Hi Subha632,
Frankly, it's not a good idea to invest in a processor, socket 775. If someone gives you one, great.
Whit a i3-2125 (include Intel HD Graphics 3000)
GA-Z68MX-UD2H-B3 (rev. 1.3)
and a cheapest ram 1600
you have a new motherboard.
Gloup_Gloup.