graphics-card-hd6670

I need a budget and efficient Graphics card for my mother board which will be power efficient and also packs a performance punch and my specs are 1.8350 CPU 2.Gigabyte 970 G1 Gaming Motherboard 3.Corsair Vengeance 8 GB DDR3 RAM 4.PSU Corsair VS 650Watt Standard Wireless Mouse and keyboard...

Everytime I'm doing something on the computer it gets put into the background. So i need to click on the thing i was using to resume what i was doing again. It doesn't get minimized but i can't type or click or move in a game until i click on it again which is very annoying. . Anyone know how i...