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
Performance overall was stellar, though the game was not without its occasional peculiarities. My main gripe was tooltips bugging out constantly, which while not game breaking, did become immensely infuriating after two dozen hours. It would show icons but text would be invisible, and swishing my mouse around would eventually reveal the text. I also noticed that during ship battles the game would pause for a millisecond when zoomed in, and then resume combat. Again, not game breaking, or a result of an FPS drop, just little oddities. Besides this, the game ran at 60 FPS solid even on 4K, so can't complain about optimisation. It's just sad that the FPS cap was implemented.
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.