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Ryzen Threadripper Pro 3995WX Spotted

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Re: Ryzen Threadripper Pro 3995WX Spotted

#11

Post by simcop2387 »

mcraiha wrote: post #8
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.

CPU and motherboard prices aren't really relevant since RAM is so expensive. And only real reason for getting this instead of 3990x is that you need e.g. 1 terabyte of RAM. https://www.amazon.com/Tech-12x128GB-2933MHz-PC4-23400-288-P...

There might be some other cases for less ram. If the rumor that it supports rdimm or lrdimm modules is true then it could enable much easier ecc support since there are not a lot of ecc udimm options out there

Re: Ryzen Threadripper Pro 3995WX Spotted

#12

Post by Uehreka »

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 just that much faster than CUDA cores? What else am I missing here?

I often hear people talk about getting CPUs like this for deep learning research, but all the deep learning work I’ve done goes straight to CUDA and lands on my GPU.

Re: Ryzen Threadripper Pro 3995WX Spotted

#13

Post by photon12 »

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…

Running multiple parallel VMs with Xen or KVM is a plausible example.

Re: Ryzen Threadripper Pro 3995WX Spotted

#14

Post by staticfloat »

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 workloads truly require that; most simulation solvers that I can think of that require large amounts of RAM are working on a discretized spatial grid, and the physical laws they're simulating are fairly "local"; e.g. you can process one area then move on to the next, in a nice stencil operation. This lends itself well to both parallelization and a sort of data-locality, so you can stream the necessary pieces of data in to the cores in an orderly fashion. I don't know what kinds of massively parallelizable workloads require much more random access of memory.

Re: Ryzen Threadripper Pro 3995WX Spotted

#15

Post by [deleted] »

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…

[deleted]

Re: Ryzen Threadripper Pro 3995WX Spotted

#17

Post by bitL »

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…

Reinforcement Learning, in-memory databases, number crunching, raytracing/animation.

Re: Ryzen Threadripper Pro 3995WX Spotted

#18

Post by choeger »

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…

DAE and ODE simulators do not work with that spatial distribution.

Re: Ryzen Threadripper Pro 3995WX Spotted

#19

Post by loser777 »

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…

In a single workstation form-factor, once you get enough powerful GPUs, it takes a good amount of CPU power to feed them, even for pure CNNs that GPUs are supposed to be great at. Think data augmentation for training, etc.

Re: Ryzen Threadripper Pro 3995WX Spotted

#20

Post by choeger »

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 use case that comes to mind is compilation of languages like C/C++, where you have many heterogeneous, independent, long-running tasks.
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