The multiplier is then used to determine the final clock speed based on the bus speed of the processor. Set this to the appropriate multiple for the final clock speed of the processor. For an example, if you have an Intel Core i5-4670k processor that has a CPU speed of 3.4GHz clock, the proper settings for the BIOS would be a bus speed of 100MHz and a multiplier of 34. Memory Timings. The next aspect of the BIOS that needs adjusting is the memory timings.