You're not reading it right. 667 x 2 = 1334 = 1333 speed. And its not always x 2. You could have a 333 with a FSB x4 which is 1332 = 1333 memory. Look at CPU-z again and this time when you look at the speed also look at the FSB. Take that number and multiply it by the speed it is showing.

Yeah. You can also go into your BIOS and go to the overclock section. At the top you will see the speed at which the CPU and memory is running at. It will show it's 1333.

So all 3 Memmory slots should read 667 ?

ok cool just noticed after runing a benchmark and seen all 3 sticks @667 so i instaled CPUz and it showed 667 to never noticed before but thought it should be 1333. Ok cool as long as it supposed to read 667.

Thanks a bunch

Per Morblore's post: .

"Look at CPU-z again and this time when you look at the speed also look at the FSB. Take that number and multiply it by the speed it is showing"

Doing that (assuming I read that correctly would that mean in my case my 1600 MHz DDR3 memory runs at 1,700.24 MHz? (802 x 2.12)? - nothing is O/C!

When you see FSB:DRAM 2:12..That 12 is the memory multiplier (DRAM) being used. If you wanted to figure out the memory speed using that you would multiply it by the BCLK.

For a non overclock it would be 12 x 133 = 1596 AKA 1600

Thanks morblore for the clarification.  Googled BCLK and confirmed that I still have a lot to learn. Thus overclocking the basic  i7 bus speed would increase the memory speed too. Anyway, after my "difficult" experience with my first (factory overclocked) sytem I'm not playing around with overclocking my replacement unit. Like speed but stabability is top priority.  But that doesn't mean I don't want to learn more. And you guys are a great help.