Originally Posted by aznm0nkie
I have a new power supply 550 watt but yeah the case is the original one and it is pretty small
OK, great! You're good to go on the PSU.
I'm not familiar with the physical characteristics of the 5700 series cards.
All you need to do is measure the length of your current card, and see how much additional room you do, or do not have, and look for one that will physically fit in that case.
I would go with Nvidia if I were you, their drivers are less problematic.
HAF 932 Advanced / Corsair AX1200 / Asus Rampage IV Extreme / i7-3930K / H100 Cooling 4x120mm
16GB Corsair DDR3 / GTX 580x2 SLI + GTX 460 PhysX / SSDs Mushkin 240GB, Crucial 256GB, Crucial 512GB