Comments on: NVIDIA Tesla K40 “Atlas” GPU Accelerator (Kepler GK110b) Up Close https://www.microway.com/hpc-tech-tips/nvidia-tesla-k40-atlas-gpu-accelerator-kepler-gk110b-up-close/ We Speak HPC & AI Tue, 28 May 2024 16:33:45 +0000 hourly 1 https://wordpress.org/?v=6.7.1 By: Eliot Eshelman https://www.microway.com/hpc-tech-tips/nvidia-tesla-k40-atlas-gpu-accelerator-kepler-gk110b-up-close/#comment-33 Tue, 20 May 2014 19:19:35 +0000 http://https://www.microway.com/?p=3238#comment-33 It’s worth taking careful note of the following: GPU data transfer speeds depend upon both the memory clock and graphics clock. A Tesla K40 GPU with GPU Boost at full speed can achieve a 10% to 15% transfer speed improvement:

[root@node4 tests]# bandwidthTest --memory=pinned --device=0
[CUDA Bandwidth Test] - Starting...
Running on...

Device 0: Tesla K40m
Quick Mode

Host to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 11296.7

Device to Host Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 11795.1

Device to Device Bandwidth, 1 Device(s)
PINNED Memory Transfers
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 229481.5

Result = PASS

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