true.
just had a quick google, few sporadic reports that the rtx 2060 is also affected by the memory artifacting.
so definitely all RTX cards are affected.
again, what the cause of it isn't actually known (nvidia probs hiding something lol). most seem to blame micron memory, but it appears hynix and sammy vram can get the same artifacts as well.
so whether is the vram, or the actual architecture/tensor cores or memory controller flaw...not really sure.
as i said, 1660ti is newly released (and has even slower memory speed than 2060)...so we'll just have to see how it plays out.
Lets just say there is a reason I haven't bought a Turing card - beyond my 1070 still being adequate for my needs.