Configuring Vivado DDR MIG on Nexys Video

GitHub - viktor-nikolov/MicroBlaze-DDR3-tutorial: Tutorial of a HW design of MicroBlaze using DDR3 RAM on Arty A7 board; DDR3 RAM speed test applicationGitHub

Solution: use external clock (diff or single-ended)

https://support.xilinx.com/s/question/0D52E00006iHtZiSAK/configuration-of-ddr3-on-nexys-video-vivado-and-sdk-with-microblaze?language=en_US