Dont know if anyone can help I know it's a long shot but...

I bought a cheap generic 7" Android tablet, I know it's not going to set the world on fire (unless it's charging) or compete with my iPad mini on performance but as it's on Kit Kat 4.4.2 I wondered if I down graded it to Jelly Bean would it be any fast/better.

As it's generic I wondered if anyone could help me find a rom for it or tell me what it might be branded as and resold?

Spec from Tablet:-

Ebay Ad Spec:-