For the memory to run at DDR4-3200 MHz, HP has to add an Extreme Memory Profile (XMP) to the BIOS/UEFI.
The default or basic speed for DDR4 memory is 2133 MHz. If there is not an XMP in the BIOS/UEFI that recognizes your Corsair memory it will default to the basic speed. This is why you can't get it to run at 3200 MHz.
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