[M] Crucial P5 1TB PCIe M.2 2280 SSD Review
 

The P5 SSD from Crucial is quite impressive for a mainstream drive in terms of performance and even if it integrates TLC NAND, it can sustain high transfer rates for longer versus the budget oriented P2. After exhausting the 93GB of SLC cache, the transfer rate will drop to about 285MB/s, which is still more than we have seen with mechanical drives of the same size (2.5’’).

http://www.madshrimps.be/articles/article/1001236/