I bought this laptop from online site and I get it with discount last month and its performance is good.As its price are different due to processor and due to its processor speed.As I bought I7 so laptop memory size is 8GB.Its operating system is Window 10.Its processor manufacturer is intel and its processor speed is 2.7 GHz which is awesome for gaming and programing.Its display size is 15.6 inches and it is light in weight ( max 2kg) .Its internal memory is 1 TB.Company also give one year manufacture warranty and it can be extended upto three year by paying 1000 rupees.Customer care always help when I came in trouble regarding laptop.