![]() Use the table below for a list of the PC ratings and DDR data rates of commonly available memory modules.Ĭheck the Online System User’s Guide or Owner’s Manual on Dell Support for the Dell system in question to determine what memory functions with your system. Memory does not actually have a speed, but this number is the maximum tested rate at which the memory transfers data. Here, under Overview, you will be able to see the specification of your macOS and its hardware information. Click on the Apple logo at the top left corner of the screen. This is an approximation of the data rate and would commonly be labeled as 466MHz memory.įor simplification, some of the numbers get rounded up or down and may not exactly match a data rate listed. Here’s how you can check the RAM and its speed on macOS: Main Method. To find the data rate of the memory module, divide this number by 8, and you get an approximation of the data rate of the memory module, or the "speed." For example, to find the data rate of PC3700 memory use the following equation: 3700 / 8 = 462.5. ![]() On this label is a number PC xxxx, where xxxx gives the maximum supported bandwidth of the memory module. To determine the maximum tested speed of a DDR SDRAM memory module, every DDR module has a label. ![]()
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