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-582516533 > `We don't need 3.5, because code compiled for 3.0 also runs on 3.5 hardware` - I do not believe that is the case, those archs are not binary compatible. I would say that the better choice would be to remove SM3.0 (as SM3.5 is still accessible via p2 AWS instance). We do not need PTX for 7.0 if we include PTX for 7.5. Why is this wrong? Binary forward compatibility is explicitly described in Nvidia docs https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#binary-compatibility
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