Utility to overclock AMD Radeon GPU's in console mode (linux)

Spied over at github

Utility to overclock AMD Radeon GPU's in console mode (linux)

I suspect this will not work with amdgpu, but should work with fgrlx.

Usage: amdcovc [--help|-?] [--verbose|-v] [-a LIST|--adapters=LIST] [PARAM ...]
Print AMD Overdrive informations if no parameter given.
Set AMD Overdrive parameters (clocks, fanspeeds,...) if any parameter given.

List of parameters:
coreclk[:[ADAPTERS][:LEVEL]]=CLOCK set core clock in MHz
memclk[:[ADAPTERS][:LEVEL]]=CLOCK set memory clock in MHz
vcore[:[ADAPTERS][:LEVEL]]=VOLTAGE set Vddc voltage in Volts
icoreclk[:ADAPTERS]=CLOCK set core clock in MHz for idle level
imemclk[:ADAPTERS]=CLOCK set memory clock in MHz for idle level
ivcore[:ADAPTERS]=VOLTAGE set Vddc voltage in Volts for idle level
fanspeed[:[ADAPTERS][:THID]]=PERCENT set fanspeed in percents
Extra specifiers in parameters:
ADAPTERS adapter (devices) index list (default is 0)
LEVEL performance level (typically 0 or 1, default is last)
THID thermal controller index (must be 0)
You can use 'default' in value place to set default value.
For fanspeed 'default' value force automatic speed setup.

List of options:
-a, --adapters=LIST print informations only for these adapters
-v, --verbose print verbose informations
--version print version
-?, --help print help

and the tried and tested GUI at sourceforge AMDoverdriveCtrl