CPU: Intel i7 4790 (Stock)
GPU: R9 295x2 (Stock)
RAM: Kingston HyperX Beast 16GB 2133CL12
Motherboard: MSI Z87M-Gaming
Storage: Samsung 840 EVO (OS)
Storage: WD 1TB 7200RPM (Game)
Display: Dell P2415Q 4K
VSync ON @ 60 FPS
Obviously as an Early Access title it's bound to have its fair share of issues. To my surprise, performance wasn't as bad as expected, and besides the odd AI glitch, the game actually relatively stable in almost every regard. There are a couple of minor animation issues, namely equipping an item and it being invisible or appearing out of nowhere, none of which are game breaking but more visually galling. If you shoot the AI far enough away, it'll get woefully confused and pace up and down. There have been the odd game crashes this last week, although they've all been confined to the moment you join a server. Most of the time the game loads, however on the odd occasion you'll be greeted by "connection failed" and the game will just shut down. I was also frequently irritated with the game's initial loading screen, which is lengthy the first time around (a good few minutes), and forces you to watch a portion of the game's launch trailer over and over again. Basically, it's Early Access, but feels far less Early Access than ARK and Rust did when they released.
For reference, you can see how your GPU will perform in comparison to ours with this set of charts.
NOTE: Precisely 50% GPU usage means only one GPU was put under load on the 295x2. This may indicate a lack of multi-GPU support.