Other than you were unlucky in receiving a faulty replacement.
Overclock.net has a dedicated thread on the x3d models, maybe they can help sort out your core cycler issue.
Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T..