I have a late 2009 Apple 27" iMac. It came with an ATI Radeon HD 4850 512 MB. The GPU failed in 2015. After 6 years I guess that's not too bad. It was replaced by the Apple Store. But, the replacement HD 4850 has just failed – after only 3 years. Is 3 years a good life for an HD 4850 ? If not, are all HD 4850s faulty ?
Should I look for a different model to replace the HD 4850 ?