Hello, please can someone help me to solve problem with xfx 470 8GB card from mining?

I replaced 2 memory banks and the video card starts to run again in windows, but it refuse to mine. The problem is, that I cant see the actual GPU core temp.

In GPU-Z - gpu clock: 0MHz, memory clock: 0Mhz, GPU tempretature: 0C

Do you know where to start digging to solve this?

Thanks