Very Low Hashrate on R9 270

Mining Mining Support
1

I started mining Zcash using an R9 270. When I started, I had 190-195 h/s. Suddenly, the h/s dropped to about 70. I’m using Claymore 12.6 and have a stable overclock with no voltage tweaks, +20% power limit, 1150mhz core and 1480mhz memory. I tried using versions all the way to 12.3, with no success. I’m mining with flypool.

Some relevant information:

  • start.bat:
    setx GPU_FORCE_64BIT-PIR 1
    setx GPU_MAX_HEAP_SIZE 100
    setx GPU_USE_SYNC_OBJECTS 1
    setx GPU_MAX_ALLOC_PERCENT 100
    setx GPU_SINGLE_ALLOC_PERCENT 100

ZecMiner64.exe -zpool us1-zcash.flypool.org:3333 -zwal t1ZtgufaQ8MAh1oJF8U3TkzQBPHpk45UtuM.DJRubik -zpsw x -i 4

  • It says GPU0 is going to use too high intesity (6), and it sets it to 4, even though I already set it to 4
  • Claymore says it’s connecting to eu1 instead of us1
2

Update: Now it’s at 100-105 h/s.

3

you’re supposed to set this up in the config file NOT the bat file

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