Need help Upgrading.

Jan 14, 2019
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Hello to Toms Hardware Community. I am looking to upgrade/rebuild my Alienware x51 R2 and have no idea of where to start or what parts to use. I am mainly looking to replace the Motherboard, Processor(i3 to i5), Ram (6gb to 32gb min), Graphics card (Geforce 545 atm) and maybe power supply. My main problems is choosing the right right Motherboard, Processor and graphics card.

I thank you in advance for the help.