Question Ram frequency, not matching Dram?

[Daynhg]

Hi.

I wonder if anyone can let me knows why my RAM is showing 6400mhz (XMP enabled)
As it shows on screen shots.
In both memory frequency, and memory.
But under Dram status only 4800?

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Sorry for the blurry images, but is readable.

And if its not running at full speed 6400, what can I do to make it so?

Thank you for any help.

 

[CountMike]

What do Windows and CPU-Z show ?

 

[Misgar]

To be more accurate (or pedantic), your RAM could be running at 6400MT/s, not 6400MHz. The actual clock speed set by the BIOS for XMP DDR5-6400 memory is 3200MHz.

The 6400MT/s figure is calculated by taking the 3200MHz clock speed and multiplying it by 2, which comes from the term "double" in the type of RAM, i.e. Double Data Rate (DDR). N.B. MT/s is short for Mega Transfers per second.
https://en.wikipedia.org/wiki/Transfers_per_second

With DDR RAM, data is transferred on both the rising and the falling edges of the clock cycle, so you get two data transfers per clock cycle. With older SDR RAM, you only get one data transfer per clock cycle.
https://en.wikipedia.org/wiki/Double_data_rate

Many people including RAM manufacturers, BIOS writers, etc., use the terms MT/s and MHz interchangeably, but if you check the true memory clock speed in Aida64 or CPU-Z, HWInfo, etc., you'll see it's half the "advertised" rate.

This document from JEDEC uses MT/s when describing RAM speeds.
https://www.jedec.org/news/pressrel...dram-standard-used-high-performance-computing

I cannot open your first screen dump, but I can see 6400MHz displayed by your BIOS in the second shot.

4800MT/s might be the slowest speed programmed into the SPD chips in your memory and just happens to be the speed I'm running the 2 x 32GB Kingston DIMMs in my 7950X rig. My apps benefit very little from faster RAM and I prefer stability and no BSODs.

As CountMike says, run a utility program to confirm the actual speed of your RAM. Don't worry, I find parts of my BIOS confusing too.

 

[Daynhg]

Sorry guys for a late response, its been a rough couple pf days.

Thank you Misgar
For a very informative reply, it is really appreciated.
I did see MT/s on some of the RAM when I was searching for the ones I wanted, clearance, speed, and CL.
I sort of got the idea, (from what I read) it was the correct way to see the speed rather than MHz,
I think it was Kingstn, and Crucial, that was using it specifically of the RAM I looked at in place of MHz

And Thank you CountMike

For you reply, and the question.

I have posted below, a few screenshots form the new PC, running on Windows 11 .
Which I have found I utterly hate. among othe things, I cant even open Outlook for reasons passing understanding from Firefox.
So will probably format, and go back with 10 on the new PC.

Sorry back to the RAM.

Could you guys please tell me if my RAM is running at 6400, As even looking at Task manager, which seems to say it is.
And CPU-z, which I have no clue is saying.

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And if its not, how do I work it so it is running at 6400. As I say XMP is enabled in the bios.

Any and all help very much appreciated.

 

[CountMike]

Sorry guys for a late response, its been a rough couple pf days.

Thank you Misgar
For a very informative reply, it is really appreciated.
I did see MT/s on some of the RAM when I was searching for the ones I wanted, clearance, speed, and CL.
I sort of got the idea, (from what I read) it was the correct way to see the speed rather than MHz,
I think it was Kingstn, and Crucial, that was using it specifically of the RAM I looked at in place of MHz

And Thank you CountMike

For you reply, and the question.

I have posted below, a few screenshots form the new PC, running on Windows 11 .
Which I have found I utterly hate. among othe things, I cant even open Outlook for reasons passing understanding from Firefox.
So will probably format, and go back with 10 on the new PC.

Sorry back to the RAM.

Could you guys please tell me if my RAM is running at 6400, As even looking at Task manager, which seems to say it is.
And CPU-z, which I have no clue is saying.

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And if its not, how do I work it so it is running at 6400. As I say XMP is enabled in the bios.

Andy and all help very much appreciated.

Yes.it's running at 6400 MHz. In CPU-Z it also shows 3200MHZ because it's DDR (Double Data Rate) you multiply it by 2.

 

[Misgar]

Yes, it's running at 6400MT/s. The second image shows a true clock speed of 3200MHz. Multiply it by 2 for Double Data Rate and that works out at 6400MT/s. The first image shows "6400MHz".

I agree with you about the Windows 11 interface. Most of my PCs are running 10, with a few older systems on 7 and XP. I might have an NT4 computer in the garage gathering dust. My only Windows 11 is a Virtual Machine running in Hyper-V.

 

[Daynhg]

Thank you both.

Finally some good news. So it is running at full speed.
Weird though, as programs and startup dont seem to be any faster, even with the 730 M.2, faster CPU, and RAM..
Oh well, Im not going to worry about that.

I am really pleased, and very much appreciate both of your help, an reassurance.

I even had this "GPT Header Corruption has been detected, please check SATA mode setting in BIOS Setup"
Come up earlier, I went into Bios, and by clicking on something in "boot" seems it is repaired.

​

But back to RAM. Thanks guys. REALLY appreciated.

CountMike ​

Thanks for recommending CPU-z, that really helped.​

And Misgar
I am so pleased its not just me who has "problems" with 11.
Looking more and more like I better stop all this software, install, and swapping, and just go back with 10.

 

[Misgar]

Many programs do not benefit much from faster RAM.

 

[Misgar]

To make my programs run a lot faster I'd like a 5995 Threadripper CPU and a GTX A6000 GPU, but that's probably in excess of 12000 dollars.