Without XMP you do not benefit from the full speed depending on the device (this RAM stick specifies DDR4-3200), depending on the device this can be throttled to 2133 / 2400 / 2666 / 2933 / 3000, which is especially the case with older laptops and you have a significant loss of performance especially in AMD devices with Ryzen (unused potential), whereby mostly XMP I or II can be set