help with my nvida shield

[sword n shield]

Hi I'm new to threads and was being stumped by ppsspp and was wondering if I can get some help and maybe give some info on my shield I can play dbz shin budikai at 85 fps and vfps at 90 but when I try my other game dbz tag team I can't get past 15 fps plse any ideas I have a tegra 4 quad core running at 2.0 processing speed and 3000 mbs of random access memory and running jelly bean plse any help from dev team or anyone who knows what they are doing plse