[sliken]

The I9-7900 seems like a rather strange CPU to compare a video card. Why not a Intel xeon with 50% more memory bandwidth? Or an AMD Epyc with 100% more bandwidth? Not hard to get 2-3x the cores (in a single socket) and double the bandwidth/cores with a dual socket.

That way you get pretty good memory bandwidth, can directly access much more ram (1TB easy), and you can run a wide variety of codes (not just GPU codes).

Sure the Titan X is great if your code A) doesn't communicate B) fits entirely in system memory and C) runs on CUDA. Of course the real world often intrudes with PCI-e latency and memory limitations.

Not saying GPUs don't have their place, but it's easy to overstate their usefulness.

[dragontamer]

I picked two $1000 components from memory. I recognize that there are other choices out there, but $1000 is a nice round number and I honestly don't know the market any more to pick another price point.

If you know the name of a Xeon Skylake-server, and its memory capacity, that is roughly $1000 (and therefore comparable to a Titan X in MSRP cost), you are welcome to rerun the analysis yourself.

I can't do that because I don't know the capabilities of the Xeon Skylake servers from memory, nor their prices. And I'm certainly not going to spend 30 minutes googling this information for other people's sake.

What I will say is that the i9-7900x is a Skylake-server part with AVX512 support and Quad-channel memory. That's way stronger than a typical desktop. And I think assuming Quad-Channel 4xDDR4-3200MHz is pretty fair, all else considered.