Doubtful. Nobody's reporting issues with 5960Xs, and if it were really a race condition then you would occasionally get crashes even in 4- and 6-core processors

Doubtful. Nobody's reporting issues with 5960Xs, and if it were really a race condition then you would occasionally get crashes even in 4- and 6-core processors. Civ5 is one of the games that can trigger Ryzen segfaults, guessing he has a faulty chip. He should run kill-ryzen and see if his chip is stable. Note that contrary to popular belief, the segfault bug does not "only" affect Linux or compiling workloads (it's a litho fault - these workloads just happen to trigger it) and there is no "safe" date range of first-gen Ryzen chips. Newer chips are more likely to work properly, but a smaller number are still faulty - even some RMA chips, since AMD stopped testing them after a few months. I went through the AMD support thread and pulled out some examples: https://news.ycombinator.com/item?id=17074355 https://news.ycombinator.com/item?id=17074355 Looking through the latest posts in the AMD community thread, at least one user is reporting this even on a second-hand processor, although that's not really enough to make a definitive statement.