I recently upgraded my boot drive from an 850 EVO 512GB to a 960 EVO 512GB and while I was expecting performance much higher at least in theory, I get the opposite results!! Is there something wrong in the setup of my 960 EVO? 960 EVO Sequential Read (Q= 32,T= 1) : 3159.278 MB/s Sequential Write (Q= 32,T= 1) : 1775.488 MB/s Random Read 4KiB (Q= 8,T= 8) : 500.861 MB/s [ 122280.5 IOPS] Random Write 4KiB (Q= 8,T= 8) : 466.094 MB/s [ 113792.5 IOPS] Random Read 4KiB (Q= 32,T= 1) : 220.932 MB/s [ 53938.5 IOPS] Random Write 4KiB (Q= 32,T= 1) : 146.030 MB/s [ 35651.9 IOPS] Random Read 4KiB (Q= 1,T= 1) : 37.600 MB/s [ 9179.7 IOPS] Random Write 4KiB (Q= 1,T= 1) : 102.315 MB/s [ 24979.2 IOPS] 850 EVO Sequential Read (Q= 32,T= 1) : 4572.378 MB/s Sequential Write (Q= 32,T= 1) : 4154.935 MB/s Random Read 4KiB (Q= 8,T= 8) : 573.442 MB/s [ 140000.5 IOPS] Random Write 4KiB (Q= 8,T= 8) : 518.410 MB/s [ 126564.9 IOPS] Random Read 4KiB (Q= 32,T= 1) : 284.903 MB/s [ 69556.4 IOPS] Random Write 4KiB (Q= 32,T= 1) : 194.709 MB/s [ 47536.4 IOPS] Random Read 4KiB (Q= 1,T= 1) : 284.585 MB/s [ 69478.8 IOPS] Random Write 4KiB (Q= 1,T= 1) : 199.564 MB/s [ 48721.7 IOPS]

Reran the tests after installing the Samsung driver, same results, 850 EVO is much faster than 960 EVO!!

This shouldn't be the case. I don't suppose you have a different M.2 slot you could test or any way of running different comparative tests? The other consideration could be that you simply have a faulty module there. A pain in the neck, but if you're concerned it's faulty then perhaps consider looking into claiming warranty.