Yeah you would need a new mobo and new RAM most likely. I would sit on your system other than say Hard Drive upgrades for another year at least. Nothing really groundbreaking is coming out in the processor markets for at least another year or 2. Yeah dual core is coming, but that is being integrated using current platforms and for the most part will show zero immediate gains over your set up. Over time Dual Core might show some promise, but right now there will be little to gain. Stick with what you have. Maybe a video card upgrade is necessary in the interim, but anything much faster than an X800 won't help as you will be CPU limited. Just hang tight.