First here's my current specs: AMD Athlon Triple-Core(old and getting kinda slow) 10GB Corsair DDR3 1600mhz ASUS Mobo 2x 460 in SLI Thermaltake 700W PSU Stock cooling 1TB HDD with 160GB HDD for OS NZXT M59 Case So I'm interested in upgrading for better performance in BF4 when it drops, and I have a few questions and need some advice since I've been out of the pc building loop for a a year or two. What is the difference in PCI-e 3.0 and PCI-e 2.0? Any recommendations on a CPU (AMD FM1/FM2 socket), and motherboard(either SLI or crossfire ready)? And now the big question, what is the best GPU for around 150 bucks? And what is the comparison with an Nvidia card? I was looking at some 7850 or 7750 but I don't know the difference with ATI/AMD gpus. I am getting an 120GB SSD, and do prefer Nvidia GPUs but am willing to look at ATI/AMD. Thanks!