I want to get a new GPU my Radeon 6950 Ice Q X Turbo is kinda kicking the dust and not holding up super well to the newest games like Wolfenstein: The New Order. I need something new, and im not sure what to get. Here is my current build, I think the CPU is still pretty good? Please tell me if i'm wrong about that though. Ideally, i would like to only upgrade the GPU. Open to other suggestions though. The most important thing i guess would be will my PSU be able to power it. AMD or Nvidia, does not really matter I would just like a reason why i should buy it over the other. I was looking at the GTX 780 (how big is the performance gap between it and the 770?), I'm not sure if that would work with my setup though.