In CPU-Z under the Memory TAB it shows my memory speed as 665.5Mhz, is this the actual speed or do I need to double it as its DDR? Many Thanks
DDR = Double Data Rate Your real frequency is that shown by CPU-Z, but since it transfers 2 bit per clock, it's more commonly referred to as running at 1333.
Yea, Read/writes to RAM happen on every rise and fall of the clock signal. Hence twice per clock cycle, hence Double Data Rate.