Probably the wrong place for the discussion. Do a search and you'll find all sorts of people with this issue. I had the problem after I first built the computer

Probably the wrong place for the discussion. Do a search and you'll find all sorts of people with this issue. I had the problem after I first built the computer. Then I was able to boot by lowering the speed of the memory in the BIOS, now I have the problem again after a reboot. I don't know what changed. There's hundreds of threads which cover a lot of ground on this issue. I'm just going to make this a long term project to understand the issue until I finally cave and buy something which has already been built. Edit: Also 3600 with B450 board. Kingston DDR4-2666 Ram (8x4) which is all the computer store here in smallish city in the Philippines had in stock.