Impossible. Not happening. Never will.
Shut off the machine (properly), unplug (or use power supply rocker switch) power and graphics cable (dsub/vga, dvi, html, displayport), remove side panel, check to see the green light inside is OUT, remove old graphics card (unscrew from the rear panel), unclip from the motherboard and lift off. Put the new one in until you hear a slight click, screw it back on, connect graphics cable, flip rocker switch on, or plug in power, put side panel on, power on machine.