I have the MSI R5670 running on Windows 7 64bits versions as well. My setup also show really bad
flicker issue using driver supply by MSI. Download CCC 10.2 from ATI and it help some what. I am usign CCC 10.3 beta now and it make a big differnt. Still every now and then still get some a narrow band of flicker at the verytop of my screen (1680 x 1050).