Ok you need to put a load on the gpu in order for GpuZ to read the correct Mhz. In idle your card shows 950Mhz @ 16% GPU load as shown in post # 18. When GPU is under load @ 100%, then GpuZ will show the correct Mhz which is 1070Mhz. Softwares don't actually read 100% accurate, but GpuZ is right in the ballpark of where it's supposed to be.
Your video card is running normally. Enjoy your games.