Help with picking a graphics card

Ok first off, I'm a complete noob when it comes to picking the right graphics card, so I need your help. I'm thinking of getting a Radeon R9 280X or something similar for gaming in general, but is it a good idea to put a card like this to a system like mine:

Intel Core i7 860 @2.80 GHz

Kingston HyperX RAM @1333 Mhz

Gigabyte GA-P55-US3L Rev 2.1 Motherboard

My question is:

Will this kind of old CPU bottleneck a graphics card like that or do I need a completely new system?

 

 

you might want to read this : http://www.tomshardware.com/reviews/radeon-r9-280x-third-party-round-up,3655.html