Minimum hardware requirement for Android

[Trqrrhmn]

I apologize if this has been already answered, but I need to know what would be the minimum hardware requirement for running PPSSPP on android.

I have a 7-inch tablet running Android 4.0.4 with a Cortex A8 1.5 Ghtz Dual Core Processor and a Mali-400MP GPU, but most games I've played ran extremely slow. Even less demanding games like Harvest Moon Hero of Leaf Valley, Lumines, Loco Roco, Patapon was slow. More demanding 3d games like Crisis Core was practically unplayable.

I understand that some users have managed to run 3d PSP games on their android devices on full speed. Under the current condition, what sort of android hardware would be the minimum requirement to run PSP games in playable speed?

Happy holidays everyone and thanks in advance.