Is GTX 680 Capable of Concurrent Data Transfer

cuda, cuda-streams, gpu

Solution

Dual copy engines are available on Tesla cards and modules:

http://www.nvidia.com/object/why-choose-tesla.html

http://www.nvidia.com/docs/IO/43395/NV-DS-Tesla-C2075.pdf

Also, some Quadro models provide dual copy engines, e.g.:

http://www.nvidia.com/docs/IO/40049/Dual_copy_engines.pdf

http://www.nvidia.com/object/quadro-k5000.html

Problem

I expected that GTX 680 (which is one of the latest version of GPUs) is capable of concurrent data transfer (concurrent data transfer in both direction). But when I run cuda SDK "Device Query", the test result of the term "Concurrent copy and execution" is "Yes with 1 copy engine", and it means that the GPU can not do concurrent data transfer. I wonder if my testing result also happens to you? And can you share with me which devices are capable of concurrent data transfer? Thanks!

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