I am using the laptop in my sig and I'm just wondering what my upgrade possibilities are, I am very happy with the performance but I am also very nuts about getting the best out of what I have. So what can I upgrade to boost performance? Is there a graphics card that I can upgrade to? Also I've been wondering, why can't I put a 7900gtx in this laptop? It's pci express isn't it? And it's a laptop card? Any input is welcome and appreciated!