i am new

I need a 2000 pc and am looking into the furure so gpu price will be the release price and I am going for a white-black theme with rgb cpu wanted: i7 or ryzen 7 or higher Gpu: 2070 super of higher (no amd cards plz :)) ram 32 go sticks with rgb storage: at least 500 gb nvme or ssd and plz use...

So, I use 2x molex to 6 pin to supply my GPU with power. I plan on buying GTX 650 2gb. How do I know if my 2x molex to 6 pin is properly working? or, how do I know if the GTX 650 2gb will be getting enough power? My board is H61N . My CPU is i3-2100. My OS is Windows 7 ultimate.