HP EX900 PRO 1TB NVMe SSD review

Memory (DDR4/DDR5) and Storage (SSD/NVMe) 357 Page 2 of 20 Published by


Specifications & Features

Specifications & Features

HP is now offering three versions of the SSD with the bigger models (256/512GB/1TB) have more endurance. The sample that has arrived for testing is the 1TB version of the drive. The series as stated will be fitted with either 96- or 64-layer TLC written (3-bits per cell) 3D NAND flash memory (vertically stacked). This allows HP to offer the proper storage volumes., the EX900 Pro models come with an added DRAM cache chips and a HP branded controller. HP offers a 5-year warranty for the EX900 Pro series and the endurance ratings in TBW (terabytes written) are identical to the predecessor.

  • 160  TBW for 256 GB model
  • 320  TBW for 500 GB model
  • 650 TBW for 1 TB model

So instead of using Planar NAND, 3D NAND is used. 3D TLC NAND is physical vertical NAND cell stacking not to be confused with chip stacking in a multi-chip package. In 3D NAND, NAND layers, not chips, are stacked in a single IC. The good news is continued cost reduction, smaller die sizes and more capacity per NAND chip. Also, installed NAND toolsets in the wafer fabs can, for the most part, be reused, thereby extending the useful life of fab equipment. The NAND ICs are driven by a HP controller, there is a DRAM cache up-to 1024 MB.


The HP SSD EX900 PRO M.2 Series utilizes a cost-effective, high-performance HP PCIe-to NAND controller (HP H8089) to manage a full PCIe Gen 3(8Gb/s) x 4 bandwidth with the host while managing multiple NAND flash memory devices on 8 channels. The controller basically is a renewed Silicon Motion SM2263EN. 

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