I want to upgrade a notebook

Sep 25, 2018
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I have an Alienware 18, had it for almost 6 years now. It has been an awesome computer but slowly getting slower, now wanting to upgrade Dell has provide me no information on how and even if it’s posible, so I’m hoping someone to read this thread and help me out.

GPU: NVIDIA GeForce GTX 780M SLI (2GB each)
CPU: Intel Core i7-4930MX (up to 3.1 GHz)
Ram: 32 GB
OS: Windows 7 64 bits

I will appreciate all help I can get