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Question Laptop GPUs

Feb 14, 2019
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I recently got a Dell inspiron 17 7535 from a friend. It has an i7 4500u with 8gb ram and intel 4400 graphics. I want to upgrade this, but im not sure if its possible to buy and install a laptop GPU. If not, what is your suggestion for an adapter so I can use an external GPU?
 
The integrated graphics get about 15-20 fps on every game, minimum settings. On 1030 OC benchmarkss, 1080p gaming with low-medium settings can get around 60 fps on many games. Am I doing something wrong with the integrated graphics? Or were those benchmarks inaccurate?