You are looking at a brand new 1TB Samsung PCIe drive. Blazing fast with speeds approaching 1000mb read/write per second. Check the black magic screen shot to see how fast it is. Guarantee that this drive will work in: Late 2013 Mac Pro Late 2013 Macbook Pro Retina (13 and 15 inch) 2014 Macbook Pro Retina (13 and 15 inch). Early 2015 Macbook Pro Retina. Late 2013 iMac (21 and 27 inch) 2014 iMac (21 and 27 inch) Note: If you are installing in anything other than the Mac Pro you will need to remove the attached heatsink Model number: MZ KPU1T0T/0A1 Link Width: x4 Lane Module Link Speed: 5.0 GT/s Brand: This is a new Apple genuine SSD, made by Samsung this is more reliable than 3rd party SSDs on the market if you can find one. This SSD is compatible with all MacBook Pro with Retina Display and NEW Mac Pro Late 2013/2014 models. It can be use to upgrade the current SSD on your laptop or new desktop. Also can be use in the iMac late 2013 models with the Blade SSD PCIe connector. Please check your systems compatibility before purchasing