You are confused.apokalipse said:
Every motherboard (754/939/940) supports an 800 Mhz HTT (FSB). When 64-bit is active, twice the amount of data is sent per cycle (t).
Therefore 1600 Mhz (800 Mhz HTT/FSB x 2) is used to compare the performance with a CPU limited to 32-bit (with an 800 Mhz FSB).
The same method is used with DDR technology. A module clocked at 200 Mhz with a double data rate (DDR) has twice the performance of a module clocked at 200 Mhz with a single data rate (SDR).
Therefore 400 Mhz (PC3200) is used to compare the performance of the DDR module with the SDR module.
