In our own Sequential read/write tests we could confirm the official up to 3,500MB/s and 2,900MB/s for read and writes respectively with a read score of 3,534MB/s and 3,034MB/s for writes.
128KB Sequential Read Performance Compared
The KC2500 performs very strongly throughout the tested queue depths, at QD2 it's the fastest 1TB class M.2 consumer drive we've tested to date.
128KB Sequential Write Performance Compared
The Sequential write performance isn't as strong as the read in comparison to the other tested drives. The best performance comes at QD1, after which it slips back down the charts. Indeed at QD2 it's slower than the KC2000 but it recovers to outperform the previous drive at QDs 4 and 32