quote from the source:
Fast memory matters even more in games. When we overclock by setting the BCLK frequency to 133 MHz, another 1-point increase in the memory frequency multiplier produces more than 10% fps boost. Therefore, if you are planning a Llano platform to become your entry-level gaming rig, then you should definitely make sure to get the fastest DDR3 SDRAM modules. The combined graphics core and memory overclocking allows to improve A8-3850 performance by up to 32%, which is a great result. If you donâ€™t have fast memory, then raising BCLK frequency to its maximum may give you 25% performance boost, which also good enough. The only overclocking approach that doesnâ€™t really do much is the â€œstraight-forwardâ€ one, when you do not lower the processor clock frequency multiplier. In this case increasing the processor clock speed to 3.6 GHz will only give you 11% fps rate increase.