Low memory read values

[Fritz_the_Germ]

Yo guys,

I tuned my memory pretty good, but the read values are poor (48000 MB/s). They should reach about 60000 MB/s.

What is wrong?

 

[FatBoyNL]

That's just due to the fact that you're simply looking at the expected results for an older 5900X CPU:

[Fritz_the_Germ]

I don't know if that is the point. Even I set to 9800X3D the values are poor:

 

 

[Fritz_the_Germ]

[FatBoyNL]

Your Cache & Benchmark screenshots posted above show up to 50% differences in Memory bandwidth between them. That's just odd...
Did you try and tweak your memory? And is FCLK=2200 completely stable on that CPU? Or were you running other benchmarks or browsing the web during the benchmark(s)?

EDIT: nvm, I see now you were only comparing systems without any explanation. Sorry, can't help with that.

[Fritz_the_Germ]

Okay, this was just a system compared to mine up above.

So I set the same settings like the dude with his X870E Hero.

The results are impressive: The read memory through-put is improved by ~10.000 MB/s. 

My question particular is, what is responsible for this improvement?

  

 

[FatBoyNL]

This 10k 'improvement' is most likely due to raising FCLK. Even after you deliberately raised your CAS Latency from default 30 to 32, which makes things a lot slower again.

Something still seems very off with your memory bandwidth though. Just look at the ridiculously low memory Writes in your last screenshot... and compare that score to your first post.
Something just doesn't add up. Could be a BIOS setting, but also could be your RAM (hardware related) or a completely unstable CPU overclock.

-Is it a new build, or did you just swap CPUs and maybe forgot to reset the BIOS to defaults?
-When you select the B2-DIMM at the bottom of the ZenTimings screen, are all values presented 100% the same as all values for the A2-DIMM?
-Did you test stability and performance in other programs like Prime95 ,etc. yet?
-Your CPU speed in the screenshot seems very high to me btw - is that by default and did you test it for stability?

I'd like to suggest to start over tweaking your system by resetting your RAM to default settings and re-apply EXPO settings after a reboot or two.

I added my own scores with a 7800X3D using slower DDR5-6000 RAM (for comparison only - these are highly tweaked for my system, so please don't try them for yourself.
IIRC, default Reads - Writes - Copies for my specific RAM used to be about 63k - 91k - 63k (with a latency of 72 or so) at FCLK = 2000. Those default/untweaked Reads-Writes-Copies values should even be a bit higher when using a 9800X3D instead of a 7800X3D (though not by much).


EDIT:
TLDR; did you OC your CPU before this 'memory issue' by the way?

EDIT 2:
Or did you select Game Mode (or whatever it's called) and disabled HT/SMT in BIOS perhaps?

[Fritz_the_Germ]

No, I did not oc my CPU before RAM OC.

I found out, that an enabled GDM reduces the read through put at about 4 K.