well ill admit that my knowledge of computer technology may be a little bit lacking, but right now my current motherboard has 1 pci-e x16 slot, i think like 4 pci slots, no isa slots, my current ddr2 memory is pc6400, 3 ide channels & 4 sata channels, both the case & the mobo is mATX, but have considered upgradin 2 full tower for better airflow or switch 2 a diff mATX case (my case doesnt provide the best amount of airflow since the hard drive area is twisted to have the hard drives facing towards me & creates an issue w/ cooling of the hard drive). also the difference between the 650i & 750i is not that much unless you can give me proof. also i plan to switch all of my current config to the newer mobo & cpu. just so ya no laugh, i know that overclocking isnt a matter of flippin the switch, i know that its a very delicate process & thats why ive been holding it off all this time til i could get nuff $$ to get a better mobo & cpu. also im gonna have my friend who is a business technology major @ uta that will help me with that stuff since he knows more bout the stuff than i do.