Sequential Read (Q= 32,T= 1) : 382.416 MB/s

Sequential Write (Q= 32,T= 1) : 3.198 MB/s

Random Read 4KiB (Q= 8,T= 8) : 163.576 MB/s [ 39935.5 IOPS]

Random Write 4KiB (Q= 8,T= 8) : 9.028 MB/s [ 2204.1 IOPS]

Random Read 4KiB (Q= 32,T= 1) : 168.016 MB/s [ 41019.5 IOPS]

Random Write 4KiB (Q= 32,T= 1) : 132.950 MB/s [ 32458.5 IOPS]

Random Read 4KiB (Q= 1,T= 1) : 1.920 MB/s [ 468.8 IOPS]

Random Write 4KiB (Q= 1,T= 1) : 3.196 MB/s [ 780.3 IOPS]

and this are after I waited for a minute or so

Sequential Read (Q= 32,T= 1) : 452.687 MB/s

Sequential Write (Q= 32,T= 1) : 296.956 MB/s

Random Read 4KiB (Q= 8,T= 8) : 202.904 MB/s [ 49537.1 IOPS]

Random Write 4KiB (Q= 8,T= 8) : 9.582 MB/s [ 2339.4 IOPS]

Random Read 4KiB (Q= 32,T= 1) : 182.563 MB/s [ 44571.0 IOPS]

Random Write 4KiB (Q= 32,T= 1) : 152.417 MB/s [ 37211.2 IOPS]

Random Read 4KiB (Q= 1,T= 1) : 30.207 MB/s [ 7374.8 IOPS]

Random Write 4KiB (Q= 1,T= 1) : 89.152 MB/s [ 21765.6 IOPS]

After that, I restarted the system to check is everything selected correctly in the bios and it is, again repeated the test as soon as the Windows managed to become responsive

Sequential Read (Q= 32,T= 1) : 332.292 MB/s

Sequential Write (Q= 32,T= 1) : 187.877 MB/s

Random Read 4KiB (Q= 8,T= 8) : 133.580 MB/s [ 32612.3 IOPS]

Random Write 4KiB (Q= 8,T= 8) : 4.498 MB/s [ 1098.1 IOPS]

Random Read 4KiB (Q= 32,T= 1) : 82.863 MB/s [ 20230.2 IOPS]

Random Write 4KiB (Q= 32,T= 1) : 33.091 MB/s [ 8078.9 IOPS]

Random Read 4KiB (Q= 1,T= 1) : 0.031 MB/s [ 7.6 IOPS]

Random Write 4KiB (Q= 1,T= 1) : 74.150 MB/s [ 18103.0 IOPS]

and again after a minute or so

Sequential Read (Q= 32,T= 1) : 539.780 MB/s

Sequential Write (Q= 32,T= 1) : 451.266 MB/s

Random Read 4KiB (Q= 8,T= 8) : 207.780 MB/s [ 50727.5 IOPS]

Random Write 4KiB (Q= 8,T= 8) : 40.977 MB/s [ 10004.2 IOPS]

Random Read 4KiB (Q= 32,T= 1) : 189.942 MB/s [ 46372.6 IOPS]

Random Write 4KiB (Q= 32,T= 1) : 158.394 MB/s [ 38670.4 IOPS]

Random Read 4KiB (Q= 1,T= 1) : 30.225 MB/s [ 7379.2 IOPS]

Random Write 4KiB (Q= 1,T= 1) : 71.114 MB/s [ 17361.8 IOPS]

Faulty SSD or Windows update messed up something? Oh and only startup item enabled is Afterburner so nothing external is hanging the system. SSD has 33% free space on that partition, and about 60% free space overall.