I upgraded my Bios on Acer Nitro 50-600 (i5-8400) desktop with the current file named "MCU to support CFL-R CPU". Acer download area doesn't explain what it does so I googled "CFL-R CPU" and found a list of Coffee Lake CPU. What I understand is that the motherboard should be able to now support i5-9600 or 9600K . Does anyone know if this is what the bios update does based on this PC or any other PC with similar bios update?