AMD Radeon HD 6970M upgrade
Hello guys,
My iMac had a problem with its GPU card and i am planning on replacing it myself since getting it replaced at the store is too expensive. Are there any graphics card better than the AMD Radeon HD 6970M and is compatible with this iMac.
Thanks
iMac (27-inch Mid 2011), OS X El Capitan (10.11.3)