Hello,

I just received my Samsung 990 Pro and the reading and writing speeds are really low from the said speeds and Performance mode is slower than the standard mode.

The bottom one is standard top one is performance mode. Random read and random writes seems okay at first.

I found another post about this issue and that guys recommended using "EaseUS Partition Master" to do "4K Alignment" it did improved to 5850/4850 but the random read and write slowed down hugely also. After that I thought if I switched to performance mode and it got back to what I started.

 Bottom one is standard top one is performance mode.