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8GB RX580 Global Memory Size reports only 6GB??

Question asked by theminingking on Jan 31, 2018
Latest reply on Feb 2, 2018 by theminingking

Something seems off...

 

if I execute:

 

    ethminer -G --list-devices

It reports:

 

    [0] [0] Ellesmere 
        CL_DEVICE_TYPE: GPU
        CL_DEVICE_GLOBAL_MEM_SIZE: 5975805952
        CL_DEVICE_MAX_MEM_ALLOC_SIZE: 4244635648
        CL_DEVICE_MAX_WORK_GROUP_SIZE: 256

Similarly,

 

    /opt/amdgpu-pro/bin/clinfo

reports

 

    ...
    Global memory size: 5975805952
    Constant buffer size: 4244635648
    ...

 

These cards are supposed to have 8GB of onboard memory. I'd expect something like this:

 

    CL_DEVICE_GLOBAL_MEM_SIZE: 8451543040

 

Any insight?

  • Ubuntu 16.04
  • AMDGPU-PRO 17.40

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