I have the same issue 20hash. I tried the memory and clock at anyway and still doesn't work better than 23.
I have the latest Nvidia drivers,
Can you confirm is due to the 452.06 version?
Regards
Could help you find a way around if you can identify the memory chip on your graphic card, to do this go and download GPU-Z and install, it will reveal if you have hynix, micron or samsung memory, some settings works best for micron and not samsung memory