For reference there is a thread in the game's forum's support section
Most of the time the game runs great at highest settings. Essentially there is a huge FPS drop in a certain mode of flying your ship in the game called "super cruise". I've been playing the game since I purchased it only Windows 10 where the problem seems to only reside, ie previous versions of windows don't exhibit this problem. Also it appears to mainly affect the newer AMD cards.
It's been suggested this is a driver error as rolling back to W8.1 drivers alleviates the problem slightly.
I was wondering if anyone owns this game and a newer AMD card (I have a r9 390) could they confirm this issue? If you have a system running Windows 7 or 8/8.1 and provide feedback that would be helpful too. Or if anyone knows how to go about fixing this short of rolling back a driver that would be awesome!