Thank you for your reply.
So, plug and play it should work at 2667 at least on all 4?
The XMP I dont care for.
The price was right, but I can't return it once it's open.
Will it work? Ryzen 9 3900x, Asus X570Pro , with F4-3200C16Q-128GVK ram kit. Not on QVL. Ram kit is XMP 2.0 Ready. CL16 (timing 16-18-18-38) (Voltage 1.35 V) try it or sell the ram brand new in box?