Remember my 2.8b has only 533 mhz front side bus while the 3.2c has 800mhz front side bus and hyperthreading. Anyway since socket 478 is going by the wayside I would like to upgrade my cpu to best bang for buck value before they become scarce to find. Although, better said than done, I would like to run this system for a couple of years before going through the upgrade war again. Have never tried overclocking but may give it a try, but reluctant as I don't want to fry my system as I am a novice at overclocking. Already, it's next to impossible to find a socket 478 p4 3.4c in the Toronto area.