I have an AMD FX 6100 CPU, 4 GB DDR3 RAM (667 MHz) and Gigabyte 78-LMT-USB3 motherboard. I have recently changed my old 450 watt PSU to a more powerful 500 watt PSU. But I want to take a GPU within a reasonable price. Many have recommended me the Nvidia Geforce GTX 750 Ti GPU. But I want to know, do this card would support my CPU and motherboard? I had gone to a big IT Mall, and the representative told me that as my CPU is of AMD, I should have to buy Radeon GPUs and not Nvidia GPUs. Is this true? Please help as I am in a bit of confusion.