For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:oberkut/openSUSE_Tumbleweed/home:oberkut.repo
zypper refresh
zypper install cpupower-gui
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:oberkut/openSUSE_Slowroll/home:oberkut.repo
zypper refresh
zypper install cpupower-gui
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:oberkut/16.0/home:oberkut.repo
zypper refresh
zypper install cpupower-gui