When coming from an overflow server into another zone(whether that new zone is overflow or not) it seems my client has a higher probability to crash.
That is just something I have noticed recently since the game population is spreading. During launch I would crash multiple times but I was in overflow a lot. Now I can move easily from zone to zone with a minimal chance of crashing. Yes I still crash and my 32-bit OS doesn’t help.
I have since then underclocked my GPU and have been stable except for when I am leaving an overflow zone.