C:\ProgramData\NVIDIA Corporation\CUDA Samples\v11.3\bin\win64\Debug>nvcc -V
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2021 NVIDIA Corporation
Built on Sun_Mar_21_19:24:09_Pacific_Daylight_Time_2021
Cuda compilation tools, release 11.3, V11.3.58
Build cuda_11.3.r11.3/compiler.29745058_0
C:\ProgramData\NVIDIA Corporation\CUDA Samples\v11.3\bin\win64\Debug>simpleP2P
[simpleP2P] – Starting…
Checking for multiple GPUs…
CUDA-capable device count: 2
Checking GPU(s) for support of peer to peer memory access…
> Peer access from NVIDIA TITAN RTX (GPU0) -> NVIDIA TITAN RTX (GPU1) : Yes
> Peer access from NVIDIA TITAN RTX (GPU1) -> NVIDIA TITAN RTX (GPU0) : Yes
Enabling peer access between GPU0 and GPU1…
Allocating buffers (64MB on GPU0, GPU1 and CPU Host)…
Creating event handles…
cudaMemcpyPeer / cudaMemcpy between GPU0 and GPU1: 40.86GB/s
Preparing host buffer and memcpy to GPU0…
Run kernel on GPU1, taking source data from GPU0 and writing to GPU1…
Run kernel on GPU0, taking source data from GPU1 and writing to GPU0…
Copy data back to host from GPU0 and verify results…
Disabling peer access…
Shutting down…
Test passed
C:\ProgramData\NVIDIA Corporation\CUDA Samples\v11.3\bin\win64\Debug>
1,5slot Windows10 pro titan rtx x2 3995wx cuda11.3 simpleP2P