In the Readme file of Claymore's miner I read the following:
For AMD cards, set the following environment variables, especially if you have 2GB cards:
GPU_FORCE_64BIT_PTR 0
GPU_MAX_HEAP_SIZE 100
GPU_USE_SYNC_OBJECTS 1
GPU_MAX_ALLOC_PERCENT 100
GPU_SINGLE_ALLOC_PERCENT 100
Are these environment variables required for Nvidia cards as well, and where can I find the description of these variables?
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Answers
In Windows 10 is easy to set it permanently in Control Panel\System and Security\System\Advanced\Environment Variables.
What about Linux? Are these settings also required? How and where to set them permanently?
he told u what each thing does
ive never really looked just kinda trusted the miner devs
good to know about the sync objects and ptr
might not even need those as the reason those were put in were for older GCN amd cards
heap size and alloc are self explanatory
In the ReadMe file Claymore says: "For AMD cards, set the following environment variables..."
Do you know if these environment variables are useful for Nvidia cards as well, or are they AMD specific?
i said what was needed or not in my comment
"good to know about the sync objects and ptr
might not even need those as the reason those were put in were for older GCN amd cards
heap size and alloc are self explanatory"
This was a Yes or No question...
A "legendary contributor" at Bitcointalk forum confirmed that these environment variables are for AMD only (picture below).
I will try mining without these on Nvidia rig to make sure.
older nvidia cards might need some of these strings
newer prolly not
back when eth was launched 750ti needed the mem alloc strings to generate the growing dag
its dependent on hardware and drivers
when in doubt try it out
I am not an expert, but if these variables are for OpenCL applications supported by AMD, I doubt they make any difference for Nvidia cards that use CUDA.
Is values of these parameters/variables (here stated) optimal for every AMD Radeon card ?
Or does every card need specific values of these or another variables ?
What parameters/variables have main influence on MH/s ?
What are optimal settings for AMD Radeon 4 GB cards ?
Thanks for any comments.