I already own the 4690k, and it won't boot so I need to buy a CPU to update the BIOS. On the Gigabyte website it says the mobo supports the 4690k with the F9 BIOS so I bought it, but it won't post with the 4690k and as it's a Z87 my guess is that it needs a BIOS update. I already have tried the 4690k with it and it will turn on for 1 second then turn off again with it installed.