|"DOES THIS BOARD SUPPORTS CORE I3 PROCESSOR..?"|
No. It's a socket 775 board so it only supports Core 2 Duo, Core 2 Quad, & some older CPUs. You didn't state which Core 2 Duo you have or which RAM, but you should be able to overclock. Do you have an actual video card or are you still using the weak Intel onboard graphics?