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Rectangular green circuit board with silver metal heatsink cover, M.2 2280 form factor

SanDisk

SanDisk Optimus GX PRO 850X 4TB M.2 2280-D5-M PCIe 4.0 x4 internal SSD SDSP81400TAH-000E0

SKU CH-9PVW-G501G MPN SDSP81400TAH-000E0

High-capacity 4TB M.2 2280-D5-M NVMe drive with integrated heatsink, PCIe 4.0 x4 interface, up to 7300 MBps read, 6600 MBps write, and 2400 TBW endurance

  • Total capacity4 TB
  • Sequential read speedUp to 7,300 MB/s
  • Sequential write speedUp to 6,600 MB/s
  • Interface typePCI-Express 4.0 x4
  • Form factorM.2 2280-D5-M
  • Product typeInternal Solid State Drive (SSD)

Capacity 4TB w/ Heatsink

  • Up to 7300 MBps sequential read speeds large files
  • Up to 6600 MBps sequential write speeds fast saves
  • 1,200,000 IOPS random read responsive multitasking
  • 1,100,000 IOPS random write quick app loads
  • 2400TB endurance rating long-term reliability

Capacity and interface

This SanDisk Optimus GX PRO 850X is a 4TB internal SSD built on the M.2 2280-D5-M form factor with a PCI-Express 4.0 x4 interface and NVMe 1.4 protocol. It uses 3D NAND TLC memory to deliver sequential reads up to 7300 MBps and writes up to 6600 MBps. The drive suits content creators and power users who need high-capacity, high-speed storage for demanding workloads.

Motherboard slot and clearance

Verify that your motherboard provides an M.2 slot keyed for M modules and wired for PCI-Express 4.0 x4 to reach the rated speeds. The drive measures 80mm long, 24mm wide and 10.31mm tall including its integrated heatsink, so confirm the slot has enough vertical clearance and that no motherboard heatsink or large component will interfere. A 2280-length standoff is required.

Thermals noise and power

The bundled heatsink keeps the controller within the 0°C to 85°C operating range without any moving parts, so the drive runs silently. Idle power draw is 5 mW, while typical active consumption reaches 8.0W during reads and 7.2W during writes. The 2400TB TBW rating and 1,750,000-hour MTBF indicate sustained reliability under heavy daily use.

How it compares

Measured against everything we stock in Internal NVMe & SATA SSDs, at today’s prices. Recalculated every night.

Price $846.99
Pricier than about 88% of the 1,994 comparable items (median $180.49).
Total capacity 4 TB
Higher than about 90% of the 1,368 comparable items (median 1 TB).
Sequential read speed Up to 7,300 MB/s
Higher than about 87% of the 1,180 comparable items (median 2,400 MB/s).
Price per TB $211.75 per TB
Pricier than about 63% of the 1,362 comparable items (median $165.50 per TB).

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Specifications

Product
Brand nameSanDisk
Product lineOptimus GX PRO 850X
Model nameSDSP81400TAH-000E0
Total capacity4 TB
Product typeInternal Solid State Drive (SSD)
Performance
Sequential read speedUp to 7,300 MB/s
Sequential write speedUp to 6,600 MB/s
Random read (4K)Up to 1,200,000 IOPS
Random write (4K)Up to 1,100,000 IOPS
Storage
NAND flash type3D NAND TLC
Write endurance2400 TB
Connectivity
Connection protocolNVMe 1.4
Ports & slots
Interface typePCI-Express 4.0 x4
Power
Idle power draw5 mW
Active power drawAverage Active Power Read: 8.0 W
Average Active Power Write: 7.2 W
Size & build
Form factorM.2 2280-D5-M
Heat sinkWith HeatSink
Overall height10.31 mm
Overall width24 mm
Product depth80 mm
Product weight30.4g
Shipping weight0.05 kg
Package size127 × 102 × 1 mm
Environment & compliance
Operating temperature range0 °C to 85 °C
Storage temperature range-40 °C to 85 °C
Max shock tolerance1,500G @ 0.5 ms half-sine
Vibration toleranceOperating Vibration: 5 gRMS, 10-2000 Hz, 3 axes
Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes
More details
Mean time between failures1,750,000 h

Other versions of this model

5 more in the same range

Questions about this item

Will the M.2 2280-D5-M form factor with its 10.31mm height fit my motherboard slot?

The drive measures 10.31mm high, 24mm wide and 80mm deep; verify your board’s M.2 slot clearance and standoff position before installing.

Does the included heatsink require extra case clearance or airflow?

The integrated heatsink adds to the 10.31mm total height; ensure at least a few millimetres of space above the slot and some airflow for sustained write loads.

What power supply headroom should I budget for this SSD?

Idle draw is 5 mW; active read peaks at 8.0W and active write at 7.2W, so a standard 12V rail with ample margin covers it easily.

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