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Re:All AMD ThreadRipper CPU's will have 64 PCIe Lanes by floatboth on Wednesday May 31, 2017 @01:53PM (#14454516)
"CUDA" is not a particular application. You could very well be doing something with CUDA that does extremely little data transfer to/from the host, but a lot of computation on the GPU. Like mining :D

Also, host to device can be bottlenecked by memory speed on either side.

Re:All AMD ThreadRipper CPU's will have 64 PCIe Lanes by shaklee3 on Wednesday May 31, 2017 @03:37PM (#14455275)
CUDA meaning GPGPU. All I was pointing out is that there is definitely a bandwidth doubling going from 8 to 16 lanes. It's used extremely often by people using the cards for compute. Mining may not have that issue, but deep learning and other applications do.