Please help im upgrading my computer i n ...

So guys the questions are that.I am wanting to upgrade my comp but im not sure if the things i want are compatible with my motherboard. First thing is that i want to get a new graphics card mabye the 8800GTX and i also i would like to get the core 2 duo extreme but main thing is that i'm not sure if that proccecer is compatible with my motherboard how can i find out.Please help me i will be very gratfull. here are some of my system specs if you wish to see my DXDIAG just ask.Intel pentium 4 CPU 3.06GHz 1023Mb of RAM32-bit Operating systemwindows vista home premiumDx10I think this is the mother board Main Circuit Board bBoard: NEC COMPUTERS INTERNATIONAL GA-8I915PM
Bus Clock: 133 megahertz
BIOS: Award Software International, Inc. 20q 08/30/2005not sure lol thanks please help me ^^ :( :DPlease help im upgrading my computer i n ...
According to NEC, you have a lg775 socket, so you can upgrade your C.P.U. to any lg775 C.P.U. I can't find your rig on their site, so I don't know if your power supply will handle that video card. You will want more R.A.M. as 2 gig should be standard with Vista or if you love to play the newest games.