New core i5 is laggy compared to my old core 2 duo.

Jun 10, 2018
2
0
10
I recently bought a dell latitude core i5 3rd generation laptop, 4GB Ram, with intel HD GPU but I found it to be running some programs like Sony Vegas and call of duty modern warfare 2 with a lot of difficulty while my already owned HP core 2 duo, 4GB RAM, Intel 4 series express chipset, was running this programs very smoothly. What could be lacking in this new laptop.