Why such a high memory latency?

Question

RAM

I'm not an expert on overclocking RAM, but I know that it is useful for Ryzen.
XMP profile 3000 CL15. Overclocking to 3200 is done calmly, the increase in throughput is noticeable.
But after 3200, the increase is just nil, at a frequency of 3600, the RAM bandwidth is below 50 thousand for reading and copying + a very high latency (see screen). At the same time, I watch reviews and overclocking of other people even with the same RAM, and at lower frequencies they have a bandwidth several times higher, up to 56-60 thousand and a delay of about 62ns.
Maybe I'm doing something wrong? Or the chips are so poor that their max performance is 3000-3200 :\
RAM - Corsair CMK16GX4M2B3000C15 Hyniz AFR A-Die 1 Rank
Mother - ASUS B450M Pro Gaming
Proc - Ryzen 3600

Answer 1

If you want 3600 MHz and more, with low timings and high performance - prepare your wallet) On the same mother as yours, but with a different memory, namely from the crucial ballistix sport LT line at 3000 MHz, I was able to get 3533 MHz. Above 3600 it makes no sense to drive anymore. Set XMP to 3200, try manually lowering the timings to 15-16-16-35. Should be better.
I don't really like the read speed, generally the read and copy speed are pretty close and you have a big gap.
Well, you don’t need to set an end in itself to raise the frequency. You need to strive for the optimal combination of frequency, timings and latency. But if you can do below 70ns on this memory, it will already be good. Rely on read, write and copy speeds.

Answer 2

An example from the Overclockers website, the user's memory was the same, a different mother and percent.
But the differences are significant enough. For me, higher frequencies are taken easier, but there is no increase, he dances with a tambourine, but there is an increase ... (