IF yuh going to overclock the processor is not the only thing to take into consideration, the mobo is the more important factor there, BIOS features and all. One of the benefits of going with a 3100+ is that u can change it for a A64 later if yuh feel like it since its 754 pin, but then u could do that with a Celeron D so its really like Baego said depends on what buff u are.