:o that’s odd, your system specs?
i got: intel i5-3210M, amd 7670M, 8gb ram
and other ue3 engine games run just fine
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i7 4770k OC’d to 4.6ghz, gtx780 (no OC) and I’m running the game at 1080p but I have all advanced options off or turned down except decals. I’m used to playing lego quake 3 so it’s habit to just turn everything down.
You should do what I suggested in another thread and run Open Hardware Monitor when you play and take note of your CPU temp and CPU speed and if it holds steady at one higher temp and whether it is running at max speed or not (probably not). If so that means that your CPU is most likely getting to a point where it starts throttling you and causing these issues (which then get alleviated when you restart the system or game). If that is the case you might want to look into alternative cooling solutions. DB likes to push your CPU a bit more than other UE games I’ve noticed but it scales REALLY well with overclocks.
If you can’t break 60fps it’s because you have Vsync turned on. Which is also probably causing you input lag as well.
and ati dual graphics systems just little like boosts 2 graph cards and even prosessor helps whit their performace i’m not really sure how it works in reality
Worry not 
