It probably is but I think if the ram is upgraded you will need to modify the original OS or put a custom android OS on it to get the extra RAM to work but if you have root I sped up my old tablet a lot by overclocking the CPU a tiny bit (only a quarter of a gigahertz) and forcing the tablet to use more RAM
When I fix it I can make a tutorial for how to do that (the tablet is only broken because I purposely by aksedent corrupted the system partition to see what would happen)