leezu commented on issue #17521: cmake: don't build PTX and 3.5 arch if cuda arch detection fails URL: https://github.com/apache/incubator-mxnet/pull/17521#issuecomment-584796489 > Ok, I think you are right that 3.0 will in fact work for 3.5. That said, again, do we actually care about SM 3.0 (and 5.0 for that matter, as it was used only in a few GPUs)? I'm not sure if we have any data about the distribution of SMs of our users. Thus my main motivation here is to preserve backwards compatibility. Also, this change does not affect our binary distribution (python wheels), but just the default for manual build-from-source builds. So I expect if performance is important to whomever is doing the build, they will figure out to set the right architecture. Thus choosing a conservative default would be fine? Is there any data about how large the performance difference is between running 3.0 binary compared to 3.5 binary on a 3.5 architecture?
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