Because a DDR4 RAM would have speed between 2133-3200 MHz, it indicates that my RAM sticks are DDR4 RAM. In the screenshot example above, you can see that I have 2 sticks of RAM with speed of 2667 MHz. RAM speed lower than 800 MHz would mean that you have an ancient DDR2 RAM, which is no longer supported in most modern motherboard.If the RAM speed is between 1066 MHz up to 1866 MHz, it’s a DDR3 RAM.If the RAM speed is between 2133 MHz up to 3200 MHz, it’s a DDR4 RAM.If the RAM speed is between 4800 MHz up to 8400 MHz, it’s a DDR5 RAM.Since each generation of RAM has its own specific range of speed, the RAM speed can tell you what DDR type the RAM is. Alternatively, you can right-click on your taskbar and select Task Manager to open it.įrom there, you can learn the speed, size and various other information about your RAM. Press CTRL + SHIFT + ESC to open Task Manager.Here’s how to check the RAM speed via Task Manager in Windows 10.