Bruce, I've got this for a mobo ... GIGABYTE GA-965P-DS3 (rev. 1.3) LGA 775 Intel P965 Express ATX Intel Motherboard - Retail and this for a CPU Intel® Core™2 Duo Processor E6750 (4M Cache, 2.66 GHz, 1333 MHz FSB) Would I notice much if I upgraded the CPU to ... Intel Core 2 Duo E8400 Wolfdale 3.0GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor Just bored and shopping ... Thanks, rr