MSI G52-MA00628 - Manual (Page 70)

Chapter 3
3-28
CPU Frequency
Use this item to select the appropriate clock frequency of the CPU host bus.
Options are: 100MHz, 133MHz, Default.
DRAM Frequency
Use this item to select the appropriate frequency for your DDR SDRAM
modules. Options are: 200MHz, 266MHz, 333MHz and By SPD.