The SSD Review published a review on the Plextor M6e PCIe M.2 SSD
A quote from the article:
Some time ago, we conducted a review of a new PCIe Card called the IOSwitch Raijin and it was constructed of a M.2 to PCIe x4 adapter, along with the Plextor M6e native PCIe M.2 (NGFF) 256GB SSD. At the time, the M6e was an unreleased SSD and it seemed that even Plextor was caught off guard at the publicity that report received, politely asking us to lay low with our M6e samples for a while. A few days back, we received the 512GB version of the M6e PCIe M.2 SSD from Plextor and within the packaging, we found something unexpected.Plextor M6e PCIe M.2 SSD Review @ The SSD Review