I have p4 - 2.5 GHZ processor what kind motherboard should I buy?. What is the different with socket 775 and socket 478. This processor 2 year old can put it on 775 socket motherboard?. Please give detail info. Thanks.

It ain't rocket science. If you have a socket 478 CPU, you MUST get a socket 478 motherboard. If you have a socket 775 CPU, you MUST get a socket 775 board. If you don't know what you have & CPU is "loose" (not installed in a board), a 478 CPU will have actual pins on the underside...a 775 CPU has no pins. Once you determine which type CPU you have, decide how much you're willing to spend for a board. Post back with that info & someone should be able to recommend a board. "If my answers frighten you then you should cease asking scary questions" - Jules Winnfield (Samuel L. Jackson) in Pulp Fiction

How can I determine pins of the cpu?.

On the top of the CPU is written a alpha-numeric code, something like SL53Y. http://en.wikipedia.org/wiki/Pentium_4

"How can I determine pins of the cpu? S478 CPUs have actual pins: http://www.thg.ru/cpu/20020924/imag... Here's the 478 socket: http://upload.wikimedia.org/wikiped... S775 CPUs do not have pins: http://www.cpu-world.com/Sockets/L_... The pins are in the 775 socket: http://upload.wikimedia.org/wikiped... How about clarifying where this CPU is? Is it loose, in a motherboard, in a working system? If it's in a working system, there's software that can identify it for you. Search for CPU-Z "If my answers frighten you then you should cease asking scary questions" - Jules Winnfield (Samuel L. Jackson) in Pulp Fiction

Thanks for all.