SanDisk Optimus GX PRO 850X M.2 2280-D5-M 4TB PCI-Express 4.0 x4 3D NAND TLC Internal Solid State Drive (SSD) SDSP81400TAH-000E0
- CHAMPION YOUR GAME SESSION AND CREATIVE WORKFLOW. Boasting PCIe Gen 4.0 Sequential Read/Write speeds up to 7,300/6,600 MB/s[2] (2TB[1] and 4TB[1] 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[2] (8TB[1] 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[1] and trusted SANDISK BiCS TLC 3D NAND, you’ll have room for more.
- COOL OPERATION, BLAZING SPEEDS. Includes the SANDISK Optimus heatsink with integrated programmable RGB LED to help your drive minimize throttle and maintain peak performance.
- DESIGNED WITH THE CREATOR IN MIND. With up to 4,800 TBW[3] (8TB[1] model) endurance rating, your drive stays by your side. Help protect your digital assets with TCG Opal v2.01 data-at-rest encryption.[
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Overview
Specs
Reviews
Overview
The SanDisk Optimus GX PRO 850X is a 4TB internal solid state drive with an M.2 2280-D5-M form factor, PCI-Express 4.0 x4 interface, NVMe 1.4 protocol, and 3D NAND TLC memory components. It includes a HeatSink and delivers high sequential and random performance supported by the listed specifications.
Key Features
- 4TB storage capacity
- M.2 2280-D5-M form factor
- PCI-Express 4.0 x4 interface with NVMe 1.4 protocol
- Up to 7300 MBps sequential read and 6600 MBps sequential write
- 3D NAND TLC memory components
- HeatSink included
Performance
The drive provides a maximum sequential read speed of up to 7300 MBps and maximum sequential write speed of up to 6600 MBps. Rated 4KB random performance reaches up to 1,200,000 IOPS for read and up to 1,100,000 IOPS for write. Power consumption is 5 mW at idle, with average active power of 8.0W for read and 7.2W for write.
Design
The M.2 2280-D5-M drive measures 80mm in depth, 24mm in width, and 10.31mm in height. Weight is 30.4g. The drive includes a HeatSink.
Connectivity & Compatibility
The internal SSD uses a PCI-Express 4.0 x4 interface and NVMe 1.4 protocol in an M.2 2280-D5-M form factor.
Reliability & Durability
The drive is rated for 2400TB terabytes written 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. Operating vibration is 5 gRMS, 10-2000 Hz, 3 axes, and non-operating vibration is 4.9 gRMS, 7-800 Hz, 3 axes.
Specifications
- Brand: SanDisk
- Series: Optimus GX PRO 850X
- Model: SDSP81400TAH-000E0
- Device Type: Internal Solid State Drive (SSD)
- Capacity: 4TB
- Form Factor: M.2 2280-D5-M
- Memory Components: 3D NAND TLC
- Interface: PCI-Express 4.0 x4
- Protocol: NVMe 1.4
- Max Sequential Read: Up to 7300 MBps
- Max Sequential Write: Up to 6600 MBps
- 4KB Random Read: Up to 1,200,000 IOPS
- 4KB Random Write: Up to 1,100,000 IOPS
- Terabytes Written (TBW): 2400TB
- MTBF: 1,750,000 hours
- HeatSink: with HeatSink
- Power Consumption (Idle): 5 mW
- Average Active Power Read: 8.0W
- Average Active Power Write: 7.2W
- Dimensions: 80mm depth, 24mm width, 10.31mm height
- Weight: 30.4g
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 5 years
- Limited Warranty period (labor): 5 years
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.ca's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-866-726-3475
- Support Website
- View other products from SanDisk
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The SanDisk Optimus GX PRO 850X is a 4TB M.2 2280 NVMe SSD with a heatsink and PCIe 4.0 x4 interface, suited to PC builders who want high-capacity storage with sequential read speeds up to 7,300 MB/s and write speeds up to 6,600 MB/s.
Recommended For
- PC or PS5 players expanding a large game library who want one 4TB M.2 drive; SanDisk lists the heatsink model as PS5 and PS5 Pro compatible.
- Video editors and other creators working with large active projects who want a 4TB PCIe 4.0 drive for project files and frequent reads or writes; SanDisk positions the 850X for creative workflows and rates the 4TB model at 2,400 TBW.
- Gaming-PC builders who want a high-end PCIe 4.0 drive for a large game collection and fast game loading, and whose M.2 slot has room for the included heatsink.
- Workstation users moving large files between fast NVMe storage who want a factory heatsink to help manage drive temperatures during intensive workloads.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | 4TB internal storage for gaming, business, or personal use |
| Capacity | 4TB |
| Interface And Form Factor | M.2 2280-D5-M SSD with PCIe 4.0 x4 and NVMe 1.4; includes a heatsink |
| Memory Technology | 3D NAND TLC |
| Read Write Performance | Sequential speeds up to 7,300 MB/s read and 6,600 MB/s write; 4KB random performance up to 1,200,000 IOPS read and 1,100,000 IOPS write |
| Endurance And Reliability | 2,400TB endurance rating and 1,750,000-hour MTBF |
| Power And Environmental Limits | 5mW idle power; average active power of 8.0W reading and 7.2W writing; operating temperature 0°C to 85°C and storage temperature −40°C to 85°C |
| Environmental Durability | Shock resistance up to 1,500G at 0.5ms; operating and non-operating vibration resistance specified across three axes |
| Compatibility | Compatible devices include desktops and laptops; listed as compatible with Sony PlayStation 5 |
| Physical Dimensions And Weight | 80 × 24 × 10.31mm; 30.4g |
| Model Identifiers | SanDisk Optimus GX PRO 850X; model SDSP81400TAH-000E0 |