Review on 🐍 Patriot Viper Elite Series DDR4 32GB (2x16GB) 2666MHz PC4-21300 Dual Channel Memory Kit (Black/Grey) by Chris Meers

That's why they added the name as 2666MHz meme, even though the part number is actually 2666. But for the price, it's not worth the DD4 meme. If you have Ryzen or any AMD motherboard, you can overclock the 2133 bus with Intel XMP. However, this is not the same for AMD. The official maximum is 2666MHz at which the Ryzen memory controller is guaranteed. Above this frequency, overclocking territory applies. for AMD motherboards. So these chips are clearly NOT 2666MHz. I also sent them back which I paid for and only received 1 credit as Amazon cannot clearly see the returned items.