Hello, may I have someone encountered this problem?

GPU has RX570, a total of 9
My computing power has 3.13 CPD

In theory, the final test difficulty is 11.30, and there will be 16 XPM in one day.

But when I actually tested for an hour, it only increased by 0.42 XPM, which is equivalent to about 10 XPM per day, which is very different from the result of the calculator.

It is the same whether  use version 10.2.2 or 10.3.
Whether the driver version is the latest 19.3.1 or the mining driver is the same
My parameters are set as follows

platform = "amd";
cpuload = "1";
target = "auto";
sieveSize = "420";
weaveDepth = "40960";
width = "auto";
windowSize = "8192";
multiplierLimits = ["24", "31", "35"];


Overclocking parameters are the same as Core 1300 / Memory 1750, or Core 1150 / Memory 2000

The average daily is lower than the computer 10~14 XPM
But it started to decrease after February 24~ there are 24 XPM in one day.

I have been digging for half a year, but never less than the calculator is so big