ASUS PRIME Z490-P
i5 10600K
CMW16GX4M2A2666C16 (from the same box)
The motherboard is compatible with up to 4600mhz ram and i5 compatible up to 2666mhz ram. I can only use 2133mhz on my XMP profile in BIOS and it's only showing 1066mhz when I check CPU-Z.