I used 16gb crucial 2133 ddr4 with a 5820k. Strange thing is, the first time i powered it on, it actually booted into windows, then froze a couple minutes in while installing drivers. Then, the 2nd time it booted up, I got it into the BIOS and switched it to HD mode. After that, it just froze/didnt respond to input while in the bios. After rebooting again after the freeze, i couldn't get back into the BIOS or windows. Before it froze, it showed my CPU temp at 26C, so don't have any overheating issues or anything.
When i bought this board on launch day, it was 299. At this price point, it should at least have debugging tools, as I'm sure other manufacturers do. Also, theres no clear CMOS button or anything. Although, the LED lights on it are a unique touch.
Ryzen 1700 @ 3.7ghz/1.2v daily | AsRock Taichi X370 | 16GB EVGA DDR4-3200 | Sapphire Vega 64 | SoundBlaster ZxR
Swiftech Apogee XL | MCP655-B | QP240 rad