My pc currently has 6 GB of ram in it, it's GHZ is 3.2 with a intel core of an 13 processor 550. Would I need to upgrade my pc for it to keep up with such a good graphics card? Here is what it is.Zotac GeForce GTX 650 1 GB GDDR5 PCI Express 3.0 DVI HDMI VGA Low Profile Graphics Card ZT-61008-10M