My 2133 MHz memory ram says 1064.1 MHz in BIOS, why?

[RRGT19]

Hi,

I have uploaded a photo of CPU-Z.

 

My memory ram is: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2133MHz (PC4-17000) C13 Memory Kit - Red (CMK16GX4M2A2133C13R)

 

Why CPU-Z says 1061.1?

 

[ZetZet]

 

1064,1*2  =  2128,2

[vanished]

There are so many posts about this

 

because of how DDR* works, sometimes it shows the familiar number (1600, 1866, etc.) and some times it shows half that

[DevilishBooster]

As I said in the other guy's post an hour ago. "If I had a nickel for every post I read with this subject..."

Your RAM is running at the correct speed. DDR = Double Data Rate. Some mobo's/software do not report the full speed for various reasons.

[Prysin]

10 minutes ago, RGT said:

Hi,

I have uploaded a photo of CPU-Z.

 

My memory ram is: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2133MHz (PC4-17000) C13 Memory Kit - Red (CMK16GX4M2A2133C13R)

 

Why CPU-Z says 1061.1?

Because DDR stands for Double Data Rate. Meaning the speed you see in CPU-Z/Bios is HALF the actual speed.

 

1061.1 + 1061.1 = 2120.2 which is within +/- 5% of actual speed. Which is within legal margins of error.

[incarnate]

Because that is the speed it actually runs at. Due to how it works, it can double the data it can transfer.

 

 

[Nena Trinity]

1 hour ago, Prysin said:

Because DDR stands for Double Data Rate. Meaning the speed you see in CPU-Z/Bios is HALF the actual speed.

 

1061.1 + 1061.1 = 2120.2 which is within +/- 5% of actual speed. Which is within legal margins of error.

This is best answer here!