stefan_w

poor transfer

Discussion created by stefan_w on Feb 15, 2010
Latest reply on Jul 30, 2010 by pedela

If I execute NVIDIA's oclBandWidth Test with my 5970 I achieve very poor results compared to a NVIDIA GTX 260:

 

5970:

oclBandwidthTest.exe Starting...

WARNING: NVIDIA OpenCL platform not found - defaulting to first platform!

Running on...

Device Cypress
Quick Mode

Host to Device Bandwidth, 1 Device(s), Paged memory, direct access
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 1575.1

Device to Host Bandwidth, 1 Device(s), Paged memory, direct access
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 2454.8

Device to Device Bandwidth, 1 Device(s)
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 49974.0

 

NVIDIA GTX 260
./oclBandwidthTest Starting...

Running on...

Device GeForce GTX 260
Quick Mode

Host to Device Bandwidth, 1 Device(s), Paged memory, direct access
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 5251.1

Device to Host Bandwidth, 1 Device(s), Paged memory, direct access
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 5256.2

Device to Device Bandwidth, 1 Device(s)
Transfer Size (Bytes) Bandwidth(MB/s)
33554432 91350.3


TEST PASSED

 

 

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