I have an HP Pavillion that came with 6GB RAM DDR3 utilizing 3 of 4 slots. Many people suggested that my system would run faster if I install more RAM. So I did. I removed (1) 2GB DDR3, and in the 2 slots open (blue, side-by-side), I install (2) 4GB modules. Now I have 12GB total. So, where and how exactly would I noticeably experience this dramatic improvement in speed???? Anyone, I very much appreciate your help and knowledge.