Take out 2 screws holding the left side panel on your pc case.
The card is held by 1 screw attached to the rear of the case.
There is a little bracket at the other end of the card on the motherboard that you must open.
Check on you tube for videos how to do it.
GA-MA-790FXT-UD5P/ AMD Phenom II X4 965@ 3.7ghz/AC cooling/Sapphire R9 270X /RipjawsX 2x4gb DDR3 133/Corsair TX750M/ Antec 900 case/ Windows 7x64 Pro
Gigabyte GA-P67A-UD7-B3 F7 bios /i7- 2600k@ 4.5ghz/Corsair H110 /8 gig G-Skill Ripjaws X
Sapphire TRI-X R9290 /Corsair AX 760i PSU /Logitech Z-5500 Sound /Win 7 x64 (SP1), Corsair 780T case.