Are astonishing. My XFX ATI Radeon HD 6770 in my HP desktop just crapped out on me, the ball baring just went. I've only had this GPU for about 2 1/2 years. On the other hand, all my PPC Macs mostly still work with the stock components and the ATI Radeon 9800XT that was originally in my G5 still works great. Just goes to show how much effort Apple puts into their product's.