text: if you currently have XP 2800, there are many other CPU's with same price as dual core 805 that can boost your gaming speed.\n\nDon't get confuse about speed and multi-tasking.  \n\nFor $100, you can buy a dual-core 805 or a pentium 4 541 3.2GHZ 800MHZ.\n\nThe matter of choice really rely on what you use the system for.  Dual-core can handle multitasking extremely well.  For instant, it allow you encode a DVD and playing game at the same time.  The pentium 541 in the other hand will significantly speed up single task program, like gamming machine. \n\nSo if multi-tasking is not important, consider a single core.\n\ngood luck