memory channels.

Re: Ryzen Threadripper Pro 3995WX Spotted

#73

Post by MaKey »

tinco wrote: post #47
fomine3 wrote: post #6

> The big news is that the Asia website reported the 3995WX is an offering 8-channel DDR4 memory interface, up to 2 TB of it This indicates 3995WX supports not only 8ch but also RDIMM/LRDIMM that's not supported on current Threadripper. It should need a new Socket rather than current TRX40 (TRX80 was rumored a year ago). Threadripper gets closer to EPYC. I expect PCIe lanes limitation still remains for make differenc…

That would be insane. I hope motherboard manufacturers take notice and release an IPMI board for it. We currently run a cluster that has some 3970X's in it and it's super awkward that we couldn't get remote management for them. Asrock has announced availability of one starting august, but it's a little too late for us.

What about the X399D8A-2T from AsRock Rack? It's available since October 2019.

Re: Ryzen Threadripper Pro 3995WX Spotted

#74

Post by tromp »

staticfloat wrote: post #14
Uehreka wrote: post #12

I feel like 64 cores is getting rather close to a tipping point: What workloads are so massively parallel that they can use 64 cores of x86 but can’t use the thousands of CUDA cores on a Quadro card? I’m sure right now there are workloads that just need particular x86 instructions, but that feels like a temporary problem. Am I wrong about that being a temporary problem (that would feel frustrating)? Are these cores j…

One big difference is memory availability; the amount of RAM directly accessible from a 64-core CPU is much larger than that of the thousands of CUDA cores on a Quadro card. Perhaps for many workloads intelligent use of the PCIE bus can make up for that, streaming datasets in/out of the card, but for others, having random access to hundreds of GBs of data may be non-negotiable. I'd be interested to know what workload…

The CuckatooN Proof-of-Work puzzle [1] requires 2^N bits of randomly accessed memory for efficient solving which parallelizes very well. In practice the random access is so slow that an alternative solver using 32 times more memory and mostly sequential access is much faster.

[1] https://github.com/tromp/cuckoo

Re: Ryzen Threadripper Pro 3995WX Spotted

#75

Post by vbezhenar »

Dylan16807 wrote: post #59
forrestthewoods wrote: post #5

Earlier quoted context omitted.

The 64-core 3990x is MSRP $4000. I’d expect this new fangled 3995WX to be that much or more.

And as comparison, the 12-core is $500 and the 16-core is $750, both currently available for 10-15% off.

Those are not Threadrippers. IMO AMD misses one market segment where people want workstation CPUs but not so much cores. I would consider 12-16 core Threadripper with 4 memory channels and more PCI-E lanes with adjusted price.

Re: Ryzen Threadripper Pro 3995WX Spotted

#76

Post by govg »

thdrdt wrote: post #64
dTal wrote: post #39

Earlier quoted context omitted.

CPUs are much more general! Unscientifically, on my 2950X/1070Ti workstation, Cycles takes approximately the same amount of time to raytrace a scene on the CPU vs the GPU. I think this is a great example of a highly parallel workload that is challenging for GPUs due to lack of coherence - extreme props to the Cycles team for making it work on GPU at all. Also, year-on-year performance increases for nVidia GPUs are re…

I'm not sure your CPU will be faster. I'm using Blender on a Ryzen 9 3900x with a RTX 2070S. The CPU is never faster than the GPU. CPU + CUDA is way faster, but when I use OptiX (RTX) it is unbelievable how fast it is. The GPU Raytracer just shines here. The Blender benchmarks: https://opendata.blender.org/

The Nvidia 2xxx series are optimized for ray tracing though, so not sure if comparing with their 1xxx cards make sense.

Re: Ryzen Threadripper Pro 3995WX Spotted

#77

Post by dTal »

thdrdt wrote: post #64
dTal wrote: post #39

Earlier quoted context omitted.

CPUs are much more general! Unscientifically, on my 2950X/1070Ti workstation, Cycles takes approximately the same amount of time to raytrace a scene on the CPU vs the GPU. I think this is a great example of a highly parallel workload that is challenging for GPUs due to lack of coherence - extreme props to the Cycles team for making it work on GPU at all. Also, year-on-year performance increases for nVidia GPUs are re…

I'm not sure your CPU will be faster. I'm using Blender on a Ryzen 9 3900x with a RTX 2070S. The CPU is never faster than the GPU. CPU + CUDA is way faster, but when I use OptiX (RTX) it is unbelievable how fast it is. The GPU Raytracer just shines here. The Blender benchmarks: https://opendata.blender.org/

I don't know, the 3970X has nearly 3 times as many cores as your 3900X. You may be right if pitted against an OptiX GPU, but that's a bit unfair since that entire generation's raison d'etre is raytracing-specific hardware - my point concerned GPGPU, with raytracing as an incidental example. nVidia can't redesign their GPUs for every workload that GPUs struggle with.

Re: Ryzen Threadripper Pro 3995WX Spotted

#78

Post by tinco »

MaKey wrote: post #73
tinco wrote: post #47

Earlier quoted context omitted.

That would be insane. I hope motherboard manufacturers take notice and release an IPMI board for it. We currently run a cluster that has some 3970X's in it and it's super awkward that we couldn't get remote management for them. Asrock has announced availability of one starting august, but it's a little too late for us.

What about the X399D8A-2T from AsRock Rack? It's available since October 2019.

Hm shit, now that you mention it, I didn't even consider X399. The only downside seems to be the lack of support for 3200mhz ddr. In our case that board specifically doesn't have room for the 4th GPU so it's not an option for us.

We've got a weird use case, we're using (black box) software that's sensitive to clock speed, scaling only to about 8 threads until it starts levelling off aggressively (to the point where a 3970X benchmarks as faster than a 3990X). So what we do is we run 4 instances, each with their own GPU and 8 cores assigned to it. I'd be surprised if this makes sense anywhere else (as EPYC has all sorts of other advantages in HPC).

Re: Ryzen Threadripper Pro 3995WX Spotted

#79

Post by secondcoming »

throwaway_pdp09 wrote: post #60
secondcoming wrote: post #54

Earlier quoted context omitted.

The impending doom that is WASM will mean that 'dynamic' and 'interactive' adverts will use all these cores.

What a miserable hopeless post - "they're going to fuck us and what can we do????". Answer: quite a lot, if you have even minimal technical understanding (like, enough to use a blocklist or an ad blocker). Are you incapable even of that?

Yes.

Re: Ryzen Threadripper Pro 3995WX Spotted

#80

Post by thdrdt »

dTal wrote: post #77
thdrdt wrote: post #64

Earlier quoted context omitted.

I'm not sure your CPU will be faster. I'm using Blender on a Ryzen 9 3900x with a RTX 2070S. The CPU is never faster than the GPU. CPU + CUDA is way faster, but when I use OptiX (RTX) it is unbelievable how fast it is. The GPU Raytracer just shines here. The Blender benchmarks: https://opendata.blender.org/

I don't know, the 3970X has nearly 3 times as many cores as your 3900X. You may be right if pitted against an OptiX GPU, but that's a bit unfair since that entire generation's raison d'etre is raytracing-specific hardware - my point concerned GPGPU, with raytracing as an incidental example. nVidia can't redesign their GPUs for every workload that GPUs struggle with.

If you look at the Blender benchmarks you see that the 64 core Threadripper is faster than any GPU. But the price is steep for that CPU (almost $4000). So while CPU's can be faster the question is if it is relevant. Because you still need a GPU next to that Threadripper for some graphics (if you need graphics).
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