Thanks dude ;D n few more question  
will heat be a problem if i go for SLI ? what are the cons of doing SLI with this laptop ?
& how does this laptop perform compared to MSI GE60 2OC ? ( without considering SLI option ) . both have almost same config but Lenovo has slower HDD ( Lenovo 5400 rpm vs MSI 7200 rpm  ) . is that really a bottleneck ? 
sorry for TONS of questions 😀