Hello! Yesterday I bought Crysis warhead and I installed and run it, first time won't run, upgrade my nvidia drivers and then it run ok. However It runs at some points choppy, I think I'm getting poor FPS, I'm concerned because I want to play Need for speed undercover when it come out on Nov 18 and I don't want it to run like this, actually if it gets just a little worst on crysis it will be unplayable, so I need to improve my FPS. I wish to upgrade many parts (SLI Mobo, a second 8800GT, 2x2GB DDR2 1066) but I'm on a tight budget right now, so my question is, what's the better upgrade to see a notable increase on my FPS? Would I see any better performance if I get a 9800GT? (currently 8800GT) I have Windows XP 32-bit, should I get the XP 64 bit or it's ok to get Vista 64 bit, I ask this because I'm willing to get 4 GB of ram, but I've seen my friend computer run crysis worst on vista (I think due DX10) with an 9800GX2, however he had 2GB of DDR2 800 and old hard drive but it was very slow at high settings, mine run much smoother at high settings AA 2x 1680x1050, but those settings are for Crysis, not Crysis WH, I don't know if WH is more demanding but somehow is running slower, even with AA off, I just don't want to lower my resolution, I rather upgrade either memory or graphic card. Any suggestions? what upgrade should give me a decent boost? 4GB or DDR2 1066mhz? newer card? or rather wait to do the 8800GT SLI. Thanks!