I'm trying to upgrade my pc since my computer can't handle BF4 really well even at low settings. I changed my ram from 4gb to 8gb. The question now is it possible to install a new graphics card for example, "GIGABYTE GV-N660OC-2GD GeForce GTX 660 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card" to a my motherboard that has a PCIEX 2.0 standard??