so...
- ati official driver do not work with windows 7, but work good on windows 10 (i have win7)
- unofficial modded driver work good on win7 and win 10 (but can not be sure if it is clean)
- both drivers break overclock compability, wattool and afterburner not work (even with new beta afterburner it not change everything)
- overdriveNtool work for new driver, have voltage but have no offset
- peoples saw increase of power, but it is just result of broken oc tools, they do not change voltage
conclusion - i will stay on old driver and wait for problems to go away ..