I currently have a AMD A8-5500 APU with Radeon(tm) HD Graphics and 12 GB of RAM in my ASUS that is about 4 years old. I was wondering if i bought a Asus NVIDIA GeForce GTX 970 4GB 256-Bit GDDR5 Graphics Card if it would be compatible? Also if i would need to buy anything along with this new GPU(like a new power supply?) for my PC to be able to run newish games. Trying to stay below $500.