I don't think it's an error with the drivers, however anything is possible. I am also crashing on an R9 280. Coerthas actually had a weird example where I can look away from the town and gain my FPS back, but if I turned back it'd get destroyed. I've also had LOD Streaming on for a long time, crashing still occurs teleporting anywhere I've noticed, but mostly in Coerthas and Mor Dhona. I haven't had LOD distant models on, but I'll give it a shot see if I improve. I'm pretty sure my machine is more than capable of this game.

Specs:
OS: Windows 8.1 Pro 64 Bit
CPU: AMD FX-6300
GPU: XFX R9 280 (14.7 Beta Drivers)
RAM: 8GB