4K60hz problem AMD

Hi everyone , i try force 4k60hz option. CRU and AMD PIXEL CLOCK INSTALLED. (In CRU ,Delete all blocks-creat new Tv Res 4:2:0 4k 60hz) i have 30-59-60 hz option in windows , i accept and black screen. NO SINGNAL :/
ANY tipps? Please help

Fx 8350
Hd7950 oc hdmi 1.4a
thomson 55uc6306 (hdr and 4k 60hz supported)