I have the same problem and it's very frustrating. I have Asus Z390-E Strix, latest bios + Corsair RGB Pro CMW16GX4M2C3200C16 2x8Gb DDR4. I think it used to work perfectly some time ago, before I had to RMA my CMW16GX4M2C3000C15 DDR4 and get CMW16GX4...