Thanks for answers!
I installed MSI Afterburn and my values are:
GPU Clock 1771Mhz
Mem Clock 3802 MHz -> this is strange, becouse this type should have 8008Mhz (if i don’t understand description wrong)
I don’t overclock anything and have default settings still. Which clocks are save? I am sorry for this noob questions, i am beggining with that.
Tomorrow I will try to test Gatelessgate.