I am building a Intel Core2 6300, Asus P5B, OCZ DDR2 800, 7600GS for a friend. I have always ran AMD cpu's and am unfamiliar with some of the settings of the Intel. The specs say 1.87 GHZ with 1066 FSB and 266 core mhz. System core frequency to FSB frequency is 1/7. What I don't understand is how fast the memory will be running at stock speeds. The memory I am getting is rated to 800 @ 4-5-4-15. I am planning on a mild overclock since he is computer illiterate. At stock, I presume the bus is 266 mhz, the cpu is 266 x 7 or 1862 mhz, but what is the memory? And what is the 1066 FSB?