hello i recently buyed a second hand laptop with integrated graphics that aren't so great and i heard about the possibility of attaching an external gpu to it. But on every tutorial that i consulted is says that this method requires an external psu to power the graphics card. My question is if i use a no power connector gpu like a gtx 1050 or an rx460 will that be fine? I mean ,since it has no connector for power you can't plug in any 6pin or 8 pin connector so will the power from the pcie extendor be enough to power the gpu?