eilif :
How would the AMD Athlon XP 2800+ 2,08 GHZ ( Dual core) and a radeon 9200 128mb and 512mb of RAM perform in Crysis or generally other games like Call of Duty? Would it be better if i upgraded to a HD 4350 and 1.5 GB of RAM And maybe overclocked the CPU to lets say 2.5 GHZ? Thanks for reading
Your CPU can only push your GPU so much, in case where if your GPU was recent and your CPU was ancient, then it would have an effect called "bottlenecking" And as far as I know Athlon XP 2800+ are design to best run on windows XP, so if you are running Windows 7 you need to have that upgraded as well as your RAM. You should look into slowly but surely think about upgrading your system. (Depending on what Motherboard you have, and what components are compatible)
Look into HD 5700 for your GP
Maybe AMD Phenom X4 (you can go with intel but price to profomace ratio is best with AMD I believe)
and 2 x 2 GB of ram
Again you would have to see ur mobo n whats compatible with it
Hope it helps