I have not ran any speed measurement on the memory, but the S.O. recognized all the memory and the system is running smoothly. There are improvements to be done on the sales process - the site does not mention the delivery date or the difference between the delivery methods before the sale has gone through.
Replacing a generic DDR5 16 GB set at 4800. Dollar for dollar, the best sticks I found. Not dramatic, as it should be, w/ solid performance. Instant, measurable performance boost. Highly recommended.