1、High-stability 3D NAND particles, 96-layer 3D NAND flash technology, effectively maintain the high speed operation and stability of the PM981a. 2、Dynamic cache low-latency smoother, external dual-channel DRAM cache, greatly improve 4K random read and write performance, reduce SSD access latency. Support NCQ full speed command queue and TRIM instruction. 3、PM981a uses a new enhanced Phonix controller, the highest random read speed of up to 3500MB / s. The highest random write speed of up to 3000MB / s. 4、Support nvme protocol, PM981a powerful configuration. 5、Suitable for high-end motherboards, game books, ultrabooks, NUC and other devices with PCle M.2 interface. The PM981 uses the same Phoenix master as the PM981a. The difference is 981a has the new 96-layer stacked 3D NAND pellets, which is the same as the 970 evo plus. The 981 is the old 64-layer 3D stacked pellet. Compared to the older 981, the 981a has a relatively higher random I/O performance. In fact, the read and write performance of the PM981a is basically the same as that for Samsung 970 EVO plus. That is, the PM981a is another OEM version of the 970 evo plus, and remains High cost performance. Features: 1. High-stability 3D NAND particles, 96-layer 3D NAND flash technology, effectively maintain the high speed operation and stability of the PM981a. 2. Dynamic cache low-latency smoother, external dual-channel DRAM cache, greatly improve 4K random read and write performance, reduce SSD access latency. Support NCQ full speed command queue and TRIM instruction. 3. PM981a uses a new enhanced Phonix controller, the highest random read speed of up to 3500MB / s. The highest random write speed of up to 3000MB / s. 4. Support nvme protocol, PM981a powerful configuration. 5. Suitable for high-end motherboards, game books, ultrabooks, NUC and other devices with PCle M.2 interface. Specifications: Support Agreement: MVME Interface standard: M.2 2280 Channel: PCI-E 3.0 x4 Size: Max. 80.15*22.15*2.38mm/3.16*0.87*0.09inch Weight: about 8g Particle type: 96 layers V-NAND 3-bit TLC TRIM SUPPORT: yes S.M.A.R.T SUPPORT: yes SEQUENTIAL READ: Up to 3,500 MB/s SEQUENTIAL WRITE: 256 GB: Up to 2,300 MB/s 512 GB: Up to 3,200 MB/s 1 TB: Up to 3,300 MB/s RANDOM READ (4KB, QD32): 256 GB: Up to 250,000 IOPS 512 GB: Up to 480,000 IOPS 1 TB: Up to 600,000 IOPS RANDOM WRITE (4KB, QD1): 256 GB: Up to 60,000 IOPS 512 GB: Up to 60,000 IOPS 1 TB: Up to 60,000 IOPS Current: 2.8A TBW: 256GB: 150 512GB: 300 1TB: 600 Package List: 1 * Solid State Drive Note: No retail package, it is for Lenovo computer teardown, with slight read and write. Does not support for MAC OS. To purchase this product, please make sure that the motherboard supports PCI-E NVME 3.0 X4 interface. Some motherboards only support PCI-E 2.0, and the hard disk speed cannot be fully utilized. By default, system for WIN10 requires us to check "close system for Windows10 write cache refresh on the device" in the device manager to obtain a relatively normal read-write speed. The old motherboard/notebook does not support the installation of this solid state, and there is no default driver in the system for WIN7, so when the system for WIN7 and system for PE are installed, the hard disk may not be found.