Hey everyone So i'm in a bit of a trouble with my mac pro (late 2013). One night i noticed my mac pro was acting very strange, I was getting screen tearing, random reboots, frozen graphics, weird error messages... etc. I had no idea what was going on and I did literally EVERYTHING to get it fixed. I have tried: Reinstalling the OS (10.10 and 10.11) SMC reset PRAM reset Run Apple System Diagnotics Run Built in hardware test Run clean my mac Verbose mode, single user mode, and safe mode. boot from external drive It got so bad to the point where i couldn't even boot into recovery. I eventually took the machine to the apple store where they determined it was a faulty GPU. They replaced GPU A within 2 HOURS, which was very impressive. The machine worked fine for about a week and then today, same issues started happening. My Mac which is only about 6 months old is currently at the Apple store being serviced for the second time. Hopefully its actually fixed this time but back to my original question, I'm not sure how many people on this forum actually have a nMP, but am i just one in a million for this to happen to or is this common? I've been doing a lot of reading on the issue and it appears that many people are suffering from defective d300, d500, or d700 cpu cards. This is supposed to be the best machine apple has built to date, and part of me feels like i just spent $4000 on a destined paper weight.