Do not worry, if you can run Tanki at decent FPS then you will be able to run Tanki X at decent FPS
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System requirements for Tanki (recomended):
Processor: Intel Core i3-i5, or other processor with clock rate over 2.33 GHz.
RAM: 4096 mb.
Graphics memory: 1024 mb.
OS: Windows XP/Vista/7/8/10, Mac OS X 10.5.8+, and Linux.
System requirements for Tanki X:
Processor: Intel Core i3.
RAM: 4 Gigabytes of RAM.
Graphics: Intel HD graphics 4000.
OS: Windows, Mac, Linux, Andriod, and iOS.
With these specifications, you should receive a stable 40 frames per second in a full 10 versus 10 battle.
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Not much difference in system requirements