Hi so I bought this gaming computer off craigslist last year and havent had much trouble. It could probably use a RAM upgrade because I only have 4 GB and some high-end games drop frames. So it has 2 Geforce GTX 480's. But Im not entirely sure they're both being used. While running MSI Afterburner the GPU usage is at 0%. Is there a reason for this? Do I have to do something? Is there a way to optimize that both are being used to their power? Also what do I look for when it comes to upgrading RAM. I have the CPU-Z ID program, will it tell me all the specifications in this program or is there another one that I need?