I'm still using a Dell E6410, with 8GB RAM, Intel 720QM Core i7 (1st gen, quad core), 240GB SSD, 750GB 2nd HDD and NVIDIA NVS 3100 Graphics. It still does a great job, nothing lags or takes any time at all. Manufacturers would like for us to upgrade every 3-4 years, but the reality is there is a lot of life in 'older' laptops, as long as you take care of them - regular updates, clean out the dust, don't install anything you don't really need etc. etc.