Auction is for a Samsung 512GB SM951 M.2 SSD Drive. Drive is a pull from a brand new computer and only has what was from the factory in terms of writes. 

World Class Performance in a Tiny Form Factor

The Samsung SM951 M.2 PCIe SSD (NVMe model) is the new performance leader in M.2 form factor SSD's. It provides up to 2150MB/s read and 1550MB/s write sequential data transfer rates, along with astounding random I/O ratings of 300k reads and 100k writes.

Ready for today's systems: 
The Samsung SM951 (NVMe) is compatible as a boot device in a wide variety of systems with a free PCIe 2.0/3.0 M.2 socket. This includes Z97/X99/Z120 based motherboards, modern notebooks, and tiny form factor PC's like the Intel NUC. It can also act as additional super high speed storage in almost any desktop with a spare PCIe slot when combined with a PCIe adapter such as the Lycom DT-120.

Apple Compatibility: 
Note, this SSD is “NOT” compatible in Apple MacBook Air, MacBook Pro or iMac computers. So far testing in the Classic (pre-cylindrical) Mac Pro has been unsuccessful when combined with a standard M.2 to PCIe adapter, which we think will change when a NVMe driver is included with OSX. For now Use the SM951 AHCI version which definitely works in the classic Mac Pro. 

Key Features: 
• Extreme performance - up to 2150/1550 sequential read/write data transfer rates and 300k/100k read/write random IOps 

• Bootable in Windows 7/8/10 and Linux (Not yet OSX) 

• PCIe 3.0 device, backwards compatible with PCIe 2.0 

• Small M.2 form factor plugs straight into your PCIe-based M.2 socket with no additional cables required