HD 6770M 512 MB
Hello, I have a mid 2011 imac 27", 2,7 GHz Intel Core i5, with a HD 6770M 512 MB graphic board.
I am experiencing exactly the same problems as the AMD Radeon 6970M, that is under Apple replacement program. Is it also a known problem?
When I make something heavy for the video card (e.g. a quick zoom in and out of a large picture in raw) the image starts blinking, the arrow of the mouse becomes a colored square and then the computer stops with this coloured scenario frozen. Then the only option is to switch it off.
Any help?
iMac (27-inch Mid 2011), OS X Yosemite (10.10.2), 2,7 GHz i5, HD 6770M 512 MB