I have an old desktop system. I have seen lots of gaming console, but what fancies me the not is to make a gaming computer system. Let me tell about my system's configuration. I have an old Intel Celeron, 80 GB PATA Hard disk and 256 MB of RAM , I cannot play any other game except the games that are implicitly the part of my windows xp operating system. I have got bored of playing that Solitaire card game and now want to be a game freak , but I do not want to play games on joystick , I rather prefer keyboard to play games , can you guide my what sould I possibly do to turn my pc into an hardcore gaming pc that can support modern warfare and sports related games with high definition graphics and display. I am ready to sell this desktop and but a new system . But please tell me about the price as well , in how much I can sell my desktop and get the new one. Please give maximum replies as you can as I cannot wait any more to get myself involved in such interesting games.