DDR4 real speed vs task manager speed (question)

[CatTNT]

So i read/heard somewhere that all DDR4 RAM is given to the comsumer at 2133 MHz (or the lowest DDR4 spec, idk) for compatibility reasons, and to get the speed you bought the ram for, say 2400MHz, you need to enable XMP.  But if task manager says its already at 2400Mhz, does that mean its already running at the 2400Mhz speed without XMP enabled, or is the task manager telling me the speed that the RAM should be (2400MHZ) but its actually running at 2133 Mhz?

[Godlygamer23]

To verify if the memory is already running at those clocks, run CPU-Z and navigate to the Memory tab. That'll give you a reading of your memory clock speeds. Just make sure you multiply the value by 2 to get the effective frequency.

[Tabs]

9 minutes ago, CatTNT said:

So i read/heard somewhere that all DDR4 RAM is given to the comsumer at 2133 MHz (or the lowest DDR4 spec, idk) for compatibility reasons, and to get the speed you bought the ram for, say 2400MHz, you need to enable XMP.  But if task manager says its already at 2400Mhz, does that mean its already running at the 2400Mhz speed without XMP enabled, or is the task manager telling me the speed that the RAM should be (2400MHZ) but its actually running at 2133 Mhz?

 

As @Godlygamer23 stated, you can confirm by looking at CPU-Z and checking the Memory tab. However, Windows 10 task manager should show the accurate figure. Early versions of Windows 10 show the speed in MHz, which is half the value of the memory speed in MT/s - for example, DDR-2133 would show up as 1066MHz on CPU-Z and old versions of Windows 10.

 

New versions of Windows 10 have updated it to show the MT/s value (since that's what memory is sold as and it was causing confusion with consumers). There's no difference; the term Double Data Rate refers to the fact that memory operating at a given frequency will be accessed on both the rise and fall of the sine wave - hence doubling the effective frequency.

[CatTNT]

Thanks for answers