Issues include crashes, BSODs, artifacts, and even complete card failure. Sources at AIBs said RMAs were very low so it seems the issue is solely with the $1,199 Founders Edition cards from NVIDIA.
Unfortunately, NVIDIA isn't sharing a lot of details. In a new forum post, the company explains the problem is caused by "limited test escapes":
Limited test escapes from early boards caused the issues some customers have experienced with RTX 2080 Ti Founders Edition.This seems to mean that cards that should have failed NVIDIA's QA testing ended up being sold to consumers.
We stand ready to help any customers who are experiencing problems.
Please visit www.nvidia.com/support to chat live with the NVIDIA tech support team (or to send us an email) and we’ll take care of it.