Samsung PM991a - 256GB PCIe NVMe Gen-3.0 x4 TLC NAND Flash HMB-SLC Cache M.2 NGFF 2230 Solid State Drive - MZ-9LQ256C


Warranty3 Year Manufacturer Warranty
AvailabilityYes - Ships in 1 to 2 Days
ManufacturerSamsung Electronics
SeriesSamsung PM991a Client NVMe SSD
UPC CodeDoes Not Apply

Product Specs

Product Specs
Capacity256 GB
Cache Buffer64MB Host-Memory-Buffer (HMB) Pseudo-SLC Caching
Flash TypeSamsung 3D TLC V-NAND Flash Memory (Tri-Level Cell)
ControllerSamsung In House Controller
Form FactorM.2 2230-S2-M (M Key Single Sided)
Interface SpeedPCIe NVMe 1.3b Generation 3.0 x4 16GT/s (up to 4 Lanes)
Interface ConnectorM.2 NGFF (M Key)
Max Sequential Readup to 3,100 MB/sec (Queues = 32, Threads = 1)
Max Sequential Writeup to 1,300 MB/sec (Queues = 32, Threads = 1)
4K Random Readup to 220,000K IOPS (Queues = 32, Threads = 16)
4K Random Writeup to 300,000K IOPS (Queues = 32, Threads = 16)
SSD Endurance300 TBW (Total Bytes Written)
Life Expectancy1.5 Million Hours MTTF (Mean Time To Failures)
Shock Resistance1,500G @0.5 ms half sine, 3 pulses per face
Ecc RecoveryLow-Density Parity Check (LDPC) Error Correction Technology
Rohs CompliantYes
Dimensions(L x W x H) 30.0mm x 22.0mm x 2.23mm
Power ConsumptionActive (AVG) Read 4.7 mW / Write 4.4 W / L1.2 Mode 5.0 mW
Part NumberMZ-9LQ256HBJD
ClassificationEntry Level Drives

Key Features

  • Fast Start-Up, Loading and File Transfers
  • Shock and Vibration Resistant
  • Incredible PCIe NVMe Generation 3.0 Performance
  • Host Memory Buffer (HMB) SLC Caching
  • Samsung in-House Controller
  • Samsung TLC V-NAND Flash Memory
  • Active Garbage Collection
  • Low Power Consumption
  • Bad Block Management Technology
  • Dynamic and Static Wear Leveling Technology
  • Dynamic Write Acceleration Technology
  • Host Control Thermal Management (HCTM) Technology
  • Trim Support Technology
  • Enhanced Defect and Error Management Technology
  • Advanced Hardware LDPC ECC Technology
  • Built for Laptops, Desktops, Workstations and All-in-One PCs

Samsung PM991a Client NVMe SSD

Fitting storage for best performance

The PM991a offers remarkable design flexibility through Ball Grid Array (BGA) packaging. Combining power-efficient compactness and boosted robust performance, the PM991a is a first-rate storage solution for slimmer laptops, providing high performance in a tiny package.

Upgrade to Impressive NVMe Speed

Harness your PC's potential with the PM991a. Whether you need a boost for gaming or a seamless workflow for heavy graphics, the PM991a is a smart choice for outstanding SD performance and it's all backed by an NVMe interface and PCle Generation 3.0 technology.

  • Packed with Speed - Satisfy your need for speed with PCle NVMe Generation 3.0, using HMB technology' and NVMe interface for high efficiency. The PM991a delivers value, without sacrificing sequential read/write speeds up to 3,100/2,000MB/s, over 6.2x the speed of SATA SSDs.
  • Keep Moving with Full Power Mode - Keep your SSD running at its peak with Full Power Mode, which drives continuous and consistent high performance. Enable through Samsung Magician software to keep your SSD in active mode with no latency, so you can instantly jump back into large intensive work files or graphics-heavy games.
  • Built for the Long Run - Keep your files safe with an SSD that's in it for the long haul. With up to 600 TBW and a 5-year limited warranty, the PM91a optimized endurance comes with trusted reliability thanks to Samsung's in-house solutions, from the advanced controller to V-NAND and the latest firmware.
  • Reliable Thermal Control - High-performance SSDs usually require high-performance thermal control. To ensure stable performance, the PM991a uses nickel coating to help manage the controller's heat level and a heat spreader label to deliver effective thermal control of the NAND chip.
  • Smart Thermal Solution - Embedded with Samsung's cutting-edge thermal control algorithm, PM991a manages heat on its own to deliver durable and reliable performance, while minimizing performance fluctuations during extended usage.
  • World's No.1 Flash Memory Brand - Experience the performance and reliability that you can only get from the world's number one brand for flash memory since 2003. All firmware and components, including Samsung's world renowned DRAM and NAND, are produced in house, allowing end-to-end integration for quality you can trust.

   Key Applications

  • Laptops
  • Ultrabooks
  • Industrial PCs
  • Ultra-Mobile PCs
  • 2-in-1 Notebook PCs
  • IoT/Embedded Devices
  • Server and Storage Array Boot Drives
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