What is the capacity of the SanDisk Optimus GX PRO 850X SSD?

The capacity of the SanDisk Optimus GX PRO 850X SSD is 8TB.

What is the maximum sequential read speed of the SanDisk Optimus GX PRO 850X SSD?

The maximum sequential read speed of the SanDisk Optimus GX PRO 850X SSD is up to 7200 MBps.

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SANDISK 8TB Optimus™ GX PRO 850X PCIe® 4.0 x4 M.2 2280 NVMe™ SSD - SDSP81800TAN-000E0

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Capacity: 850X 8TB

850X 1TB
850X 1TB w/ Heatsink
850X 2TB
850X 2TB w/ Heatsink
850X 4TB
850X 4TB w/ Heatsink
850X 8TB
850X 8TB w/ Heatsink

CHAMPION YOUR GAME SESSION AND CREATIVE WORKFLOW. Boasting PCIe® Gen 4.0 Sequential Read/Write speeds up to 7,200/6,600MB/s (2TB and 4TB models), your SSD enhances your game sessions and your creative workflow.
STAY IN THE GAME. Experience seamless game sessions and smooth multitasking with Random Read/Write speeds up to 1.2M/1.2M IOPS (8TB model) and integrated SANDISK® nCache™ 4.0 technology. Supports Microsoft® DirectStorage games.
NO NEED TO DELETE. Stop deleting to make room for more games or applications. With capacities up to 8TB and trusted SANDISK® BiCS TLC 3D NAND, you’ll have room for more.
DESIGNED WITH THE CREATOR IN MIND. With up to 4,800 TBW (8TB model) endurance rating, your drive stays by your side. Help protect your digital assets with TCG Opal v2.01 data-at-rest encryption.
YOU CAN DO MORE WITH SANDISK® SOFTWARE. Download the SANDISK® Dashboard application (Windows® only) to help keep your drive in peak shape. Or turn on Game Mode to transform your gaming experience.
REST EASY. Your hard work is covered with Sandisk’s 5-year limited warranty for peace of mind

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

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Dominate your game session and creative projects

Game and work at elite level with PCIe 4.0 Sequential Read/Write speeds up to 7,300/6,600MB/s⁽¹⁾ (2TB and 4TB models⁽²⁾).

Stay in the game

Random Read/Write speeds up to 1.2M/1.2M IOPS⁽¹⁾ (8TB model⁽²⁾) and integrated SANDISK nCache 4.0 technology.

No need to delete

Room for more with capacities up to 8TB⁽²⁾ powered by trusted SANDISK BiCS TLC 3D NAND on M.2 2280.

Designed with the creator in mind

Up to a 4,800TBW⁽³⁾ (8TB model⁽²⁾) endurance rating and support for TCG Opal v2.01 data-at-rest encryption⁽⁴⁾.

Do more with SANDISK software

The SANDISK Dashboard⁽⁵⁾ (Windows only) keeps your drive up to date and monitors its health.

Notes:

(1) 1MB/s = 1 million bytes per second. IOPS = input/output operations per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors.

(2) 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.

(3) TBW (terabytes written) values calculated using JEDEC client workload (JESD219) and vary by product capacity.

(4) Check system BIOS for support or 3rd party software required to enable.

(5) Available for download; see the Sandisk website for more details.

SANDISK, the SANDISK logo, SANDISK Optimus, and nCache are registered marks or marks of Sandisk Corporation or its affiliates in the U.S. and/or other countries. Acronis and True Image are registered marks of Acronis International GmbH in the United States and other countries. The NVMe word mark is a mark of NVM Express, Inc. PCIe is a registered mark of PCI-SIG. Windows, Microsoft and DirectStorage are registered marks of the Microsoft group of companies. All other marks are the property of their respective owners. Product specifications subject to change without notice. Pictures shown may vary from actual products.

Overview

The SanDisk Optimus™ GX PRO 850X is an 8TB internal solid state drive for gaming, creative workflows, applications, and large digital libraries. Its M.2 2280 form factor and PCIe® 4.0 x4 interface provide high-capacity NVMe storage for compatible systems.

Key Features

8TB capacity for games, applications, and creative files
PCIe® 4.0 x4 interface with NVMe 1.4 protocol
SanDisk BiCS TLC 3D NAND and SanDisk nCache™ 4.0 technology
Up to 1,200,000 IOPS for 4KB random read and write
TCG Opal v2.01 data-at-rest encryption

Performance

The drive delivers up to 7,200 MBps sequential read and 6,600 MBps sequential write speeds. 4KB random read and random write performance reaches up to 1,200,000 IOPS.

Design

The M.2 2280-D5-M drive measures 80mm deep, 22mm wide, and 3.88mm high, with a weight of 8.6g. It is supplied without a heatsink.

Connectivity & Compatibility

The SSD uses a PCI-Express 4.0 x4 interface and NVMe 1.4 protocol in an M.2 2280 form factor. It supports Microsoft® DirectStorage games.

Reliability & Durability

The drive is rated for 4,800TBW and has an MTBF of 1,750,000 hours. Operating temperature is 0°C ~ +85°C, while storage temperature is -40°C ~ +85°C. Maximum shock resistance is 1,500G @ 0.5 ms half-sine. TCG Opal v2.01 data-at-rest encryption helps protect stored data.

Software & Tools

The SanDisk Dashboard application is available for Windows® only to help keep the drive in peak shape. Game Mode is also available.

Specifications

Brand: SanDisk
Series: Optimus GX PRO 850X
Model: SDSP81800TAN-000E0
Device Type: Internal Solid State Drive (SSD)
Capacity: 8TB
Form Factor: M.2 2280-D5-M
Memory Components: 3D NAND TLC
Interface: PCI-Express 4.0 x4
Protocol: NVMe 1.4
Cache: No DRAM (SLC)
Max Sequential Read: Up to 7200 MBps
Max Sequential Write: Up to 6600 MBps
4KB Random Read: Up to 1,200,000 IOPS
4KB Random Write: Up to 1,200,000 IOPS
Terabytes Written (TBW): 4800TB
MTBF: 1,750,000 hours
HeatSink: without HeatSink
Power Consumption (Idle): 5 mW
Power Consumption (Active): Average Active Power Read: 6.7W; Average Active Power Write: 8.0W
Operating Temperature: 0°C ~ +85°C
Storage Temperature: -40°C ~ +85°C
Max Shock Resistance: 1,500G @ 0.5 ms half-sine
Height: 3.88mm
Width: 22mm
Depth: 80mm
Weight: 8.6g

Model
Brand	SanDisk
Series	Optimus GX PRO 850X
Model	SDSP81800TAN-000E0
Device Type	Internal Solid State Drive (SSD)

Details
Form Factor	M.2 2280-D5-M
Capacity	8TB
Memory Components	3D NAND TLC
Interface	PCI-Express 4.0 x4
Protocol	NVMe 1.4
Cache	No DRAM (SLC)

Performance
Max Sequential Read	Up to 7200 MBps
Max Sequential Write	Up to 6600 MBps
4KB Random Read	Up to 1,200,000 IOPS
4KB Random Write	Up to 1,200,000 IOPS
Terabytes Written (TBW)	4800TB
MTBF	1,750,000 hours
HeatSink	without HeatSink

Environmental
Power Consumption (Idle)	5 mW
Power Consumption (Active)	Average Active Power Read: 6.7W Average Active Power Write: 8.0W
Operating Temperature	0°C ~ +85°C
Storage Temperature	-40°C ~ +85°C
Max Shock Resistance	1,500G @ 0.5 ms half-sine
Max Vibration Resistance	Operating Vibration: 5 gRMS, 10-2000 Hz, 3 axes Non-operating Vibration: 4.9 gRMS, 7-800 Hz, 3 axes

Dimensions & Weight
Height	3.88mm
Width	22mm
Depth	80mm
Weight	8.6g

Additional Information
First Listed on Newegg	November 08, 2026

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Item#: 9SIBTK0MAB2353

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SANDISK 8TB Optimus™ GX PRO 850X PCIe® 4.0 x4 M.2 2280 NVMe™ SSD - SDSP81800TAN-000E0

Learn more about the SanDisk SDSP81800TAN-000E0

Customer Reviews of the SanDisk SDSP81800TAN-000E0

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Warranty, Returns, And Additional Information

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Return Policies

Manufacturer Contact Info