I’m trying to overclock my dedicated graphics card, but it seems it’s not working.
I’ve found a post on Reddit that someone else overclocked that type of GPU with the following settings:
Core clock (MHz) 1380
Memory clock (MHz) 1850
I followed the instructions on the ArchLinux Wiki > AMDGPU > Overclocking (I’ve set the Kernel parameter
pp_od_clk_voltage gives the following:
$ cd /sys/class/drm/card1/device $ cat pp_od_clk_voltage OD_SCLK: 0: 214MHz 700mV 1: 547MHz 800mV 2: 786MHz 900mV 3: 902MHz 1000mV OD_MCLK: 0: 300MHz 700mV 1: 625MHz 700mV 2: 1500MHz 850mV OD_RANGE: SCLK: 214MHz 902MHz MCLK: 300MHz 1500MHz VDDC: 700mV 1075mV
If I now try to write higher values, I get an invalid arguement error:
# echo 's 3 1000 1000' > pp_od_clk_voltage bash: echo: write error: Invalid argument
Writing lower values is ok. It seems the values have to be in
OD_RANGE, which is documented in the Kernel as follows:
a list of valid ranges for sclk, mclk, and voltage labeled OD_RANGE
Finally, these are my questions:
- Is there a way to adjust the
OD_RANGEfor my GPU?
- Where is this value set/configured?
- Who determines the values for
OD_RANGE? Is it written down in the Kernel or provided by the manufacturer (AMD in this case)?
- Is it a bad idea trying to change this value?