--clk_core_mhz=1000 — sets the core frequency after the = sign in MHz.
--clk_core_mv=850 — sets the core voltage after the = sign in mV.
--clk_mem_mhz=1100 — sets the memory frequency after the = sign in MHz.
--clk_mem_mv=950 — sets memory voltage after the = sign in mV. Not suitable for RX 5000 Series and RX 6000 Series graphics cards
--clk_timing=1 — sets memory timing level after the = sign. It may be factory set (unset), 1, or 2. It does not work with all GPUs and drivers! If successful, it may help to get more mega hashes.
If you have multiple settings, set them in a line, separated by a space, e.g:
--clk_core_mhz=1100 --clk_core_mv=875 --clk_mem_mhz=1107 --clk_mem_mv=875 --clk_timing=1
It means: set core frequency at 1100 MHz, set the fixed core voltage at 875 mV, fixed memory frequency at 1107 MHz, set memory voltage at 875 mV, and applied Level 1 memory timings.
If you have several GPUs, separate the settings for each one with a comma (no spaces), in the order in which they are arranged. If your GPU does NOT need to set a value, or does NOT support it, leave just a comma:
--clk_core_mhz=1100,1000,1275,1000 --clk_core_mv=875,850,725,675 --clk_mem_mhz=1107,2100,1820,2130 --clk_mem_mv=875,850,, --clk_timing=,,,1