I bought a prebuilt gaming pc from best buy (Canada) that i'm looking to upgrade in the GPU (and maybe ram) department. It is an asus rog strix gaming pc: Intel core i5-8400, Gtx 1050, 8gb ddr4 ram, I believe the mother board is a ASUS ROG Strix Z370-Eo or a G not completely sure, the power supply i do not know the brand of but the bestbuy website claims for it to be a 300w. I'm looking to upgrade to a 1070, 1070 ti or a 1080 or even an amd if it has high reviews. If anyone can guide me to the right path please do so . And if the power supply needs an upgrade as well to support a higher gpu please let me know about it as well.