You should use AMD Memory Tweak (https://github.com/Eliovp/amdmemorytweak binaries are here compiled by me for those who don't know how to compile the source: https://drive.google.com/open?id=1sgYugFgFq5Ja89DexDvwgvP1dtRO2d7A) and you will 100% sure get 1.0%-1.5% more hashrate than Claymore.

Unzip WinAMDTweak.zip to some folder XXX. Run Claymore with your best settings. After that run a command prompt window with Administrative privileges, navigate to WinAMDTweak.zip unzipped folder XXX using 'cd XXX' command and after that run:

WinAMDTweak.exe --current



You will see the current memory setting of Claymore. Something like this:
https://www.cryptoprofi.info/wp-content/uploads/2019/04/word-image-49.png

Copy/Paste them down in text file.
After that stop Claymore. Run WinAMDTweak.exe --...  with these settings and run Phoenixminer.exe after that with the  same -cclock -mclock -cvddc -mvddc parameters like Claymore.

For Nvidia use PM 5.1 with -straps option.