Tested at 3200MHz CL16 on my B450 testbench with a 3600 CPU and MemTest86 for four hours and had no errors. In addition, the kit booting into Ubuntu several times at 3200MHz. This matched serial number kit is rated for 2400 CL15-15-15-15-35 1.20V, but it is ready for overclocking (tested on my setup, but your milage will vary). Has original packaging and looks in great shape.