Many thanks for your valuable input, I rather return it and order SK Hynix Gold P31 from USA (it’s not sold in EU).Let's see how it is in 6 months. My P2 was great for the first couple of months. The more use the drive got, the worse its performance became. My P2 is now in a Linux machine with a 4 lane PCIe 4 capability. The used partitions are down to sequential read speeds below 1GB/s. The 3 GB/s partitions are blank (as in they've been trimmed and not written to).
Code:root@bkd:/home/brad# for i in /dev/nvme1n1p? ; do echo $i ; dd if=$i bs=1M of=/dev/null ; done /dev/nvme1n1p1 2448+1 records in 2448+1 records out 2567438336 bytes (2.6 GB, 2.4 GiB) copied, 0.848108 s, 3.0 GB/s /dev/nvme1n1p3 61440+0 records in 61440+0 records out 64424509440 bytes (64 GB, 60 GiB) copied, 76.0358 s, 847 MB/s /dev/nvme1n1p4 716800+0 records in 716800+0 records out 751619276800 bytes (752 GB, 700 GiB) copied, 955.296 s, 787 MB/s /dev/nvme1n1p5 173180+1 records in 173180+1 records out 181593120256 bytes (182 GB, 169 GiB) copied, 59.4502 s, 3.1 GB/s
That's starting to approach SATA3 transfer rates. The write performance is considerably worse.
Interesting that P2CR048 isn't available as an upgrade, so I can only assume they've changed the hardware again.