You'll need min 400W for the GTX750 that could mean up the PSU from 300 to 400W.
Don't think you can buy a GTX745, it's a dedicated low power consumption OEM card made for PC manufacturers I think.
OnePlus 6 review
Razer's Core X GPU enclosure hands on review: It's cheaper, bigger, and even works with Macs
MacBook Pro keyboard issues and other problems
E3 2018 : dates, conférences de presse, billets et plus