i was able to animate the UVs when i Plane Map the asset unfortunately when I export it the animation doesn't stick. Hope to find solution regarding this.
Not really, the 6GB can be slower than the 4GB because the system will be waiting for the other 2GB stick. The system is only as fast as it's slowest component. That 2GB stick will be the bottleneck on RAM performance. If you only want 6GB then get two 1GB sticks, if you can find them.