I'm posting back on this thread about 1 week after system re-build. I decided on the ASUS Prime X370-Pro Mother Board, Ryazen 7 1700 CPU, Thermaltake Water 3.0 Ultimate 360mm AIO Liquid Cooling System CPU Cooler and and Vengeance DDR4 16GB 3000MHz. The UEFI in the ASUS is different than the one in my old ASRock which I had no trouble with but the new board's UEFI crashes on me if I'm in UEFI for more that a minute and this is with the system set at defaults. The mouse starts jerking real bad then crashes causing me to have to power down the system. Has anyone else seen this? I have it overclocked to 3.825 GHz via software ( Because I can't through UEFI ) I'm sure I can go faster. buy running short 20 sec. stress test then I would increase it by .025GHz test and increase then stress and so on until it reached 62c I say this because it is exactly how the software does it but, using the software it gets to 62c then shuts the system down. However 20 min on prime95 got it to 55c however with a couple of hours playing games and other computing it never reaches 40c. I think it can easily get to 4.0 GHz.