More RAM speed on MSI B350M Gaming Pro

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CoDeKz

Reputable
Jun 28, 2015
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4,510
Hi, I bought today new parts for my PC, an AMD Ryzen 5 1500X CPU, Hyper X Predator Black 8GB 3000MHz DDR4, and I don't really understand what's happenig.

Windows Task Manager is saying that I have 2400MHz RAM speed, CPU-Z says that I havr 1200MHz.

On the other hand, in the BIOS, I activated A-XMP (profile 1, 1500MHz) but I also selected DDR Speed 2933MHz. And Windows Task Manager says that I have 2933MHz and the BIOS says the same thing too. But CPU-Z says another speed.
What XMP has to do, should I disable it?

Now here's my concern... Does the CPU Memory Speed has any thing to do with my RAM speed? Should be the RAM speed be lower than the CPU Memory speed?

And my question is... If the RAM Speed has nothing to do with the CPU Memory Speed, how can I have 2933MHz RAM speed safely without forcing anything.

The BIOS is updated by the way.
 
Solution
P
Hi

XMP - extreme memory profile should be Intel only thing so your AMD CPU wont work with it (if i'm mistaken anyone please correct me as I own only intel PC's).
I think unless AMD got it's own version of it you would need to set speeds manually in bios.
If you use same settings as are on that XMP profile it should work.

So assuming XMP is not working your memory did default to one of its JEDEC profiles which in your case is 2400.
Now to difference between Task manager and CPU-Z.

Task manager list it as 2400 MHz which is also number manufacturer and shop would market it as, if you bought 2400MHz RAM. But actual speed of memory is only half (1200 MHz) which CPU-Z is showing correctly.
Reason for this is that DDR is short for Double...
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P

pm4

Honorable
Apr 28, 2014
421
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11,160
Hi

XMP - extreme memory profile should be Intel only thing so your AMD CPU wont work with it (if i'm mistaken anyone please correct me as I own only intel PC's).
I think unless AMD got it's own version of it you would need to set speeds manually in bios.
If you use same settings as are on that XMP profile it should work.

So assuming XMP is not working your memory did default to one of its JEDEC profiles which in your case is 2400.
Now to difference between Task manager and CPU-Z.

Task manager list it as 2400 MHz which is also number manufacturer and shop would market it as, if you bought 2400MHz RAM. But actual speed of memory is only half (1200 MHz) which CPU-Z is showing correctly.
Reason for this is that DDR is short for Double Data Rate which simplified means that its capable to transfer 2 chunks of information at same time meaning that real frequency 1200 MHz is effectively doubled = 2400 MHz.

EDIT:
CPU-Z under tab SPD shows also JEDEC profiles for your memory and one of those should be 1200MHz (2400) which it defaulted to.
 
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Solution
C

CoDeKz

Reputable
Jun 28, 2015
6
0
4,510
I did some further research, and I figured out that XMP already done that for me, I'm using 2800MHz so I'm ok with this, thanks for explaining me this.
 
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