1 Reply Latest reply on Feb 10, 2010 4:09 AM by genaganna

    PCI Express Bandwidth

    iAndrei
      Throughput at copying from host to device - 50 MB/c???. From device to host - 2300 MB/c (normal). Comments?
      Test NVIDIA oclBandwidthTest.
      System:
      AMD Stream 2.0
      Driver 9.12 Hotfix.
      PCI Express 2.0
      X58 i7-920
      ASUS P6T
        • PCI Express Bandwidth
          genaganna

           

          Originally posted by: iAndrei Throughput at copying from host to device - 50 MB/c???. From device to host - 2300 MB/c (normal). Comments? Test NVIDIA oclBandwidthTest. System: AMD Stream 2.0 Driver 9.12 Hotfix. PCI Express 2.0 X58 i7-920 ASUS P6T


          Could you please post your complete output here? Which GPU you have.

          This is what i am getting on my system

          For GPU

          ====================================================

          oclBandwidthTest.exe Starting...

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

          Running on...

           Device Juniper
           Quick Mode

           Host to Device Bandwidth, 1 Device(s), Paged memory, direct access
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     1448.4

           Device to Host Bandwidth, 1 Device(s), Paged memory, direct access
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     1350.8

           Device to Device Bandwidth, 1 Device(s)
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     28016.2

          ====================================================

          For CPU

          ====================================================

          oclBandwidthTest.exe Starting...


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

          Running on...

           Device AMD Phenom(tm) 9650 Quad-Core Processor
           Quick Mode

           Host to Device Bandwidth, 1 Device(s), Paged memory, direct access
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     2257.7

           Device to Host Bandwidth, 1 Device(s), Paged memory, direct access
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     2298.1

           Device to Device Bandwidth, 1 Device(s)
             Transfer Size (Bytes)        Bandwidth(MB/s)
             33554432                     4417.6

          ====================================================