Default [Q] no name tablet please help newbie

Hello and sorry for the noob questions but I'm new and I do not know !
I have a no name tablet and I want to change the ROM can I put a custom ROM on it ?
Specs are :
Arm v 7 (vfpv4 neon) quad core
Gp1000+mp core viveante
1 GB ram
Android 4.1.1
Linux version 3.4.0+
All I wanna know is what ROM can I put, if I can put or maybe some other OS if you guys think is better