i swear people who are outsiders here have only clickbait takes; if you've never had to ship GPU code professionally you should just not comment on these things.

the source language has never been the moat. Nvidia sells to hyperscalers. Hyperscalers have armies of kernel authors who have no issue translating shaders by hand (or now with claude). Nvidia's moat is (and will remain for the foreseeable future) the entire stack. you cannot fathom the pain and misery of working on literally any other stack. if you've never debugged a GPU synchronization error or kernel panic due to some GPU firmware bug or fought absolute shit profilers hunting for perf you really have no idea what you're talking about.

EDIT: i can't believe this really requires saying but graphics and compute are not the same domain at all. if you work in graphics for GPU but not compute then you are still way out of your depth commenting. to wit: graphics people do not (and cannot) write CUDA kernels/shaders.

▲

swerner 3 hours ago | parent | next [-]

Most modern graphics is compute. Pixar, Dreamworks, Sony, etc do not use Vulkan to render their movies. It’s CPUs or CUDA.

“graphics people do not (and cannot) write CUDA kernels/shaders” is just not true at all. All it would take to verify that would be things like reading the introduction of the OptiX documentation, a small sample of SIGGRAPH GPU papers or the Blender/Cycles source code.

▲

swerner 4 hours ago | parent | prev [-]

If that is your standard, I do have an idea what I’m talking about.

▲

mathisfun123 4 hours ago | parent [-]

Ya? do tell us about your experience that leads you to believe mere translation is the bottleneck in the market...

▲

swerner 4 hours ago | parent [-]

I’m too old to participate in internet pissing contests.

▲

mathisfun123 3 hours ago | parent [-]

this isn't a "pissing contest"? you made a speculative claim in a public forum and i'm challenging your authority to make such a claim. a "pissing contest" would be if i had said i've shipped hundreds of thousands of lines of shader code into prod and thus you clearly have no idea what you're talking about because you haven't (which is also true).

▲

swerner 3 hours ago | parent | next [-]

I could post the GitHub URLs of all the shader code I wrote that’s running on countless GPUs right now, but what would it change? I’m still just a random guy on the internet with an opinion that happens to be different from your opinion.

You can simply disagree with me, regardless of my experience (or lack thereof).

▲

mathisfun123 3 hours ago | parent [-]

> You can simply disagree with me

that's exactly what i did and made an argument for why i think you're wrong. in response you provided exactly zero substantive remarks other than "i've written shaders" and then accused me of pissing.

also FYI it's clear from your profile that you've only worked on graphics (embree, blender, etc) and not compute. so i'll repeat: you're an outsider and you have absolutely no idea what you're talking about.

▲

swerner 3 hours ago | parent [-]

Outsider to what?

▲

mathisfun123 3 hours ago | parent [-]

to the domain you presume to have authority to comment on

	▲	swerner 3 hours ago \| parent [-]
		What domain do you think I was talking about?

▲

swerner 3 hours ago | parent | prev [-]

If it helps you at all:

“if you've never debugged a GPU synchronization error or kernel panic due to some GPU firmware bug or fought absolute shit profilers hunting for perf”

I have done all of those things. As part of my full time job, for years.

Now that we’ve put all of that aside, can we stop talking about me and go back to discussing moats? What do you think are top three things that are holding customers back from buying AMD GPUs instead of Nvidia GPUs?

I could be misremembering, but I think Jensen Huang himself once called CUDA or the CUDA ecosystem their moat, and it certainly seems to be accepted narrative in the tech press. They may be wrong there, and you sharing your first hand experience here would be helpful to many of us readers here.

	▲	anon291 2 hours ago \| parent [-]
		amd consumer gpus don't support rocm. That is basically the entire reason for Nvidia dominance. All Nvidia cards support cuda even the crappy ones