Do ineed to consider anything before installing psu

[Dippedhoney]

I have an intel inspiron 3650 ...pretty bad cant run games a gt 730 2gb and a very long psu with only 240w
To upgrade gpu i need a better psu
Am about to install it do i need to know anything before installing (newbie)

 

[RobCrezz]

Make a note of where everything plugs in.