Prior to upgrade used Adata sp610 256 gb SATA ssd. Crystal Diskmark v 6.0.2 x64 gave these results: Read column: 557, 203.5, 134.5, 27.08, Write column: 305.7, 237.7, 107.6, 66.79. Installed Adata sx8200 nvme ssd and got the following results: Read column: 825.7, 149.5, 46.67, 37.21 Write column: 816.8, 178.1, 45.98, 43.89 My understanding is that the first row of each column measures sequential results and the others are random results. And that random results are the ones which affect everyday computer responsiveness. Gigabyte z97x-sli motherboard is updated to the latest bios. Do I need to change some bios setting to get the nvme ssd to perform at its max speed? Oh, and I learned running a z97 board with an nvme ssd is not that smart. Limited to only 10 Gb/s (gigabit, NOT gigabyte, did not understand the critical importance of upper vs lower case for byte vs bit). My understanding is that newer motherboards can reach 32 Gb/s and fully utilize the nvme speed. According to the Gigabyte website the m.2 will give 10 Gb/s vs 6 Gb/s for SATA. So it seems the nvme ssd should be giving a 67% performance increase over SATA (10/6 = 1.67).