I have a 5800x3d running on my gigabyte ax370 gaming k7. Works fine as far as i can tell, just make sure you have the appropriate BIOS prior to updating. I went from an 1800x and upgrading the bios failed one one, but as its dual bios the other one updated fine and you can switch between them at some point to fix the failed one. I had to google it though. I cannot see any of the undervolt optimisations in bios that everybody else talks about setting Curve Optimiser to -30 so its running stock on an air cooler (a decent one i bought for the 1800x).