Hello Guys,
I bought yesterday a new graphic card. My old graphic card is
Palit NE5X75TT1341F GeForce GTX 750Ti StormX Dual.
Now I have a new graphic card:
Asus Radeon R9290 DirectCU II OC 4GB.
As I opened this, I just thought: OMG! What a monster! Maybe it's too big for my PC.
Luckly it wasn't too big for my PC. The (power) cable for the graphic card was too short. I had a longer cable.
After staring my PC, I installed the drivers from the disk. Then I updated all drivers.
I have just tested some games like CoD Ghosts and GTA V. And it's still laggy like my old graphic card.
I know that this graphic card has much more performance than my old one.
AMD has a Catalyst Control Center (CCC). There I can perform my graphic card. But I am not sure how to do this correctly.

So, can maybe someone help me to improve my graphic card performance?

Thank you.