What is the main memory frequency

Memory frequency is the same as CPU frequency, is used to represent the speed of memory, it represents the maximum operating frequency that memory can achieve. The memory frequency is measured in MHz (MHz). The higher the memory frequency is to a certain extent, the faster the memory can reach. The frequency of memory determines how often the memory can work correctly. The current market is more mainstream 667MHz and 800MHz of DDR memory.

Brief introduction

As you know, the clock speed of computer system is measured by frequency. The crystal oscillator controls the clock speed and adds voltage to the quartz wafer, which vibrates in the form of a sine wave, which can be recorded by the deformation and size of the wafer. The vibrations of the crystals are expressed in the form of sinusoidal and varying currents, the current of which is the clock signal. And the memory itself does not have a crystal oscillator, so the memory work clock signal by the motherboard chipset of the North Bridge or directly by the motherboard of the clock generator provided, that is, memory can not determine its own working frequency, its actual operating frequency is determined by the motherboard.

Working mode

In general, the operating frequency of memory is the same as the motherboard FSB, through the motherboard of the adjustment of the CPU FSB also adjusted the actual operating frequency of memory. There are two modes of working in memory, one is synchronous working mode, in which the actual operating frequency of memory is consistent with CPU FSB, which is the default memory working mode used by most motherboards. Another is the asynchronous mode of operation, which allows the operating frequency of memory and CPU FSB can exist a certain difference, it can let the memory work in high or lower than the system bus speed of 33MHz, or let the memory and FSB to 3:4, 4:5, etc., fixed proportional frequency. The use of asynchronous working mode technology can avoid the past overclocking caused by the memory bottleneck problem.