a3000 tab is using SGX544MP2 so the default setting that would be detected by the game is high setting, but in other hand, the processors itself only able to run low to medium quality graphic because its quiet low speed 1,2 even quad-core basis, so its make some of games quiet laggy.
In your case, downloar RR3 setting on the play store, and change the game setting at low to medium 2 its up to you, i guarantee youre gonna get 20-30+ fps
in other games if you meet semiliar problem, you can use gltool / chainfire, but i recommend gltool its safter, and check the glshader optimization for better performance, and use fake gpu, downgrade the gpu to tegra 2 or SGX540 its working for most game
hope it'll help
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