Hello All.....
Finaly im get the ATI 7970 installed to my PC, im doing few tests, even mixing ATI and NVIDIA card, but it seems that mixing it in same system is not the best solution.
Have tested few simple solution on clean install of Win8, like installing first the 590 then 7970, and ins first the 7970 then 590 and it seems that nvidia is doing something with OpenCL drivers, if im have installed the ATI Open CL first, im get speedbump about 15-20 % for now.
Kris3D, the ATI cards are much faster than NVIDIA, but its it just under the DEPHT MAP subrutine, so as whole project you propably get the 10-20 % speedup depend on the speed of the meshing process.
Over the holidays, will test it much deeper and will let you know........