Post your config, command line, software, hardware, and nonces/min.
Be sure to use a relatively large plot, maybe something over 150000 nonces to rule out special cases.
I’ve got an old video card that I used to mine Lite and Doge back in the day.
Hardware: Radeon R9 290
devices.txt: 0 0 4096 256 4096
Software: Gpuplotgenerator v4.1.1
CL: gpuplotgenerator.exe generate direct h:\plots\123123123123123123_0_150000_256
speed: 18482.46 nonces/min
I’m about to drop in a second 290 card to see if I can double my speed. I’ll post my results.