I have this: EVGA NFORCE 680I SLI MB Motherboard 2 Core Duo Extreme 2.93 GHz X6800 4M Cache 1066MHz Processor 4GB DDR22 Low Latency PC-6400 RAM Seagate 750GB SATA 7200 RPM 8MB Cache HDD NEC 18X DL DVD+-R/W RAM Recoderder CD/DVD Drive NVIDIA HD C55-MB Audio Dual SLI GEFORCE 8800GTX 768MB PCI-E Video I want to know if I can with the current MB upgrade the CPU and if so whats the best I can go to, also can I upgrade/increase the RAM if so what type and how much of it, lastly whats the biggest internal 3.5 HDD that will work with this MB. Oh and one last question where can I get all of this stuff for less than $700USD, if possible? I could go $850 but that would be pushing it. Thanks all. Later.