Working now. At 4k with 199 FPS.
The game caps the FPS to 200 so that it doesn't tax the CPU unnecessarily, but it may be possible that your card can achieve even more than that at 4K. Want to see how deep the rabbit hole goes? If so, open your .GNUstepDefaults file inside the game's GNUstep/Defaults foder and add (or edit, if it already exists) the line:
animation_timer_interval = 0.001;
This will instruct the game to go for 1000 FPS, if it can make it. You probably won't get that far at 4K, but your will max out the performance. So, how many fps do you get?
@gsagostinho: I think it is not practical to add it in options, because v-sync is set once at startup and that's it, it can't be changed later. But setting it with -novsync at the command line is not the only option. You can achieve the same by editing your .GNUstepDefaults and setting
"v-sync" = no;
as the new default startup status.
Ok here we go.
Test result from my machine at 4k resolution.
GPU: EVGA 1070GTX with 8GB Vram
Motherboard: MSI Z270 Gaming Pro Carbon, ATX, S1151, 4xDDR4
Processor: Intel Core i7-7700K, 4.2Ghz, 8MB, S1151
Flying toward sun: FPS fluctuating between 547 and 801 FPS
Black space flying toward nothing: 889 FPS
Flying toward planet: 578 FPS
At Zaonce Wichpoint 422FPS at 80 entities
At Jumpspeed J toward nothing 992 FPS
Docking 750+ FPS
For P.A. Groove's music check
Famous Planets v 2.7. (for Povray)