Now I am getting much better performance from the system. Most of the games are showing significant increase in the fps.
For eg.
CS:Source - 154 fps in benchmark. Earlier it was 38 only.
Resident Evil 5 - 55 fps. Earlier it was around 32.
Assassin's Creed - Brotherhood : 42 fps.
X-Men Origis - Wolverine : 60 fps (locked). Earlier it was around 45.
Portal 2 : 118 fps average. Earlier it was around 50.
Battlefield Bad Company 2: Around 30-35
Batman - Arkham Asylum : 52 fps. Earlier it was around 35-40.
Mirror's Edge : 55+
Modern Warfare 2: 78 fps Avg
Brink : 35 fps.
And so on...
Now, Crysis, Crysis 2, Far Cry 2, and FEAR 3 haven't gained much to write about. And WEI shows an error if I try to update the scores. And CS:Source crashes sometimes. Apart from these, nothing to worry so far. I will keep updating as I discover more improvements or problems.